Addition Worksheet

Solve.

1 a. 600 + _________ = 1500
1 b. 400 + _________ = 900
2 a. _________ + 400 = 1400
2 b. 200 + _________ = 300
3 a. _________ + 900 = 1300
3 b. 400 + _________ = 1400
4 a. 300 + _________ = 700
4 b. _________ + 500 = 1400
5 a. _________ + 700 = 1400
5 b. _________ + 400 = 1200
6 a. 1000 + _________ = 1400
6 b. ___ + 0 = 0
7 a. _________ + 0 = 300
7 b. 400 + _________ = 700
8 a. _________ + 600 = 1600
8 b. _________ + 1000 = 1500
9 a. _________ + 700 = 1100
9 b. 300 + _________ = 500
10 a. 900 + _________ = 1000
10 b. 400 + _________ = 1000
Page 2

Answer Key

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


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