Unit 4, Lesson 19-- Addition with Expanded Form

Lesson 19-- Addition with Expanded Form

Introduction

Hello Mathematicians! We have practiced using models and number lines to solve addition problems.  Today, we will work on  more strategies you can use. The goal should be for you to try out different strategies so that you can find a few that you feel comfortable using. 

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Video

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Interactive

Directions:

• Open the interactive drawing link below, and make a copy.
• To play  4 in a Row Addition:
  • Roll a dice (use the virtual dice below if needed)
  • Then, choose a problem in that column to practice finding the sum.
  • Afterwards, you can cover that number. Try to get 4 in a row to win.

4 in a Row Addition Interactive Drawing Links to an external site.

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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.) The taller bookshelf had 287 books. The shorter bookshelf had 156 books. How many books were on both shelves combined?  D (Draw a picture.) W (Write and solve an equation.)

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