Unit 4 Contents

Check-In: Questions 13–19

For Questions 13–19, draw number lines to show how the base-ten hoppers move.

1. The base-ten hopper starts at 0 and moves forward 1160.
2. Write a number sentence that shows how the hopper moved.
1. Show two ways that a base-ten hopper can start at 280 and move forward 430.
2. Where does the hopper stop?
1. The base-ten hopper starts at 1000 and moves back 319.
2. Write a number sentence that shows how the hopper moved and where it stopped.
1. Show how a base-ten hopper can start at 700 and move back 399 in as few moves as possible.
2. Where does the hopper stop?
1. Show how a base-ten hopper can start at 0 and move to 2250.
2. Write a number sentence to show how it moved.
18. For the starting numbers below, show how a base-ten hopper can move to get to 500. Write an addition number sentence for each. Then write a subtraction number sentence in the same family.
1. 285
2. 479
3. 203
19. For the starting numbers below, show how a base-ten hopper can move to get to 1000. Write an addition number sentence to show the moves. Then write a subtraction sentence in the same family.
1. 240
2. 465
3. 742

Practice using base-ten hoppers on the Helping Professor Peabody pages of your
Student Activity Book.