1. Number Bonds to 20 19 + 1 = 20 18 + 2 = 20 17 + 3 = 20 16 + 4 = 20
= 20
= 20
= 20
= 20
= 20
= 20
= 20
= 20
= 20
= 20
= 20
= 20
= 20
= 20
= 20
= 20

2. Pair the numbers to make 20
Number Bonds for 20 10 11 15 12 7 5 16 8 9 13 4 10

3. Pair the numbers to make 20
Number Bonds for 20 14 18 19 13 17 1 7 2 20 3 6

4. Pair the numbers to make 20
Number Bonds for 20 14 15 17 9 12 8 5 11 16 3 6 4

5. Find the missing number
Number Bonds for 20
? = 20 2
? = 20 15
? = 20 7
? = 20 19
? = 20 4
? = 20 17
? = 20 10
? = 20 20
? = 20 6
? = 20 11

6. Now try these
Number Bonds for 20
= ? 5
= ? 17
= ? 18
= ? 16
= ? 3
= ? 14
= ? 8
= ? 9
= ? 7
= ? 13

7. And finally these
Number Bonds for 20
1. ? = 20 13
= ? 15
= ? 4
? = 20 17
? = 20 2
= ? 12
? = 8 12
? = 20 11
5. ? = 20 16
= ? 16

8. Worksheet (Print) 1. 18 + = 20 2. 13 + = 20 3. 16 + = 20 4. 10 + = 20
= 20
= 20
= 20
= 20
= 20
= 20
= 20
= 20
= 20
= 20
= 20
= 20
= 20
= 20
= 20
= 20
= 20
= 20
= 20
= 20 = = = = = = = = = = = = = = = = = = = =
= 20
= ?
= 20
= 8
= 20 =
= 20 =
= 20 =
= 20
= ?
= 20
= 8
= 20 =
= 20 =
= 20 =
Worksheet (Print)

9. Click on remaining numbers to remove or go to next slide.3 4 2
Click on the number that makes the middle number up to 20 1
Interactive 20 18 ? 6 9 5 7
Click on remaining numbers to remove or go to next slide.

10. Click on remaining numbers to remove or go to next slide.8 4 2
Click on the number that makes the middle number up to 1 13 ? 6 20 9 5 7
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11. Click on remaining numbers to remove or go to next slide.2 5 4
Click on the number that makes the middle number up to 8 9 ? 6 20 3 11 7
Click on remaining numbers to remove or go to next slide.

12. Click on remaining numbers to remove or go to next slide.12 15 14
Click on the number that makes the middle number up to 13 7 ? 16 20 11 18 19
Click on remaining numbers to remove or go to next slide.

13. Click on remaining numbers to remove or go to next slide.12 15 16
Click on the number that makes the middle number up to 13 4 ? 17 20 11 18 19
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14. Click on remaining numbers to remove or go to next slide.8 5 4
Click on the number that makes the middle number up to 3 12 ? 7 20 1 6 9
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15. Click on remaining numbers to remove or go to next slide.8 5 4
Click on the number that makes the middle number up to 3 14 ? 7 20 2 9 6
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16. Click on remaining numbers to remove or go to next slide.3 4 5
Click on the number that makes the middle number up to 20 1 15 ? 6 9 8 7
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17. Click on remaining numbers to remove or go to next slide.2 9 1
Click on the number that makes the middle number up to 8 16 ? 5 20 3 4 7
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18. Click on remaining numbers to remove or go to next slide.11 5 4
Click on the number that makes the middle number up to 10 10 ? 6 20 12 8 9
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19. Click on remaining numbers to remove or go to next slide.3 4 2
Click on the number that makes the middle number up to 20 1 18 ? 6 9 5 7
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20. Click on remaining numbers to remove or go to next slide.3 4 2
Click on the number that makes the middle number up to 17 1
Interactive Mixed 12 ? 6 9 5 7
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21. Click on remaining numbers to remove or go to next slide.3 4 7
Click on the number that makes the middle number up to 13 1 7 ? 8 9 5 6
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22. Click on remaining numbers to remove or go to next slide.3 4 9
Click on the number that makes the middle number up to 18 1 12 ? 8 6 5 7
Click on remaining numbers to remove or go to next slide.

23. Click on remaining numbers to remove or go to next slide.3 9 4
Click on the number that makes the middle number up to 17 1 8 ? 6 2 5 7
Click on remaining numbers to remove or go to next slide.

24. Click on remaining numbers to remove or go to next slide.8 4 3
Click on the number that makes the middle number up to 14 1 6 ? 11 9 5 7
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25. Click on remaining numbers to remove or go to next slide.11 4 5
Click on the number that makes the middle number up to 15 1 8 ? 6 9 8 7
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26. Click on remaining numbers to remove or go to next slide.3 2
Click on the number that makes the middle number up to 13 1 9 ? 6 4 5 7
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27. Click on remaining numbers to remove or go to next slide.3 4 1
Click on the number that makes the middle number up to 17 8 6 11 ? 9 5 7
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28. Click on remaining numbers to remove or go to next slide.3 4 2
Click on the number that makes the middle number up to 12 1 9 ? 6 8 5 7
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29. Click on remaining numbers to remove or go to next slide.13 14 16
Click on the number that makes the middle number up to 15 11 3 12 ? 9 15 17
Click on remaining numbers to remove or go to next slide.

30. Click on the number that makes the middle number up to2 10 6
Click on the number that makes the middle number up to 13 1 9 4 ? 3 5 17