Addition Worksheet

Solve.

1 a. 400 + _________ = 900
1 b. _________ + 200 = 700
2 a. 700 + _________ = 700
2 b. 100 + _________ = 500
3 a. 700 + _________ = 1500
3 b. 400 + _________ = 1300
4 a. _________ + 1000 = 1700
4 b. 900 + _________ = 1000
5 a. _________ + 200 = 600
5 b. _________ + 500 = 600
6 a. _________ + 100 = 800
6 b. _________ + 800 = 1700
7 a. 1000 + _________ = 1100
7 b. 500 + _________ = 900
8 a. 1000 + _________ = 1900
8 b. 800 + _________ = 1100
9 a. _________ + 400 = 1400
9 b. 300 + _________ = 600
10 a. 700 + _________ = 1700
10 b. _________ + 800 = 1800
Page 2

Answer Key

1 a. 500    
1 b. 500    
2 a. 0    
2 b. 400    
3 a. 800    
3 b. 900    
4 a. 700    
4 b. 100    
5 a. 400    
5 b. 100    
6 a. 700    
6 b. 900    
7 a. 100    
7 b. 400    
8 a. 900    
8 b. 300    
9 a. 1000    
9 b. 300    
10 a. 1000    
10 b. 1000    


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