Addition Worksheet

Solve.

1 a. ______ + 50 = 60
1 b. ______ + 10 = 50
2 a. 70 + ______ = 140
2 b. 50 + ______ = 80
3 a. ______ + 20 = 50
3 b. ______ + 80 = 160
4 a. ______ + 50 = 140
4 b. ______ + 50 = 130
5 a. ______ + 10 = 80
5 b. 40 + ______ = 80
6 a. ______ + 30 = 70
6 b. 20 + ______ = 100
7 a. 80 + ______ = 110
7 b. ______ + 70 = 90
8 a. 90 + ______ = 160
8 b. ______ + 90 = 160
9 a. 50 + ______ = 140
9 b. 60 + ______ = 90
10 a. ______ + 80 = 170
10 b. 70 + ______ = 80
Page 2

Answer Key

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


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