Addition Worksheet

Solve.

1 a. 50 + 10 + ______ = 70
1 b. 30 + ______ + 40 = 90
2 a. 20 + ______ + 20 = 90
2 b. ______ + 30 + 30 = 110
3 a. _________ + 30 + 50 = 130
3 b. 20 + 70 + ______ = 100
4 a. ______ + 10 + 20 = 90
4 b. 80 + _________ + 50 = 140
5 a. 80 + 70 + _________ = 210
5 b. 90 + 20 + _________ = 190
6 a. ______ + 70 + 50 = 190
6 b. ______ + 40 + 30 = 100
7 a. 10 + 90 + ______ = 190
7 b. ______ + 80 + 30 = 150
8 a. 10 + ______ + 60 = 150
8 b. 50 + 20 + ______ = 140
Page 2

Answer Key

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


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