## Playing the Doubles Game - Section 2: Playing The Game

Playing the Doubles Game
Playing the Doubles Game

# Doubles Plus or Minus One

Unit 2: Adding and Subtracting the Basics
Lesson 9 of 18

## Big Idea: One of the Four Critical Areas of 2nd grade math is the application of understanding of models for addition and subtraction. An efficient way to do this is to develop strategies built on what students know.

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50 minutes

### Beth McKenna

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