Unit 3 Contents

3. Sam drew his picture. He solved the problem: How much is 6 7? Look at Sam's picture and work. How did he solve the problem?

Sam wrote this story:

4. Jacob and Ana worked on this problem: How much is 4 20? They used connecting cubes to solve the problem. They made four trains of cubes. How long is each train?

They divided each train into two trains of ten cubes so that they could count by tens.

5. Look at the picture. How much is 4 20?