Unit 4, Lesson 20-- Addition with Chunking

Lesson 20-- Addition with Chunking

Introduction

Hello Mathematicians! Today we will work on a strategy called chunking to solve addition facts. This strategy is similar to using number lines, but without the line.

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Video

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In Your Math Notebook:

Let’s get out our math journals and  work through the following application problem. Make sure you read the problem carefully, draw a picture to match your thinking and write and solve an equation. Make sure to find an exact answer when there is not a clue that tells you to estimate.

Read, Draw, Write. DONE!

R (Read the problem carefully.) Third graders collected paper to recycle. They collected 158 pieces of paper on Monday and 227 pieces of paper on Tuesday. How many pieces of paper did the third graders collect? D (Draw a picture.) W (Write and solve an equation.)

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Assignment

Directions:

• Choose a strategy and solve the following problem.
• On the Next page, share your strategy and solution.

1,329 + 253 = ?

 

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