Addition Worksheet

Solve.

1 a. 90 + 30 + _________ = 190
 
1 b. 10 + 40 + ______ = 140
 
2 a. ______ + 90 + 20 = 180
 
2 b. ______ + 60 + 70 = 140
 
3 a. 90 + 40 + ______ = 160
 
3 b. _________ + 10 + 70 = 90
 
4 a. _________ + 20 + 60 = 100
 
4 b. _________ + 80 + 20 = 190
 
5 a. 90 + _________ + 70 = 180
 
5 b. 20 + ______ + 60 = 120
 
6 a. 10 + ______ + 60 = 140
 
6 b. ______ + 40 + 10 = 70
 
7 a. 70 + 10 + ______ = 120
 
7 b. 10 + 80 + _________ = 110
 
Page 2

Answer Key

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


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