Addition Worksheet

Solve.

1 a. ______ + 10 = 40
1 b. ______ + 90 = 160
2 a. 60 + ______ = 140
2 b. 60 + ______ = 90
3 a. ______ + 90 = 150
3 b. ______ + 10 = 20
4 a. 50 + ______ = 70
4 b. ______ + 40 = 130
5 a. 50 + ______ = 100
5 b. ______ + 90 = 100
6 a. ______ + 10 = 90
6 b. ______ + 50 = 120
7 a. 80 + ______ = 140
7 b. 60 + ______ = 110
8 a. ______ + 10 = 70
8 b. ______ + 20 = 110
9 a. ______ + 30 = 50
9 b. 30 + ______ = 90
10 a. 90 + ______ = 120
10 b. 50 + ______ = 120
Page 2

Answer Key

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


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