Grade 2 Mathematics Module 5, Topic C, Lesson 13

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Objective: Relate manipulative representations to the subtraction algorithm, and use addition to explain why the subtraction method works.

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Common Core Learning Standards

CCLS State Standard
2.NBT.7 Add and subtract within 1000, using concrete models or drawings and strategies based on place value...
2.NBT.9 Explain why addition and subtraction strategies work, using place value and the properties of...

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