Addition Worksheet

Solve.

1 a. 10 + ______ = 70
1 b. 40 + ______ = 70
2 a. ______ + 40 = 90
2 b. ______ + 10 = 50
3 a. ______ + 70 = 90
3 b. ______ + 80 = 90
4 a. ______ + 80 = 150
4 b. ______ + 50 = 110
5 a. 70 + ______ = 100
5 b. 90 + ______ = 150
6 a. 10 + ______ = 40
6 b. 50 + ______ = 100
7 a. 50 + ______ = 140
7 b. ______ + 20 = 50
8 a. ______ + 60 = 150
8 b. ______ + 30 = 50
9 a. ______ + 80 = 130
9 b. 20 + ______ = 80
Page 2

Answer Key

1 a. 60    
1 b. 30    
2 a. 50    
2 b. 40    
3 a. 20    
3 b. 10    
4 a. 70    
4 b. 60    
5 a. 30    
5 b. 60    
6 a. 30    
6 b. 50    
7 a. 90    
7 b. 30    
8 a. 90    
8 b. 20    
9 a. 50    
9 b. 60    


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