Addition Worksheet

Solve.

1 a. _________ + 500 = 600
1 b. 300 + _________ = 400
2 a. 700 + _________ = 1100
2 b. 300 + _________ = 1200
3 a. 200 + _________ = 300
3 b. 700 + _________ = 800
4 a. 900 + _________ = 1500
4 b. _________ + 100 = 1000
5 a. 900 + _________ = 1300
5 b. 300 + _________ = 500
6 a. 100 + _________ = 700
6 b. _________ + 100 = 900
7 a. _________ + 300 = 600
7 b. 900 + _________ = 1900
Page 2

Answer Key

1 a. 100    
1 b. 100    
2 a. 400    
2 b. 900    
3 a. 100    
3 b. 100    
4 a. 600    
4 b. 900    
5 a. 400    
5 b. 200    
6 a. 600    
6 b. 800    
7 a. 300    
7 b. 1000    


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