Lesson plan

Multiply 2-digit by 1 or 2-digit whole numbers using rectangular arrays

teaches Common Core State Standards CCSS.Math.Content.4.NBT.B.5 http://corestandards.org/Math/Content/4/NBT/B/5
teaches Common Core State Standards CCSS.Math.Content.4.OA.A.3 http://corestandards.org/Math/Content/4/OA/A/3
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