# What Were They Thinking?!

Unit 1: Order of operations & Number properties
Lesson 8 of 9

## Big Idea: Students will start to generalize a variety of strategies to uncover the number properties of addition.

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Standards:
Subject(s):
Math, commutative property of addition, associative property of addition, Number Sense and Operations, Operations and Expressions, identity property of addition, Mental Math, additive identity, number talk
54 minutes

### Erica Burnison

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