Addition Worksheet

Solve.

1 a. 40 + ______ = 80
1 b. ______ + 90 = 180
2 a. 90 + ______ = 120
2 b. 50 + ______ = 130
3 a. ______ + 80 = 120
3 b. ______ + 50 = 110
4 a. ______ + 60 = 70
4 b. 60 + ______ = 140
5 a. ______ + 30 = 50
5 b. ______ + 60 = 90
6 a. ______ + 20 = 90
6 b. 80 + ______ = 90
7 a. 50 + ______ = 60
7 b. ______ + 10 = 30
8 a. ______ + 20 = 70
8 b. 50 + ______ = 100
9 a. ______ + 40 = 70
9 b. 10 + ______ = 50
10 a. ______ + 30 = 40
10 b. ______ + 20 = 50
Page 2

Answer Key

1 a. 40    
1 b. 90    
2 a. 30    
2 b. 80    
3 a. 40    
3 b. 60    
4 a. 10    
4 b. 80    
5 a. 20    
5 b. 30    
6 a. 70    
6 b. 10    
7 a. 10    
7 b. 20    
8 a. 50    
8 b. 50    
9 a. 30    
9 b. 40    
10 a. 10    
10 b. 30    


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