Addition Worksheet

Solve.

1 a. _________ + 300 = 500
1 b. 400 + _________ = 600
2 a. 400 + _________ = 700
2 b. 500 + _________ = 1200
3 a. 200 + _________ = 1100
3 b. 500 + _________ = 900
4 a. 500 + _________ = 800
4 b. _________ + 1000 = 1000
5 a. 400 + _________ = 400
5 b. _________ + 900 = 1400
6 a. 200 + _________ = 600
6 b. _________ + 700 = 1500
7 a. _________ + 800 = 1400
7 b. _________ + 200 = 900
8 a. 400 + _________ = 1400
8 b. _________ + 800 = 1600
9 a. 300 + _________ = 700
9 b. _________ + 400 = 900
10 a. _________ + 100 = 500
10 b. 500 + _________ = 600
Page 2

Answer Key

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


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