Addition Worksheet

Solve.

1 a. 80 + ______ = 170
1 b. 30 + ______ = 120
2 a. 70 + ______ = 80
2 b. ______ + 70 = 130
3 a. ______ + 60 = 120
3 b. 80 + ______ = 120
4 a. 60 + ______ = 120
4 b. ______ + 50 = 120
5 a. 50 + ______ = 140
5 b. ______ + 20 = 100
6 a. 70 + ______ = 160
6 b. ______ + 60 = 70
7 a. 50 + ______ = 110
7 b. ______ + 10 = 100
8 a. 70 + ______ = 140
8 b. ______ + 70 = 120
9 a. ______ + 40 = 130
9 b. ______ + 90 = 180
Page 2

Answer Key

1 a. 90    
1 b. 90    
2 a. 10    
2 b. 60    
3 a. 60    
3 b. 40    
4 a. 60    
4 b. 70    
5 a. 90    
5 b. 80    
6 a. 90    
6 b. 10    
7 a. 60    
7 b. 90    
8 a. 70    
8 b. 50    
9 a. 90    
9 b. 90    


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