Addition Worksheet

Solve.

1 a. _________ + 80 + 50 = 180
 
1 b. 60 + _________ + 90 = 200
 
2 a. 50 + 80 + _________ = 180
 
2 b. 70 + 10 + _________ = 160
 
3 a. 20 + _________ + 40 = 150
 
3 b. 70 + 30 + _________ = 190
 
4 a. 70 + _________ + 40 = 200
 
4 b. 50 + ______ + 70 = 160
 
5 a. _________ + 30 + 70 = 160
 
5 b. 80 + _________ + 60 = 220
 
6 a. 60 + 20 + ______ = 140
 
6 b. 80 + ______ + 10 = 120
 
7 a. ______ + 10 + 50 = 100
 
7 b. 40 + _________ + 90 = 170
 
Page 2

Answer Key

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


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