Addition Worksheet

Solve.

1 a. ______ + 20 = 70
1 b. ______ + 70 = 130
2 a. ______ + 60 = 120
2 b. ______ + 70 = 110
3 a. ______ + 10 = 90
3 b. ______ + 10 = 30
4 a. 60 + ______ = 100
4 b. ______ + 60 = 100
5 a. 10 + ______ = 90
5 b. ______ + 80 = 160
6 a. 90 + ______ = 170
6 b. ______ + 80 = 170
7 a. 70 + ______ = 80
7 b. ______ + 80 = 120
8 a. 60 + ______ = 90
8 b. ______ + 20 = 100
9 a. ______ + 30 = 120
9 b. 30 + ______ = 90
10 a. ______ + 20 = 110
10 b. ______ + 30 = 70
Page 2

Answer Key

1 a. 50    
1 b. 60    
2 a. 60    
2 b. 40    
3 a. 80    
3 b. 20    
4 a. 40    
4 b. 40    
5 a. 80    
5 b. 80    
6 a. 80    
6 b. 90    
7 a. 10    
7 b. 40    
8 a. 30    
8 b. 80    
9 a. 90    
9 b. 60    
10 a. 90    
10 b. 40    


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