Common Core State Standard: 3.OA.8

Grade 3
Subject MATH
Domain Operations & Algebraic Thinking
Theme Solve problems involving the four operations, and identify and explain patterns in arithmetic
Standard Solve two-step word problems using the four operations. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding. (This standard is limited to problems posed with whole numbers and having whole-number answers; students should know how to perform operations in the conventional order when there are no parentheses to specify a particular order (Order of Operations).)
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