Addition Worksheet

Solve.

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

Answer Key

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


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