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___
1613___
2___1
10___5
11___5
___16
4___2
17___11
139___
159___
___76
___54
106___
137___
21___
___31
15___7
18___14
12___6
2013___
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