## use manipulatives - Section 3: Independent Practice

use manipulatives

# Is it addition or subtraction?

Unit 3: Addition Strategies
Lesson 9 of 9

## Big Idea: Addition and subtraction facts are related, and my First Graders need more practice in using properties of operations to make decisions about equations. This lesson has them decide which operation is being completed to make the equation true.

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35 minutes

### Jennifer Moon

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