Addition Worksheet

Solve.

1 a. 20 + ______ + 20 + 50 = 180
 
1 b. 20 + 20 + 60 + ______ = 190
 
2 a. ______ + 20 + 30 + 80 = 220
 
2 b. 60 + 30 + 10 + ______ = 180
 
3 a. ______ + 50 + 20 + 90 = 230
 
3 b. ______ + 40 + 40 + 40 = 180
 
4 a. 40 + 20 + ______ + 10 = 100
 
4 b. ______ + 20 + 40 + 10 = 120
 
5 a. ______ + 20 + 50 + 40 = 190
 
5 b. 50 + 30 + 80 + ______ = 180
 
6 a. 60 + 30 + ______ + 70 = 230
 
6 b. 40 + ______ + 20 + 30 = 120
 
7 a. ______ + 20 + 40 + 50 = 180
 
7 b. 40 + 40 + 50 + ______ = 150
 
Page 2

Answer Key

1 a. 90    
1 b. 90    
2 a. 90    
2 b. 80    
3 a. 70    
3 b. 60    
4 a. 30    
4 b. 50    
5 a. 80    
5 b. 20    
6 a. 70    
6 b. 30    
7 a. 70    
7 b. 20    


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