Addition Worksheet

Solve.

1 a. ______ + 28 = 100
1 b. 77 + ______ = 100
2 a. 15 + ______ = 100
2 b. ______ + 98 = 100
3 a. 22 + ______ = 100
3 b. ______ + 64 = 100
4 a. ______ + 31 = 100
4 b. 70 + ______ = 100
5 a. ______ + 88 = 100
5 b. ______ + 58 = 100
6 a. 21 + ______ = 100
6 b. ______ + 39 = 100
7 a. 43 + ______ = 100
7 b. 3 + ______ = 100
8 a. 6 + ______ = 100
8 b. 2 + ______ = 100
9 a. 79 + ______ = 100
9 b. 94 + ______ = 100
10 a. 90 + ______ = 100
10 b. ______ + 66 = 100
Page 2

Answer Key

1 a. 72    
1 b. 23    
2 a. 85    
2 b. 2    
3 a. 78    
3 b. 36    
4 a. 69    
4 b. 30    
5 a. 12    
5 b. 42    
6 a. 79    
6 b. 61    
7 a. 57    
7 b. 97    
8 a. 94    
8 b. 98    
9 a. 21    
9 b. 6    
10 a. 10    
10 b. 34    


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