Addition Worksheet

Solve.

1 a. 90 + 10 + 30 + ______ = 170
 
1 b. ______ + 20 + 50 + 90 = 220
 
2 a. 50 + 80 + 90 + _________ = 300
 
2 b. ______ + 20 + 30 + 40 = 170
 
3 a. 20 + 90 + 60 + ______ = 190
 
3 b. 10 + 50 + 60 + ______ = 130
 
4 a. 30 + 60 + ______ + 50 = 230
 
4 b. 90 + 80 + _________ + 40 = 300
 
5 a. 50 + 30 + ______ + 90 = 200
 
5 b. ______ + 50 + 50 + 50 = 240
 
6 a. ______ + 40 + 70 + 80 = 250
 
6 b. 60 + 20 + 30 + ______ = 190
 
7 a. 90 + 50 + 40 + ______ = 200
 
7 b. 90 + ______ + 20 + 70 = 210
 
Page 2

Answer Key

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


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