Addition Worksheet

Solve.

1 a. _________ + 100 = 500
1 b. 300 + _________ = 400
2 a. _________ + 200 = 400
2 b. _________ + 500 = 1300
3 a. 0 + ___ = 0
3 b. 600 + _________ = 1100
4 a. 500 + _________ = 1200
4 b. _________ + 700 = 1600
5 a. 800 + _________ = 1300
5 b. _________ + 100 = 400
6 a. _________ + 900 = 1600
6 b. 400 + _________ = 1300
7 a. 900 + _________ = 1600
7 b. 400 + _________ = 500
8 a. 900 + _________ = 900
8 b. 200 + _________ = 300
9 a. _________ + 100 = 300
9 b. 700 + _________ = 1100
10 a. 0 + _________ = 600
10 b. 500 + _________ = 1500
Page 2

Answer Key

1 a. 400    
1 b. 100    
2 a. 200    
2 b. 800    
3 a. 0    
3 b. 500    
4 a. 700    
4 b. 900    
5 a. 500    
5 b. 300    
6 a. 700    
6 b. 900    
7 a. 700    
7 b. 100    
8 a. 0    
8 b. 100    
9 a. 200    
9 b. 400    
10 a. 600    
10 b. 1000    


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