2.0 Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to
represent the problem.
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Represent and solve problems involving addition and subtraction.
2. 0 Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, e.g., by using
objects, drawings, and equations with a symbol for the unknown number to represent the problem.
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Add and subtract within 20.
2. Fluently add and subtract within 20 using mental strategies.2 By end of Grade 2, know from memory all sums of two
one-digit numbers.
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2.0 Interpret whole-number quotients of whole numbers, e.g., interpret 56 ÷ 8 as the number of objects in each share when 56
objects are partitioned equally into 8 shares, or as a number of shares when 56 objects are partitioned into equal shares of 8
objects each. For example, describe a context in which a number of shares or a number of groups can be expressed as 56÷8.
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2.0 Multiply or divide to solve word problems involving multiplicative comparison, e.g., by using drawings and equations with a
symbol for the unknown number to represent the problem, distinguishing multiplicative comparison from additive comparison.1
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2.0 Write simple expressions that record calculations with numbers, and interpret numerical expressions without evaluating
them. For example, express the calculation “add 8 and 7, then multiply by 2” as 2 × (8 + 7). Recognize that
3 × (18932 + 921) is three times as large as 18932 + 921, without having to calculate the indicated sum or product.
2.1 Express a whole number in the range 2–50 as a product of its prime factors. For example, find the prime factors of 24 and
express 24 as 2 × 2 × 2 × 3. CA
Analyze patterns and relationships.
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