Day 20: Using the associative property to add 3 numbers

Introduction

Hi Mathematicians,

Today you will learn a strategy to help you easily add three numbers together. You will need something to write with. Please prepare your materials and then watch the video below.

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Video

 

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Activity

Click here to practice solving equations with 3 addends. Use the counters to help you and look for facts that you can easily solve.

 

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