Practice using number bonds to find missing parts and make whole numbers up to 20.
Read each problem carefully. Fill in the missing number or explain the number bond. Show your work in the space provided.
Finding parts that make a whole number up to 20
Math - Grade 2-3
- 1
Complete the number bond: 8 and ___ make 20.
- 2
Complete the number bond: 15 and ___ make 20.
- 3
Write the two parts in this number bond: The whole is 18. One part is 9. What is the other part?
- 4
Mia has 11 blue beads and some red beads. She has 20 beads in all. How many red beads does Mia have?
- 5
Complete the number sentence: 6 + ___ = 20.
- 6
Complete the number bond: 7 and ___ make 16.
- 7
A basket has 13 apples. Some more apples are added, and now there are 20 apples. How many apples were added?
- 8
List three different number bonds that make 20.
- 9
Complete the number sentence: ___ + 4 = 17.
- 10
The whole is 19. The two parts are 10 and ___. Fill in the missing part.
- 11
Sam needs 20 stickers. He already has 16 stickers. How many more stickers does he need?
- 12
Complete this fact family for the number bond 12 and 5 make 17: 12 + 5 = 17, 5 + 12 = 17, 17 - 12 = ___, and 17 - 5 = ___.
- 13
Look at the ten-frames. One ten-frame is full, and the second ten-frame has 3 counters. How many more counters are needed to make 20?
- 14
Complete the number bond: 14 is the whole. One part is 6. What is the other part?
- 15
True or false: 9 and 11 are a number bond for 20. Explain your answer.