Addition Worksheet

Solve.

1 a. 77 + ______ = 100
1 b. ______ + 12 = 100
2 a. ______ + 39 = 100
2 b. ______ + 58 = 100
3 a. 28 + ______ = 100
3 b. 9 + ______ = 100
4 a. 79 + ______ = 100
4 b. ______ + 20 = 100
5 a. ______ + 24 = 100
5 b. 61 + ______ = 100
6 a. 82 + ______ = 100
6 b. 50 + ______ = 100
7 a. 5 + ______ = 100
7 b. ______ + 21 = 100
8 a. 78 + ______ = 100
8 b. 42 + ______ = 100
9 a. ______ + 82 = 100
9 b. ______ + 55 = 100
10 a. ______ + 88 = 100
10 b. ______ + 89 = 100
Page 2

Answer Key

1 a. 23    
1 b. 88    
2 a. 61    
2 b. 42    
3 a. 72    
3 b. 91    
4 a. 21    
4 b. 80    
5 a. 76    
5 b. 39    
6 a. 18    
6 b. 50    
7 a. 95    
7 b. 79    
8 a. 22    
8 b. 58    
9 a. 18    
9 b. 45    
10 a. 12    
10 b. 11    


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