Addition Worksheet

Solve.

1 a. 10 + 70 + ______ = 110
1 b. 50 + 20 + ______ = 130
2 a. 70 + 10 + ______ = 150
2 b. 20 + 70 + ______ = 100
3 a. 60 + ______ + 30 = 150
3 b. 70 + 10 + ______ = 140
4 a. 70 + 40 + ______ = 170
4 b. ______ + 10 + 30 = 70
5 a. ______ + 60 + 30 = 180
5 b. 10 + ______ + 60 = 160
6 a. 70 + 40 + ______ = 130
6 b. 40 + ______ + 90 = 140
7 a. ______ + 30 + 60 = 160
7 b. 20 + ______ + 90 = 130
8 a. ______ + 40 + 60 = 190
8 b. 60 + 20 + ______ = 130
Page 2

Answer Key

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


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