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.

21___
3___1
51___
146___
2___1
2013___
6___3
11___6
___11
179___
14___11
62___
107___
5___4
20___6
___515
11___6
___128
158___
158___
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