Grade 1 Mathematics Module 1, Topic I, Lesson 34

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Objective: Model n – n and n – (n – 1) pictorially and as subtraction sentences.

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Common Core Learning Standards

CCLS State Standard
1.OA.5 Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).
1.OA.6 Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use...

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