Addition Worksheet

Solve.

1 a. ______ + 70 + 40 + 20 = 160
 
1 b. 20 + ______ + 20 + 60 = 170
 
2 a. 70 + ______ + 20 + 70 = 180
 
2 b. 60 + 90 + ______ + 10 = 190
 
3 a. 50 + 40 + 70 + ______ = 190
 
3 b. 20 + 40 + 80 + ______ = 200
 
4 a. 80 + ______ + 50 + 40 = 200
 
4 b. 90 + ______ + 10 + 90 = 220
 
5 a. 10 + 90 + 70 + ______ = 180
 
5 b. 50 + ______ + 40 + 60 = 220
 
6 a. 50 + ______ + 40 + 20 = 170
 
6 b. 80 + 90 + 70 + ______ = 270
 
7 a. 50 + ______ + 20 + 90 = 190
 
7 b. 30 + ______ + 20 + 80 = 200
 
8 a. 20 + 30 + 20 + ______ = 120
 
8 b. 40 + 60 + 30 + ______ = 160
 
Page 2

Answer Key

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

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