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.

13___12
14___13
166___
16___12
31___
53___
10___9
81___
8___4
76___
73___
9___5
21___
___59
___29
20___12
121___
___161
13___8
___78
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