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.

121___
___64
2___1
7___6
12___2
9___3
12___1
21___
1913___
42___
___145
4___1
17___2
21___
1917___
9___3
157___
20___13
135___
153___
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