Addition Worksheet

Solve.

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

Answer Key

1 a. 80    
1 b. 30    
2 a. 20    
2 b. 40    
3 a. 70    
3 b. 20    
4 a. 20    
4 b. 30    
5 a. 70    
5 b. 90    
6 a. 30    
6 b. 20    
7 a. 40    
7 b. 10    
8 a. 20    
8 b. 10    
9 a. 90    
9 b. 10    
10 a. 80    
10 b. 80    


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