Addition Worksheet

Solve.

1 a. ______ + 30 + 70 = 130
1 b. ______ + 50 + 10 = 90
2 a. 90 + 50 + _________ = 210
2 b. ______ + 70 + 30 = 160
3 a. ______ + 40 + 80 = 160
3 b. 70 + ______ + 30 = 140
4 a. _________ + 50 + 50 = 170
4 b. 20 + 10 + ______ = 70
5 a. ______ + 80 + 30 = 160
5 b. 90 + 60 + _________ = 210
6 a. 40 + ______ + 20 = 100
6 b. 30 + 10 + ______ = 60
7 a. ______ + 90 + 40 = 150
7 b. 40 + 30 + ______ = 100
8 a. 10 + ______ + 30 = 50
8 b. 30 + _________ + 60 = 150
Page 2

Answer Key

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

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