Number Bonds Worksheet

Fill in the missing numbers to complete each number bond. The two parts at the bottom add up to the whole number at the top.

1513___
21___
___21
21___
18___17
8___7
181___
21___
___15
74___
20___3
14___5
6___2
___13
21___
3___2
15___1
___182
8___1
19___16
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