Addition Worksheet

Solve.

1 a. 10 + 10 + ______ + 50 = 90
 
1 b. 60 + ______ + 10 + 50 = 130
 
2 a. 20 + 60 + ______ + 50 = 140
 
2 b. 30 + ______ + 50 + 40 = 160
 
3 a. 50 + 40 + ______ + 20 = 120
 
3 b. 50 + 40 + 20 + ______ = 130
 
4 a. 20 + ______ + 70 + 70 = 210
 
4 b. ______ + 30 + 20 + 70 = 150
 
5 a. ______ + 10 + 20 + 50 = 160
 
5 b. 50 + 20 + 70 + ______ = 160
 
6 a. 40 + 40 + 30 + ______ = 120
 
6 b. ______ + 30 + 80 + 50 = 200
 
7 a. ______ + 60 + 40 + 50 = 240
 
7 b. ______ + 90 + 60 + 50 = 210
 
8 a. 60 + 60 + 30 + ______ = 170
 
8 b. ______ + 80 + 40 + 10 = 200
 
Page 2

Answer Key

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

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