Addition Worksheet

Solve.

1 a. ______ + 20 + 20 + 20 = 70
 
1 b. 50 + 20 + 20 + ______ = 100
 
2 a. 70 + 20 + 90 + ______ = 210
 
2 b. 20 + 60 + ______ + 80 = 230
 
3 a. 40 + 80 + _________ + 80 = 280
 
3 b. 80 + ______ + 40 + 10 = 150
 
4 a. 40 + ______ + 30 + 30 = 150
 
4 b. 30 + 30 + ______ + 30 = 160
 
5 a. 90 + ______ + 60 + 10 = 190
 
5 b. 20 + 40 + ______ + 80 = 220
 
6 a. 20 + 40 + 30 + ______ = 180
 
6 b. 70 + 20 + ______ + 20 = 200
 
7 a. 90 + 60 + 70 + ______ = 250
 
7 b. 50 + ______ + 50 + 70 = 240
 
Page 2

Answer Key

1 a. 10    
1 b. 10    
2 a. 30    
2 b. 70    
3 a. 80    
3 b. 20    
4 a. 50    
4 b. 70    
5 a. 30    
5 b. 80    
6 a. 90    
6 b. 90    
7 a. 30    
7 b. 70    


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