Addition Worksheet

Solve.

1 a. 30 + ______ = 90
1 b. 60 + ______ = 80
2 a. 60 + ______ = 120
2 b. 20 + ______ = 80
3 a. 40 + ______ = 60
3 b. ______ + 10 = 30
4 a. ______ + 90 = 110
4 b. 40 + ______ = 110
5 a. ______ + 60 = 90
5 b. ______ + 80 = 150
6 a. 50 + ______ = 80
6 b. 10 + ______ = 20
7 a. ______ + 10 = 70
7 b. 50 + ______ = 90
8 a. 20 + ______ = 50
8 b. ______ + 70 = 80
9 a. ______ + 20 = 90
9 b. 50 + ______ = 60
Page 2

Answer Key

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


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