Unit 4, Lesson 24-- Subtraction with Number Lines

Lesson 24-- Subtraction with Number Lines 

Introduction

Hello Mathematicians! Yesterday we worked on using models to solve subtraction problems. Today we will work on another strategy to solve subtraction problems-- number lines.

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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 Subtraction:
  • 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 -  Subtraction 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.

Read, Draw, Write. DONE!

R (Read the problem carefully.) Lacy, the elephant, had 407 peanuts. She ate 129 of the peanuts. How many peanuts does Lacy have left? D (Draw a picture.) W (Write and solve an equation.)

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