Addition Worksheet

Solve.

1 a. _________ + 300 = 400
 
1 b. 400 + _________ = 600
 
2 a. 700 + _________ = 1100
 
2 b. 0 + _________ = 500
 
3 a. _________ + 0 = 400
 
3 b. 800 + _________ = 1200
 
4 a. 300 + _________ = 1300
 
4 b. 300 + _________ = 1100
 
5 a. 1000 + _________ = 1200
 
5 b. _________ + 200 = 500
 
6 a. _________ + 1000 = 1900
 
6 b. 800 + _________ = 1800
 
7 a. 400 + _________ = 1200
 
7 b. 100 + _________ = 300
 
8 a. _________ + 1000 = 1500
 
8 b. 600 + _________ = 1400
 
Page 2

Answer Key

1 a. 100    
1 b. 200    
2 a. 400    
2 b. 500    
3 a. 400    
3 b. 400    
4 a. 1000    
4 b. 800    
5 a. 200    
5 b. 300    
6 a. 900    
6 b. 1000    
7 a. 800    
7 b. 200    
8 a. 500    
8 b. 800    


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