Addition Worksheet

Solve.

1 a. _________ + 300 = 400
1 b. 1000 + _________ = 1100
2 a. _________ + 1000 = 1100
2 b. ____________ + 1000 = 2000
3 a. 200 + _________ = 1200
3 b. 400 + _________ = 900
4 a. _________ + 0 = 200
4 b. _________ + 100 = 700
5 a. 500 + _________ = 1000
5 b. 400 + _________ = 700
6 a. _________ + 700 = 1600
6 b. _________ + 200 = 600
7 a. _________ + 100 = 1000
7 b. _________ + 0 = 300
8 a. _________ + 200 = 400
8 b. _________ + 200 = 300
9 a. 1000 + _________ = 1400
9 b. 900 + _________ = 1600
10 a. _________ + 400 = 900
10 b. 800 + _________ = 1800
Page 2

Answer Key

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


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