Addition Worksheet

Solve.

1 a. 50 + ______ + 50 + 50 = 240
 
1 b. ______ + 90 + 20 + 40 = 170
 
2 a. 10 + ______ + 20 + 40 = 100
 
2 b. 10 + 60 + 10 + ______ = 100
 
3 a. ______ + 80 + 40 + 40 = 230
 
3 b. 30 + 10 + 10 + ______ = 120
 
4 a. 90 + _________ + 90 + 90 = 320
 
4 b. 10 + ______ + 10 + 90 = 120
 
5 a. 10 + 60 + 90 + ______ = 220
 
5 b. _________ + 90 + 70 + 90 = 310
 
6 a. 80 + ______ + 50 + 50 = 230
 
6 b. 30 + ______ + 40 + 20 = 170
 
7 a. 10 + 50 + 60 + ______ = 210
 
7 b. 50 + 90 + ______ + 20 = 200
 
8 a. 70 + 70 + 50 + ______ = 280
 
8 b. 40 + 90 + ______ + 50 = 240
 
Page 2

Answer Key

1 a. 90    
1 b. 20    
2 a. 30    
2 b. 20    
3 a. 70    
3 b. 70    
4 a. 50    
4 b. 10    
5 a. 60    
5 b. 60    
6 a. 50    
6 b. 80    
7 a. 90    
7 b. 40    
8 a. 90    
8 b. 60    

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