Grade 1 Mathematics Module 2, Topic B, Lesson 19

students observe butterfly

Objective: Compare efficiency of counting on and taking from ten.

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Common Core Learning Standards

CCLS State Standard
1.OA.4 Understand subtraction as an unknown-addend problem. For example, subtract 10 – 8 by finding the...
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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