Unit 4 Contents

Study the number lines and number sentences in Questions 11 and 12 below.

1. 
   39 + 30 − 4 = 65
2. 
   39 + 20 + 1 + 5 = 65
3. How far is it from 39 to 65?
4. Complete the number sentence: 39 + = 65
1. 
   648 + 2 + 50 + 300 = 1000
2. 
   648 + 300 + 50 + 2 = 1000
3. How far is it from 648 to 1000?
4. Complete the number sentences:
   648 + = 1000 1000 − 648 =