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.

9___8
___21
21___
___81
21___
1413___
7___4
172___
19___8
74___
109___
8___2
174___
16___12
10___2
21___
9___1
13___4
20___15
121___
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