Addition Worksheet

Solve.

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

Answer Key

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


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