Addition Worksheet

Solve.

1 a. ______ + 70 = 140
1 b. 20 + ______ = 110
2 a. 90 + ______ = 150
2 b. 60 + ______ = 90
3 a. ______ + 60 = 90
3 b. 80 + ______ = 160
4 a. 70 + ______ = 80
4 b. 50 + ______ = 80
5 a. 50 + ______ = 110
5 b. 80 + ______ = 130
6 a. ______ + 60 = 120
6 b. ______ + 10 = 20
7 a. ______ + 20 = 90
7 b. ______ + 90 = 100
8 a. ______ + 10 = 100
8 b. ______ + 40 = 120
9 a. 60 + ______ = 110
9 b. ______ + 70 = 120
10 a. ______ + 90 = 110
10 b. 60 + ______ = 120
Page 2

Answer Key

1 a. 70    
1 b. 90    
2 a. 60    
2 b. 30    
3 a. 30    
3 b. 80    
4 a. 10    
4 b. 30    
5 a. 60    
5 b. 50    
6 a. 60    
6 b. 10    
7 a. 70    
7 b. 10    
8 a. 90    
8 b. 80    
9 a. 50    
9 b. 50    
10 a. 20    
10 b. 60    


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