Unit 4 Contents

12. Write number sentences to show how each base-ten hopper moved. Compare your sentences with a partner. Answer these questions:
• Do you agree that both number sentences are correct? If not, correct them.
• How do your sentences match the moves on the number line?
1. 
2. 

Use the Helping Professor Peabody pages in the Student Activity Book to practice showing partitions of numbers on a number line and with number sentences.

Draw number lines to show how the base-ten hoppers move.

• Show above the hop the distance and direction of each move.
• Show below the number line where the hopper lands after each move.

1. The base-ten hopper starts at 0 and moves forward 116.
2. Write a number sentence that shows how the hopper moved.
1. Show two ways that a base-ten hopper can start at 28 and move forward 43.
2. Where does the hopper stop?
1. The base-ten hopper starts at 200 and moves back 31.
2. Write a number sentence that shows how the hopper moved and where it stopped.
1. Show two ways that a base-ten hopper can start at 74 and move back 26.
2. Where does the hopper stop?