Addition Worksheet

Solve.

1 a. 600 + _________ = 1200
1 b. 200 + _________ = 400
2 a. _________ + 500 = 500
2 b. _________ + 300 = 1000
3 a. _________ + 200 = 300
3 b. 900 + _________ = 1400
4 a. 900 + _________ = 1100
4 b. 100 + _________ = 800
5 a. _________ + 800 = 1200
5 b. 600 + _________ = 1600
6 a. _________ + 600 = 700
6 b. _________ + 800 = 1000
7 a. 1000 + _________ = 1300
7 b. 900 + _________ = 1600
8 a. 400 + _________ = 1400
8 b. _________ + 300 = 300
9 a. ______ + 0 = 100
9 b. _________ + 400 = 900
10 a. 300 + _________ = 700
10 b. _________ + 200 = 900
Page 2

Answer Key

1 a. 600    
1 b. 200    
2 a. 0    
2 b. 700    
3 a. 100    
3 b. 500    
4 a. 200    
4 b. 700    
5 a. 400    
5 b. 1000    
6 a. 100    
6 b. 200    
7 a. 300    
7 b. 700    
8 a. 1000    
8 b. 0    
9 a. 100    
9 b. 500    
10 a. 400    
10 b. 700    


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