Unit 4 Contents

6. Work with a partner. Draw a number line. Show how a base-ten hopper can start at 0 and move forward 147. Find more than one way.
7. Work with a partner. Draw a number line.
   1. Show how a base-ten hopper can start at 37 and move forward 24. Where does it land?
   2. Show more than one way.
8. Work with a partner. Draw a number line.
   1. Show how a base-ten hopper can start at 100 and move back 24.
   2. Where does it land? Show more than one way.

Number Sentences

9. Professor Peabody looked for shorter ways to represent the moves of the base-ten hoppers. Study the number line below.
   
   1. The professor wrote the number sentence below to show how the hopper moved:
      
      233 = 100 + 100 + 10 + 10 + 10 + 1 + 1 + 1
      Explain how each number in the number sentence shows how the hopper moved.
   2. The professor thought of a shorter way to write a number sentence:
      
      233 = 200 + 30 + 3
      Explain how this number sentence shows how the hopper moved.