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LESSON SET
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.3 Created by Jeanette Simpson
teaches
Common Core State Standards
CCSS.Math.Content.3.OA.D.8
http://corestandards.org/Math/Content/3/OA/D/8