Addition Worksheet

Solve.

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

Answer Key

1 a. 40    
1 b. 30    
2 a. 10    
2 b. 30    
3 a. 80    
3 b. 30    
4 a. 40    
4 b. 10    
5 a. 80    
5 b. 40    
6 a. 70    
6 b. 30    
7 a. 60    
7 b. 80    
8 a. 80    
8 b. 80    
9 a. 90    
9 b. 60    


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