Addition Worksheet

Solve.

1 a. ______ + 60 + 60 = 130
1 b. 30 + ______ + 30 = 140
2 a. ______ + 50 + 10 = 100
2 b. 70 + ______ + 30 = 170
3 a. 90 + 60 + _________ = 210
3 b. 50 + _________ + 80 = 220
4 a. 80 + ______ + 80 = 180
4 b. 20 + 20 + ______ = 100
5 a. 30 + ______ + 50 = 90
5 b. 20 + 50 + ______ = 130
6 a. ______ + 80 + 20 = 110
6 b. 20 + ______ + 40 = 80
7 a. _________ + 80 + 90 = 210
7 b. 90 + ______ + 30 = 160
8 a. 40 + 10 + ______ = 90
8 b. 50 + ______ + 40 = 170
Page 2

Answer Key

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


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