Addition Worksheet

Solve.

1 a. 21 + ______ = 100
1 b. ______ + 12 = 100
2 a. ______ + 19 = 100
2 b. ______ + 57 = 100
3 a. ______ + 77 = 100
3 b. 37 + ______ = 100
4 a. ______ + 55 = 100
4 b. 71 + ______ = 100
5 a. ______ + 35 = 100
5 b. 50 + ______ = 100
6 a. ______ + 67 = 100
6 b. ______ + 14 = 100
7 a. 16 + ______ = 100
7 b. ______ + 99 = 100
8 a. 58 + ______ = 100
8 b. ______ + 91 = 100
9 a. 51 + ______ = 100
9 b. ______ + 24 = 100
10 a. 29 + ______ = 100
10 b. ______ + 74 = 100
Page 2

Answer Key

1 a. 79    
1 b. 88    
2 a. 81    
2 b. 43    
3 a. 23    
3 b. 63    
4 a. 45    
4 b. 29    
5 a. 65    
5 b. 50    
6 a. 33    
6 b. 86    
7 a. 84    
7 b. 1    
8 a. 42    
8 b. 9    
9 a. 49    
9 b. 76    
10 a. 71    
10 b. 26    


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