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.

18___9
4___1
___210
13___4
98___
___21
2___1
6___3
17___9
207___
154___
21___
16___9
135___
1917___
21___
18___4
1817___
17___5
19___4
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