Addition Worksheet

Solve.

1 a. 20 + ______ = 30
1 b. 40 + ______ = 90
2 a. 50 + ______ = 90
2 b. 80 + ______ = 170
3 a. ______ + 80 = 110
3 b. 70 + ______ = 150
4 a. 50 + ______ = 100
4 b. ______ + 70 = 160
5 a. ______ + 30 = 70
5 b. 80 + ______ = 120
6 a. 10 + ______ = 60
6 b. 60 + ______ = 150
7 a. ______ + 40 = 60
7 b. 90 + ______ = 140
8 a. ______ + 20 = 100
8 b. 30 + ______ = 60
9 a. 10 + ______ = 100
9 b. 50 + ______ = 120
Page 2

Answer Key

1 a. 10    
1 b. 50    
2 a. 40    
2 b. 90    
3 a. 30    
3 b. 80    
4 a. 50    
4 b. 90    
5 a. 40    
5 b. 40    
6 a. 50    
6 b. 90    
7 a. 20    
7 b. 50    
8 a. 80    
8 b. 30    
9 a. 90    
9 b. 70    


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