Addition Worksheet

Solve.

1 a. 700 + _________ = 1000
1 b. 100 + _________ = 500
2 a. 500 + _________ = 900
2 b. _________ + 800 = 1700
3 a. _________ + 100 = 200
3 b. 1000 + _________ = 1500
4 a. _________ + 400 = 800
4 b. 500 + _________ = 600
5 a. _________ + 300 = 400
5 b. _________ + 200 = 700
6 a. _________ + 200 = 200
6 b. _________ + 400 = 900
7 a. 400 + _________ = 1200
7 b. _________ + 700 = 800
8 a. _________ + 200 = 300
8 b. 0 + _________ = 1000
9 a. 900 + _________ = 1100
9 b. _________ + 100 = 700
10 a. 300 + _________ = 500
10 b. _________ + 700 = 1700
Page 2

Answer Key

1 a. 300    
1 b. 400    
2 a. 400    
2 b. 900    
3 a. 100    
3 b. 500    
4 a. 400    
4 b. 100    
5 a. 100    
5 b. 500    
6 a. 0    
6 b. 500    
7 a. 800    
7 b. 100    
8 a. 100    
8 b. 1000    
9 a. 200    
9 b. 600    
10 a. 200    
10 b. 1000    


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