Common Core State Standard: 4.OA.2

Grade 4
Subject MATH
Domain Operations & Algebraic Thinking
Theme Use the four operations with whole numbers to solve problems
Standard 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.
Reference URL http://www.corestandards.org/Math/Content/4/OA
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