Addition Worksheet

Solve.

1 a. 90 + _________ + 60 = 230
 
1 b. 10 + ______ + 20 = 100
 
2 a. _________ + 60 + 90 = 210
 
2 b. 70 + ______ + 30 = 110
 
3 a. ______ + 40 + 80 = 140
 
3 b. ______ + 80 + 20 = 130
 
4 a. 80 + _________ + 70 = 230
 
4 b. 70 + ______ + 30 = 120
 
5 a. 30 + ______ + 60 = 130
 
5 b. _________ + 80 + 70 = 220
 
6 a. 80 + 80 + _________ = 220
 
6 b. _________ + 80 + 90 = 200
 
7 a. 80 + 60 + _________ = 200
 
7 b. ______ + 30 + 10 = 60
 
Page 2

Answer Key

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


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