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.

1312___
___54
13___1
___811
7___5
___56
20___13
___511
15___5
12___7
5___3
20___3
135___
145___
139___
___21
18___1
4___1
18___11
4___3
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