Addition Worksheet

Solve.

1 a. ______ + 20 = 60
1 b. ______ + 78 = 138
2 a. 30 + ______ = 40
2 b. ______ + 90 = 104
3 a. ______ + 98 = 108
3 b. ______ + 51 = 71
4 a. ______ + 15 = 25
4 b. 60 + ______ = 125
5 a. ______ + 50 = 122
5 b. 71 + ______ = 141
6 a. 50 + ______ = 140
6 b. ______ + 65 = 105
7 a. ______ + 80 = 92
7 b. ______ + 26 = 96
8 a. 17 + ______ = 97
8 b. ______ + 90 = 171
9 a. 81 + ______ = 121
9 b. ______ + 20 = 96
10 a. ______ + 40 = 102
10 b. 70 + ______ = 130
Page 2

Answer Key

1 a. 40    
1 b. 60    
2 a. 10    
2 b. 14    
3 a. 10    
3 b. 20    
4 a. 10    
4 b. 65    
5 a. 72    
5 b. 70    
6 a. 90    
6 b. 40    
7 a. 12    
7 b. 70    
8 a. 80    
8 b. 81    
9 a. 40    
9 b. 76    
10 a. 62    
10 b. 60    


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