Organization: SAVVAS Product Name: envisionmath2.0 NYC Summer in the City Grade 2 Product Version: 1 Source: IMS Online Validator Profile: 1.2.0 Identifier: realize-fdd895c8-30f1-3df4-aa58-b25609df95ec Timestamp: Monday, December 7, 2020 11:50 AM EST Status: VALID! Conformant: true ----- VALID! ----- Resource Validation Results The document is valid. ----- VALID! ----- Schema Location Results Schema locations are valid. ----- VALID! ----- Schema Validation Results The document is valid. ----- VALID! ----- Schematron Validation Results The document is valid. Curriculum Standards: Sumar y restar hasta 100 con fluidez utilizando estrategias basadas en el valor de posición, las propiedades de las operaciones y/o la relación entre la suma y la resta. - 2.NBD.B.5 Use place value to describe whole numbers between 10 and 1000 in terms of hundreds, tens and ones. Know that 100 is 10 tens, and 1000 is 10 hundreds. - 2.1.1.2 Find 10 more or 10 less than a given three-digit number. Find 100 more or 100 less than a given three-digit number. - 2.1.1.3 Partition circles and rectangles into two, three, or four equal shares, describe the shares using the words halves, thirds, half of, a third of, etc., describe the whole as two halves, three thirds, four fourths. Recognize that equal shares of identical wholes need not have the same shape. - M.2.26 Read, write and represent whole numbers up to 1000. Representations may include numerals, addition, subtraction, multiplication, words, pictures, tally marks, number lines and manipulatives, such as bundles of sticks and base 10 blocks. - 2.1.1.1 Count within 1000; skip-count by 5s, 10s, and 100s. - NY-2.NBT.2 Fluently add and subtract within 20 using mental strategies and by end of Grade 2, know from memory all sums of two one-digit numbers. - M.2.2 Use an open number line to add tens and ones within 100. - 2.NC.3 Fluently add and subtract within 100 using strategies based on place value, properties of operations, and or the relationship between addition and subtraction. - NY-2.NBT.5 Add within 100 using place-value strategies. - 2.NC.4 Count within 1000 and skip-count by 5s, 10s and 100s. - M.2.6 Construct equal-sized portions through fair sharing including length, set, and area models for halves, thirds, and fourths. - 2.N.3.2 Find 10 more or 10 less than a given three-digit number. Find 100 more or 100 less than a given three-digit number. - 2.N.1.4 Mentally add 10 or 100 to a given number 100-900, and mentally subtract 10 or 100 from a given number 100-900. - NY-2.NBT.8 Identify the parts of a set and area that represent fractions for halves, thirds, and fourths. - 2.N.3.1 Demonstrate fluency with addition and subtraction, within 20, using mental strategies. - NC.2.OA.2 Add or subtract mentally 10 or 100 to or from a given number within 1000. - 2.NBT.B.10 Fluently add and subtract within 100 using strategies based on place value, properties of operations and/or the relationship between addition and subtraction. - M.2.9 (2a) Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten, e.g., 8 + 6 = 8 + 2 + 4= 10 + 4 = 14; decomposing a number leading to a ten, e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. (2b) Know from memory all sums within 20 of two one-digit numbers - NY-2.OA.2 Read, write, discuss, and represent whole numbers up to 1,000. Representations may include numerals, words, pictures, tally marks, number lines and manipulatives. - 2.N.1.1 Dividir círculos y rectángulos en dos, tres o cuatro partes iguales, describir las partes utilizando las palabras un medio de, un tercio de, mitad de, una tercera parte de, etc., y describir un entero como dos mitades, tres tercios, cuatro cuartos. Reconocer que las partes iguales de los enteros idénticos no tienen que tener la misma forma. - 2.G.A.3 Flexibly using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction. - NC.2.NBT.5.a The student will identify the number that is 10 more, 10 less, 100 more, and 100 less than a given number up to 999. - 2.1b Comparing addition and subtraction strategies, and explaining why they work. - NC.2.NBT.5.b Use place value and models to subtract 2-digit numbers. - 2.NC.30 Selecting an appropriate strategy in order to efficiently compute sums and differences. - NC.2.NBT.5.c Use place value to subtract 2-digit numbers. - 2.NC.31 Demonstrate that equal shares of identical wholes need not have the same shape. - 2.GM.A.3a The student will demonstrate fluency with addition and subtraction within 20. - 2.5b The student will recognize and use the relationships between addition and subtraction to solve single-step practical problems, with whole numbers to 20. - 2.5a Sumar mentalmente 10 ó 100 a un número dado entre 100 y 900, y restar mentalmente 10 ó 100 de un número dado entre 100 y 900. - 2.NBD.B.8 Partition circles and rectangles into two, three, or four equal shares. - NC.2.G.3 Add and subtract quickly and accurately using mental math strategies. - 2.OA.8 Make a 10 to subtract quickly and accurately. - 2.OA.7 Think addition to subtract quickly and accurately. - 2.OA.6 Count on and count back on a number line to subtract. - 2.OA.5 Use number patterns on an addition facts table to complete related addition equations that show basic facts. - 2.OA.4 Use objects and number lines to represent number sentences. - 2.A.2.1 Use the strategy of making a ten to add quickly and accurately. - 2.OA.3 Generate real-world situations to represent number sentences and vice versa. - 2.A.2.2 Use doubles and near doubles to add quickly and accurately. - 2.OA.2 Partition circles and rectangles into two, three or four equal shares, and describe the shares and the whole. - 2.GM.A.3 Apply commutative and identity properties and number sense to find values for unknowns that make number sentences involving addition and subtraction true or false. - 2.A.2.3 Use counting on to add numbers and add numbers in any order. - 2.OA.1 Demonstrate fluency with addition and subtraction within 20. - 2.RA.A.1 Use number sentences involving addition, subtraction, and unknowns to represent given problem situations. Use number sense and properties of addition and subtraction to find values for the unknowns that make the number sentences true. - 2.2.2.2 The student will count forward by twos, fives, and tens to 120, starting at various multiples of 2, 5, or 10. - 2.2a Add up to subtract using an open number line. - 2.NC.21 Break apart 1-digit numbers to make it easier to subtract mentally. - 2.NC.22 The student will create and solve single-step and two-step practical problems involving addition and subtraction. - 2.6c Solve real-world and mathematical addition and subtraction problems involving whole numbers with up to 2 digits. - 2.1.2.5 The student will determine sums and differences, using various methods. - 2.6b Use mental strategies and algorithms based on knowledge of place value to add and subtract two-digit numbers. Strategies may include decomposition, expanded notation, and partial sums and differences. - 2.1.2.4 Use strategies to generate addition and subtraction facts including making tens, fact families, doubles plus or minus one, counting on, counting back, and the commutative and associative properties. Use the relationship between addition and subtration to generate basic facts. - 2.1.2.1 Demonstrate fluency with basic addition facts and related subtraction facts. - 2.1.2.2 Contar hasta 1000; contar de cinco en cinco, de diez en diez y de cien en cien. - 2.NBD.A.2 Partition circles and rectangles into two, three, or four equal shares. Describe the shares using the words halves, thirds, half of, a third of, etc. Describe the whole as two halves, three thirds, four fourths. Recognize that equal shares of identical wholes need not have the same shape. - NY-2.G.3 Use strategies and algorithms based on knowledge of place value and equality to add and subtract two-digit numbers. - 2.N.2.4 Use the relationship between addition and subtraction to solve problems. - 2.NBT.B.9 Add or subtract within 1000, and justify the solution. - 2.NBT.B.8 Demonstrate fluency with basic addition facts and related subtraction facts up to 20. - 2.N.2.2 Use the relationship between addition and subtraction to generate basic facts up to 20. - 2.N.2.1 Count within 1000; skip-count by 5s, 10s, and 100s. - NC.2.NBT.2 Demonstrate fluency with addition and subtraction within 100. - 2.NBT.B.6 Add up to three two-digit numbers using strategies based on place value and properties of operations. - NC.2.NBT.6 Mentally add 10 or 100 to a given number 100–900, and mentally subtract 10 or 100 from a given number 100–900. - NC.2.NBT.8 Divide circles and rectangles into halves, thirds, and fourths. - 1.G.6 Mentally add 10 or 100 to a given number 100-900 and mentally subtract 10 or 100 from a given number 100-900. - M.2.12 Explain why addition and subtraction strategies work, using place value and the properties of operations. Instructional Note: Explanations may be supported by drawing or objects. - M.2.13 Subtract 10 or 100 mentally using place-value strategies. - 2.NC.53 Add using place value and partial sums. - 2.NC.10 Use models to add 2-digit numbers and then explain the work. - 2.NC.12 Add 2-digit numbers and then explain the work. - 2.NC.13 Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten; decomposing a number leading to a ten; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. - NY-2.OA.2a Know from memory all sums within 20 of two one-digit numbers - NY-2.OA.2b Represent, create, describe, complete, and extend growing and shrinking patterns with quantity and numbers in a variety of real-world and mathematical contexts. - 2.A.1.1 Write and solve problems involving addition and subtraction within 100. - 2.NBT.C.11 Identify, create and describe simple number patterns involving repeated addition or subtraction, skip counting and arrays of objects such as counters or tiles. Use patterns to solve problems in various contexts. - 2.2.1.1 Read and write numbers to 1000 using number names, base-ten numerals and expanded form. - 2.NBT.A.4 Count within 1000 by 1s, 10s and 100s starting with any number. - 2.NBT.A.3 Sumar y restar con fluidez hasta 20 utilizando estrategias mentales. Al terminar el Grado 2, saber de memoria todas las sumas de dos números de un dígito. - 2.OA.B.2 The student will demonstrate an understanding of equality through the use of the equal symbol and the use of the not equal symbol. - 2.17 The student will identify, describe, create, extend, and transfer patterns found in objects, pictures, and numbers. - 2.16 Explain that equal shares of identical wholes need not have the same shape. - NC.2.G.3.c Use place-value patterns to mentally count by 1s and 10s from a given number. - 2.NC.41 Skip count by 5s, 10s, and 100s using a number line. - 2.NC.42 The student will represent fractional parts with models and with symbols. - 2.4b The student will name and write fractions represented by a set, region, or length model for halves, fourths, eighths, thirds, and sixths. - 2.4a Describe the shares using the words halves, thirds, half of, a third of, fourths, fourth of, quarter of. - NC.2.G.3.a Describe the whole as two halves, three thirds, four 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I_fac33b58-463a-3aa8-9c20-eb8871e3e973_R/BasicLTI.xml I_fb48e2ab-2bdb-3676-ac8e-f171cfebf79d_R/BasicLTI.xml I_fb4c9750-7b84-3230-9245-0a9cec5098bf_1_R/BasicLTI.xml I_fbdb38d6-4513-3545-b9b1-a8c6ed4baf95_1_R/BasicLTI.xml I_fc71fbf3-09f3-3302-9044-17a12e482241_1_R/BasicLTI.xml I_fd018a20-8bb2-31a7-b1a9-1480ffbb75d2_1_R/BasicLTI.xml I_fd36d7db-3de5-3242-85c8-1499201e60c5_1_R/BasicLTI.xml I_fdf9a43a-5045-344c-8918-7a02fc765d5b_R/BasicLTI.xml I_fe846bb8-4f37-3e9c-ac5d-6c6dc76da04e_R/BasicLTI.xml I_ff0316f1-2976-39a5-8477-73e825e532c3_1_R/BasicLTI.xml I_ff7c6f89-602b-39a9-ad04-8bb18298d101_1_R/BasicLTI.xml Title: enVisionmath2.0 NYC Summer in the City Grade 2 Description: enVisionmath2.0 NYC Summer in the City Grade 2 Lesson 1: Addition Fact Strategies Lesson 1: Addition Fact Strategies Interactive Student Edition: Grade 2 Lesson 1 Addition Fact Strategies: Solve & Share Curriculum Standards: Use counting on to add numbers and add numbers in any order. Fluently add and subtract within 20 using mental strategies and by end of Grade 2, know from memory all sums of two one-digit numbers. The student will recognize and use the relationships between addition and subtraction to solve single-step practical problems, with whole numbers to 20. The student will demonstrate an understanding of equality through the use of the equal symbol and the use of the not equal symbol. Use strategies to generate addition and subtraction facts including making tens, fact families, doubles plus or minus one, counting on, counting back, and the commutative and associative properties. Use the relationship between addition and subtration to generate basic facts. Demonstrate fluency with basic addition facts and related subtraction facts. Solve real-world and mathematical addition and subtraction problems involving whole numbers with up to 2 digits. Use number sentences involving addition, subtraction, and unknowns to represent given problem situations. Use number sense and properties of addition and subtraction to find values for the unknowns that make the number sentences true. Demonstrate fluency with basic addition facts and related subtraction facts up to 20. Generate real-world situations to represent number sentences and vice versa. Demonstrate fluency with addition and subtraction, within 20, using mental strategies. Demonstrate fluency with addition and subtraction within 20. Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten; decomposing a number leading to a ten; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. Know from memory all sums within 20 of two one-digit numbers (2a) Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten, e.g., 8 + 6 = 8 + 2 + 4= 10 + 4 = 14; decomposing a number leading to a ten, e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. (2b) Know from memory all sums within 20 of two one-digit numbers Addition Fact Strategies: Visual Learning Curriculum Standards: Use counting on to add numbers and add numbers in any order. Fluently add and subtract within 20 using mental strategies and by end of Grade 2, know from memory all sums of two one-digit numbers. The student will recognize and use the relationships between addition and subtraction to solve single-step practical problems, with whole numbers to 20. The student will demonstrate an understanding of equality through the use of the equal symbol and the use of the not equal symbol. Use strategies to generate addition and subtraction facts including making tens, fact families, doubles plus or minus one, counting on, counting back, and the commutative and associative properties. Use the relationship between addition and subtration to generate basic facts. Demonstrate fluency with basic addition facts and related subtraction facts. Solve real-world and mathematical addition and subtraction problems involving whole numbers with up to 2 digits. Use number sentences involving addition, subtraction, and unknowns to represent given problem situations. Use number sense and properties of addition and subtraction to find values for the unknowns that make the number sentences true. Demonstrate fluency with basic addition facts and related subtraction facts up to 20. Generate real-world situations to represent number sentences and vice versa. Demonstrate fluency with addition and subtraction, within 20, using mental strategies. Demonstrate fluency with addition and subtraction within 20. Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten; decomposing a number leading to a ten; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. Know from memory all sums within 20 of two one-digit numbers (2a) Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten, e.g., 8 + 6 = 8 + 2 + 4= 10 + 4 = 14; decomposing a number leading to a ten, e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. (2b) Know from memory all sums within 20 of two one-digit numbers Addition Fact Strategies: Do You Understand? Curriculum Standards: Use counting on to add numbers and add numbers in any order. Fluently add and subtract within 20 using mental strategies and by end of Grade 2, know from memory all sums of two one-digit numbers. The student will recognize and use the relationships between addition and subtraction to solve single-step practical problems, with whole numbers to 20. The student will demonstrate an understanding of equality through the use of the equal symbol and the use of the not equal symbol. Use strategies to generate addition and subtraction facts including making tens, fact families, doubles plus or minus one, counting on, counting back, and the commutative and associative properties. Use the relationship between addition and subtration to generate basic facts. Demonstrate fluency with basic addition facts and related subtraction facts. Solve real-world and mathematical addition and subtraction problems involving whole numbers with up to 2 digits. Use number sentences involving addition, subtraction, and unknowns to represent given problem situations. Use number sense and properties of addition and subtraction to find values for the unknowns that make the number sentences true. Demonstrate fluency with basic addition facts and related subtraction facts up to 20. Generate real-world situations to represent number sentences and vice versa. Demonstrate fluency with addition and subtraction, within 20, using mental strategies. Demonstrate fluency with addition and subtraction within 20. Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten; decomposing a number leading to a ten; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. Know from memory all sums within 20 of two one-digit numbers (2a) Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten, e.g., 8 + 6 = 8 + 2 + 4= 10 + 4 = 14; decomposing a number leading to a ten, e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. (2b) Know from memory all sums within 20 of two one-digit numbers Addition Fact Strategies: Practice Curriculum Standards: Use counting on to add numbers and add numbers in any order. Fluently add and subtract within 20 using mental strategies and by end of Grade 2, know from memory all sums of two one-digit numbers. The student will recognize and use the relationships between addition and subtraction to solve single-step practical problems, with whole numbers to 20. The student will demonstrate an understanding of equality through the use of the equal symbol and the use of the not equal symbol. Use strategies to generate addition and subtraction facts including making tens, fact families, doubles plus or minus one, counting on, counting back, and the commutative and associative properties. Use the relationship between addition and subtration to generate basic facts. Demonstrate fluency with basic addition facts and related subtraction facts. Solve real-world and mathematical addition and subtraction problems involving whole numbers with up to 2 digits. Use number sentences involving addition, subtraction, and unknowns to represent given problem situations. Use number sense and properties of addition and subtraction to find values for the unknowns that make the number sentences true. Demonstrate fluency with basic addition facts and related subtraction facts up to 20. Generate real-world situations to represent number sentences and vice versa. Demonstrate fluency with addition and subtraction, within 20, using mental strategies. Demonstrate fluency with addition and subtraction within 20. Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten; decomposing a number leading to a ten; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. Know from memory all sums within 20 of two one-digit numbers (2a) Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten, e.g., 8 + 6 = 8 + 2 + 4= 10 + 4 = 14; decomposing a number leading to a ten, e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. (2b) Know from memory all sums within 20 of two one-digit numbers Addition Fact Strategies: Interactive Practice Buddy Curriculum Standards: Use counting on to add numbers and add numbers in any order. Fluently add and subtract within 20 using mental strategies and by end of Grade 2, know from memory all sums of two one-digit numbers. The student will recognize and use the relationships between addition and subtraction to solve single-step practical problems, with whole numbers to 20. The student will demonstrate an understanding of equality through the use of the equal symbol and the use of the not equal symbol. Use strategies to generate addition and subtraction facts including making tens, fact families, doubles plus or minus one, counting on, counting back, and the commutative and associative properties. Use the relationship between addition and subtration to generate basic facts. Demonstrate fluency with basic addition facts and related subtraction facts. Solve real-world and mathematical addition and subtraction problems involving whole numbers with up to 2 digits. Use number sentences involving addition, subtraction, and unknowns to represent given problem situations. Use number sense and properties of addition and subtraction to find values for the unknowns that make the number sentences true. Demonstrate fluency with basic addition facts and related subtraction facts up to 20. Generate real-world situations to represent number sentences and vice versa. Demonstrate fluency with addition and subtraction, within 20, using mental strategies. Demonstrate fluency with addition and subtraction within 20. Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten; decomposing a number leading to a ten; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. Know from memory all sums within 20 of two one-digit numbers (2a) Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten, e.g., 8 + 6 = 8 + 2 + 4= 10 + 4 = 14; decomposing a number leading to a ten, e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. (2b) Know from memory all sums within 20 of two one-digit numbers Lesson 1: Homework & Practice Curriculum Standards: Use counting on to add numbers and add numbers in any order. Fluently add and subtract within 20 using mental strategies and by end of Grade 2, know from memory all sums of two one-digit numbers. The student will recognize and use the relationships between addition and subtraction to solve single-step practical problems, with whole numbers to 20. The student will demonstrate an understanding of equality through the use of the equal symbol and the use of the not equal symbol. Use strategies to generate addition and subtraction facts including making tens, fact families, doubles plus or minus one, counting on, counting back, and the commutative and associative properties. Use the relationship between addition and subtration to generate basic facts. Demonstrate fluency with basic addition facts and related subtraction facts. Solve real-world and mathematical addition and subtraction problems involving whole numbers with up to 2 digits. Use number sentences involving addition, subtraction, and unknowns to represent given problem situations. Use number sense and properties of addition and subtraction to find values for the unknowns that make the number sentences true. Demonstrate fluency with basic addition facts and related subtraction facts up to 20. Generate real-world situations to represent number sentences and vice versa. Demonstrate fluency with addition and subtraction, within 20, using mental strategies. Demonstrate fluency with addition and subtraction within 20. Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten; decomposing a number leading to a ten; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. Know from memory all sums within 20 of two one-digit numbers (2a) Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten, e.g., 8 + 6 = 8 + 2 + 4= 10 + 4 = 14; decomposing a number leading to a ten, e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. (2b) Know from memory all sums within 20 of two one-digit numbers Lesson 1: Homework & Practice Curriculum Standards: Use counting on to add numbers and add numbers in any order. Fluently add and subtract within 20 using mental strategies and by end of Grade 2, know from memory all sums of two one-digit numbers. The student will recognize and use the relationships between addition and subtraction to solve single-step practical problems, with whole numbers to 20. The student will demonstrate an understanding of equality through the use of the equal symbol and the use of the not equal symbol. Use strategies to generate addition and subtraction facts including making tens, fact families, doubles plus or minus one, counting on, counting back, and the commutative and associative properties. Use the relationship between addition and subtration to generate basic facts. Demonstrate fluency with basic addition facts and related subtraction facts. Solve real-world and mathematical addition and subtraction problems involving whole numbers with up to 2 digits. Use number sentences involving addition, subtraction, and unknowns to represent given problem situations. Use number sense and properties of addition and subtraction to find values for the unknowns that make the number sentences true. Demonstrate fluency with basic addition facts and related subtraction facts up to 20. Generate real-world situations to represent number sentences and vice versa. Demonstrate fluency with addition and subtraction, within 20, using mental strategies. Demonstrate fluency with addition and subtraction within 20. Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten; decomposing a number leading to a ten; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. Know from memory all sums within 20 of two one-digit numbers (2a) Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten, e.g., 8 + 6 = 8 + 2 + 4= 10 + 4 = 14; decomposing a number leading to a ten, e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. (2b) Know from memory all sums within 20 of two one-digit numbers Addition Fact Strategies: Quick Check Curriculum Standards: Use counting on to add numbers and add numbers in any order. Fluently add and subtract within 20 using mental strategies and by end of Grade 2, know from memory all sums of two one-digit numbers. The student will recognize and use the relationships between addition and subtraction to solve single-step practical problems, with whole numbers to 20. The student will demonstrate an understanding of equality through the use of the equal symbol and the use of the not equal symbol. Use strategies to generate addition and subtraction facts including making tens, fact families, doubles plus or minus one, counting on, counting back, and the commutative and associative properties. Use the relationship between addition and subtration to generate basic facts. Demonstrate fluency with basic addition facts and related subtraction facts. Solve real-world and mathematical addition and subtraction problems involving whole numbers with up to 2 digits. Use number sentences involving addition, subtraction, and unknowns to represent given problem situations. Use number sense and properties of addition and subtraction to find values for the unknowns that make the number sentences true. Demonstrate fluency with basic addition facts and related subtraction facts up to 20. Generate real-world situations to represent number sentences and vice versa. Demonstrate fluency with addition and subtraction, within 20, using mental strategies. Demonstrate fluency with addition and subtraction within 20. Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten; decomposing a number leading to a ten; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. Know from memory all sums within 20 of two one-digit numbers (2a) Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten, e.g., 8 + 6 = 8 + 2 + 4= 10 + 4 = 14; decomposing a number leading to a ten, e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. (2b) Know from memory all sums within 20 of two one-digit numbers Lección 1: Estrategias con operaciones de suma Libro interactivo del estudiante: Grado 2 Lección 1 Estrategias con operaciones de suma: Resuélvelo y coméntalo Curriculum Standards: Use counting on to add numbers and add numbers in any order. Fluently add and subtract within 20 using mental strategies and by end of Grade 2, know from memory all sums of two one-digit numbers. The student will recognize and use the relationships between addition and subtraction to solve single-step practical problems, with whole numbers to 20. The student will demonstrate an understanding of equality through the use of the equal symbol and the use of the not equal symbol. Use strategies to generate addition and subtraction facts including making tens, fact families, doubles plus or minus one, counting on, counting back, and the commutative and associative properties. Use the relationship between addition and subtration to generate basic facts. Demonstrate fluency with basic addition facts and related subtraction facts. Solve real-world and mathematical addition and subtraction problems involving whole numbers with up to 2 digits. Use number sentences involving addition, subtraction, and unknowns to represent given problem situations. Use number sense and properties of addition and subtraction to find values for the unknowns that make the number sentences true. Demonstrate fluency with basic addition facts and related subtraction facts up to 20. Generate real-world situations to represent number sentences and vice versa. Demonstrate fluency with addition and subtraction, within 20, using mental strategies. Demonstrate fluency with addition and subtraction within 20. Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten; decomposing a number leading to a ten; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. Know from memory all sums within 20 of two one-digit numbers (2a) Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten, e.g., 8 + 6 = 8 + 2 + 4= 10 + 4 = 14; decomposing a number leading to a ten, e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. (2b) Know from memory all sums within 20 of two one-digit numbers Estrategias con operaciones de suma: Aprendizaje visual Curriculum Standards: Use counting on to add numbers and add numbers in any order. Fluently add and subtract within 20 using mental strategies and by end of Grade 2, know from memory all sums of two one-digit numbers. The student will recognize and use the relationships between addition and subtraction to solve single-step practical problems, with whole numbers to 20. The student will demonstrate an understanding of equality through the use of the equal symbol and the use of the not equal symbol. Use strategies to generate addition and subtraction facts including making tens, fact families, doubles plus or minus one, counting on, counting back, and the commutative and associative properties. Use the relationship between addition and subtration to generate basic facts. Demonstrate fluency with basic addition facts and related subtraction facts. Solve real-world and mathematical addition and subtraction problems involving whole numbers with up to 2 digits. Use number sentences involving addition, subtraction, and unknowns to represent given problem situations. Use number sense and properties of addition and subtraction to find values for the unknowns that make the number sentences true. Demonstrate fluency with basic addition facts and related subtraction facts up to 20. Generate real-world situations to represent number sentences and vice versa. Demonstrate fluency with addition and subtraction, within 20, using mental strategies. Demonstrate fluency with addition and subtraction within 20. Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten; decomposing a number leading to a ten; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. Know from memory all sums within 20 of two one-digit numbers (2a) Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten, e.g., 8 + 6 = 8 + 2 + 4= 10 + 4 = 14; decomposing a number leading to a ten, e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. (2b) Know from memory all sums within 20 of two one-digit numbers Estrategias con operaciones de suma: ¿Lo entiendes? Curriculum Standards: Use counting on to add numbers and add numbers in any order. Fluently add and subtract within 20 using mental strategies and by end of Grade 2, know from memory all sums of two one-digit numbers. The student will recognize and use the relationships between addition and subtraction to solve single-step practical problems, with whole numbers to 20. The student will demonstrate an understanding of equality through the use of the equal symbol and the use of the not equal symbol. Use strategies to generate addition and subtraction facts including making tens, fact families, doubles plus or minus one, counting on, counting back, and the commutative and associative properties. Use the relationship between addition and subtration to generate basic facts. Demonstrate fluency with basic addition facts and related subtraction facts. Solve real-world and mathematical addition and subtraction problems involving whole numbers with up to 2 digits. Use number sentences involving addition, subtraction, and unknowns to represent given problem situations. Use number sense and properties of addition and subtraction to find values for the unknowns that make the number sentences true. Demonstrate fluency with basic addition facts and related subtraction facts up to 20. Generate real-world situations to represent number sentences and vice versa. Demonstrate fluency with addition and subtraction, within 20, using mental strategies. Demonstrate fluency with addition and subtraction within 20. Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten; decomposing a number leading to a ten; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. Know from memory all sums within 20 of two one-digit numbers (2a) Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten, e.g., 8 + 6 = 8 + 2 + 4= 10 + 4 = 14; decomposing a number leading to a ten, e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. (2b) Know from memory all sums within 20 of two one-digit numbers Estrategias con operaciones de suma: Práctica Curriculum Standards: Use counting on to add numbers and add numbers in any order. Fluently add and subtract within 20 using mental strategies and by end of Grade 2, know from memory all sums of two one-digit numbers. The student will recognize and use the relationships between addition and subtraction to solve single-step practical problems, with whole numbers to 20. The student will demonstrate an understanding of equality through the use of the equal symbol and the use of the not equal symbol. Use strategies to generate addition and subtraction facts including making tens, fact families, doubles plus or minus one, counting on, counting back, and the commutative and associative properties. Use the relationship between addition and subtration to generate basic facts. Demonstrate fluency with basic addition facts and related subtraction facts. Solve real-world and mathematical addition and subtraction problems involving whole numbers with up to 2 digits. Use number sentences involving addition, subtraction, and unknowns to represent given problem situations. Use number sense and properties of addition and subtraction to find values for the unknowns that make the number sentences true. Demonstrate fluency with basic addition facts and related subtraction facts up to 20. Generate real-world situations to represent number sentences and vice versa. Demonstrate fluency with addition and subtraction, within 20, using mental strategies. Demonstrate fluency with addition and subtraction within 20. Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten; decomposing a number leading to a ten; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. Know from memory all sums within 20 of two one-digit numbers (2a) Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten, e.g., 8 + 6 = 8 + 2 + 4= 10 + 4 = 14; decomposing a number leading to a ten, e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. (2b) Know from memory all sums within 20 of two one-digit numbers Estrategias con operaciones de suma: Amigo de práctica interactiva Curriculum Standards: Use counting on to add numbers and add numbers in any order. Fluently add and subtract within 20 using mental strategies and by end of Grade 2, know from memory all sums of two one-digit numbers. The student will recognize and use the relationships between addition and subtraction to solve single-step practical problems, with whole numbers to 20. The student will demonstrate an understanding of equality through the use of the equal symbol and the use of the not equal symbol. Use strategies to generate addition and subtraction facts including making tens, fact families, doubles plus or minus one, counting on, counting back, and the commutative and associative properties. Use the relationship between addition and subtration to generate basic facts. Demonstrate fluency with basic addition facts and related subtraction facts. Solve real-world and mathematical addition and subtraction problems involving whole numbers with up to 2 digits. Use number sentences involving addition, subtraction, and unknowns to represent given problem situations. Use number sense and properties of addition and subtraction to find values for the unknowns that make the number sentences true. Demonstrate fluency with basic addition facts and related subtraction facts up to 20. Generate real-world situations to represent number sentences and vice versa. Demonstrate fluency with addition and subtraction, within 20, using mental strategies. Demonstrate fluency with addition and subtraction within 20. Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten; decomposing a number leading to a ten; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. Know from memory all sums within 20 of two one-digit numbers (2a) Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten, e.g., 8 + 6 = 8 + 2 + 4= 10 + 4 = 14; decomposing a number leading to a ten, e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. (2b) Know from memory all sums within 20 of two one-digit numbers Lección 1: Tarea y práctica Curriculum Standards: Sumar y restar con fluidez hasta 20 utilizando estrategias mentales. Al terminar el Grado 2, saber de memoria todas las sumas de dos números de un dígito. Sumar y restar con fluidez hasta 20 utilizando estrategias mentales. Saber de memoria todas las sumas de dos números de un dígito. (2a) Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten, e.g., 8 + 6 = 8 + 2 + 4= 10 + 4 = 14; decomposing a number leading to a ten, e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. (2b) Know from memory all sums within 20 of two one-digit numbers Lección 1: Tarea y práctica Curriculum Standards: Sumar y restar con fluidez hasta 20 utilizando estrategias mentales. Al terminar el Grado 2, saber de memoria todas las sumas de dos números de un dígito. Sumar y restar con fluidez hasta 20 utilizando estrategias mentales. Saber de memoria todas las sumas de dos números de un dígito. (2a) Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten, e.g., 8 + 6 = 8 + 2 + 4= 10 + 4 = 14; decomposing a number leading to a ten, e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. (2b) Know from memory all sums within 20 of two one-digit numbers Estrategias con operaciones de suma: Comprobación rápida Curriculum Standards: Sumar y restar con fluidez hasta 20 utilizando estrategias mentales. Al terminar el Grado 2, saber de memoria todas las sumas de dos números de un dígito. Sumar y restar con fluidez hasta 20 utilizando estrategias mentales. Saber de memoria todas las sumas de dos números de un dígito. (2a) Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten, e.g., 8 + 6 = 8 + 2 + 4= 10 + 4 = 14; decomposing a number leading to a ten, e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. (2b) Know from memory all sums within 20 of two one-digit numbers Lesson 2: Doubles and Near Doubles Lesson 2: Doubles and Near Doubles Interactive Student Edition: Grade 2 Lesson 2 Doubles and Near Doubles: Solve & Share Curriculum Standards: Use doubles and near doubles to add quickly and accurately. Fluently add and subtract within 20 using mental strategies and by end of Grade 2, know from memory all sums of two one-digit numbers. The student will recognize and use the relationships between addition and subtraction to solve single-step practical problems, with whole numbers to 20. The student will demonstrate an understanding of equality through the use of the equal symbol and the use of the not equal symbol. Use strategies to generate addition and subtraction facts including making tens, fact families, doubles plus or minus one, counting on, counting back, and the commutative and associative properties. Use the relationship between addition and subtration to generate basic facts. Demonstrate fluency with basic addition facts and related subtraction facts. Solve real-world and mathematical addition and subtraction problems involving whole numbers with up to 2 digits. Use number sentences involving addition, subtraction, and unknowns to represent given problem situations. Use number sense and properties of addition and subtraction to find values for the unknowns that make the number sentences true. Generate real-world situations to represent number sentences and vice versa. Demonstrate fluency with addition and subtraction, within 20, using mental strategies. Demonstrate fluency with addition and subtraction within 20. Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten; decomposing a number leading to a ten; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. Know from memory all sums within 20 of two one-digit numbers (2a) Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten, e.g., 8 + 6 = 8 + 2 + 4= 10 + 4 = 14; decomposing a number leading to a ten, e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. (2b) Know from memory all sums within 20 of two one-digit numbers Doubles and Near Doubles: Visual Learning Curriculum Standards: Use doubles and near doubles to add quickly and accurately. Fluently add and subtract within 20 using mental strategies and by end of Grade 2, know from memory all sums of two one-digit numbers. The student will recognize and use the relationships between addition and subtraction to solve single-step practical problems, with whole numbers to 20. The student will demonstrate an understanding of equality through the use of the equal symbol and the use of the not equal symbol. Use strategies to generate addition and subtraction facts including making tens, fact families, doubles plus or minus one, counting on, counting back, and the commutative and associative properties. Use the relationship between addition and subtration to generate basic facts. Demonstrate fluency with basic addition facts and related subtraction facts. Solve real-world and mathematical addition and subtraction problems involving whole numbers with up to 2 digits. Use number sentences involving addition, subtraction, and unknowns to represent given problem situations. Use number sense and properties of addition and subtraction to find values for the unknowns that make the number sentences true. Generate real-world situations to represent number sentences and vice versa. Demonstrate fluency with addition and subtraction, within 20, using mental strategies. Demonstrate fluency with addition and subtraction within 20. Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten; decomposing a number leading to a ten; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. Know from memory all sums within 20 of two one-digit numbers (2a) Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten, e.g., 8 + 6 = 8 + 2 + 4= 10 + 4 = 14; decomposing a number leading to a ten, e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. (2b) Know from memory all sums within 20 of two one-digit numbers Doubles and Near Doubles: Do You Understand? Curriculum Standards: Use doubles and near doubles to add quickly and accurately. Fluently add and subtract within 20 using mental strategies and by end of Grade 2, know from memory all sums of two one-digit numbers. The student will recognize and use the relationships between addition and subtraction to solve single-step practical problems, with whole numbers to 20. The student will demonstrate an understanding of equality through the use of the equal symbol and the use of the not equal symbol. Use strategies to generate addition and subtraction facts including making tens, fact families, doubles plus or minus one, counting on, counting back, and the commutative and associative properties. Use the relationship between addition and subtration to generate basic facts. Demonstrate fluency with basic addition facts and related subtraction facts. Solve real-world and mathematical addition and subtraction problems involving whole numbers with up to 2 digits. Use number sentences involving addition, subtraction, and unknowns to represent given problem situations. Use number sense and properties of addition and subtraction to find values for the unknowns that make the number sentences true. Generate real-world situations to represent number sentences and vice versa. Demonstrate fluency with addition and subtraction, within 20, using mental strategies. Demonstrate fluency with addition and subtraction within 20. Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten; decomposing a number leading to a ten; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. Know from memory all sums within 20 of two one-digit numbers (2a) Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten, e.g., 8 + 6 = 8 + 2 + 4= 10 + 4 = 14; decomposing a number leading to a ten, e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. (2b) Know from memory all sums within 20 of two one-digit numbers Doubles and Near Doubles: Practice Curriculum Standards: Use doubles and near doubles to add quickly and accurately. Fluently add and subtract within 20 using mental strategies and by end of Grade 2, know from memory all sums of two one-digit numbers. The student will recognize and use the relationships between addition and subtraction to solve single-step practical problems, with whole numbers to 20. The student will demonstrate an understanding of equality through the use of the equal symbol and the use of the not equal symbol. Use strategies to generate addition and subtraction facts including making tens, fact families, doubles plus or minus one, counting on, counting back, and the commutative and associative properties. Use the relationship between addition and subtration to generate basic facts. Demonstrate fluency with basic addition facts and related subtraction facts. Solve real-world and mathematical addition and subtraction problems involving whole numbers with up to 2 digits. Use number sentences involving addition, subtraction, and unknowns to represent given problem situations. Use number sense and properties of addition and subtraction to find values for the unknowns that make the number sentences true. Generate real-world situations to represent number sentences and vice versa. Demonstrate fluency with addition and subtraction, within 20, using mental strategies. Demonstrate fluency with addition and subtraction within 20. Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten; decomposing a number leading to a ten; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. Know from memory all sums within 20 of two one-digit numbers (2a) Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten, e.g., 8 + 6 = 8 + 2 + 4= 10 + 4 = 14; decomposing a number leading to a ten, e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. (2b) Know from memory all sums within 20 of two one-digit numbers Doubles and Near Doubles: Interactive Practice Buddy Curriculum Standards: Use doubles and near doubles to add quickly and accurately. Fluently add and subtract within 20 using mental strategies and by end of Grade 2, know from memory all sums of two one-digit numbers. The student will recognize and use the relationships between addition and subtraction to solve single-step practical problems, with whole numbers to 20. The student will demonstrate an understanding of equality through the use of the equal symbol and the use of the not equal symbol. Use strategies to generate addition and subtraction facts including making tens, fact families, doubles plus or minus one, counting on, counting back, and the commutative and associative properties. Use the relationship between addition and subtration to generate basic facts. Demonstrate fluency with basic addition facts and related subtraction facts. Solve real-world and mathematical addition and subtraction problems involving whole numbers with up to 2 digits. Use number sentences involving addition, subtraction, and unknowns to represent given problem situations. Use number sense and properties of addition and subtraction to find values for the unknowns that make the number sentences true. Generate real-world situations to represent number sentences and vice versa. Demonstrate fluency with addition and subtraction, within 20, using mental strategies. Demonstrate fluency with addition and subtraction within 20. Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten; decomposing a number leading to a ten; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. Know from memory all sums within 20 of two one-digit numbers (2a) Fluently add and subtract within 20 using mental strategies. Strategies could include: counting on; making ten, e.g., 8 + 6 = 8 + 2 + 4= 10 + 4 = 14; decomposing a number leading to a ten, e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9; using the relationship between addition and subtraction, e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4; and creating equivalent but easier or known sums, e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13. (2b) Know from memory all sums within 20 of two one-digit numbers Lesson 2: Homework & Practice Curriculum Standards: Use doubles and near doubles to add quickly and accurately. Fluently add and subtract within 20 usin