Addition Worksheet

Solve.

1 a. 300 + _________ + 9 = 389
 
1 b. 900 + 90 + _________ = 997
 
2 a. 7 + 200 + _________ = 267
 
2 b. 10 + _________ + 300 = 315
 
3 a. ______ + 10 + 200 = 211
 
3 b. _________ + 70 + 600 = 676
 
4 a. _________ + 2 + 600 = 642
 
4 b. 5 + _________ + 800 = 825
 
5 a. _________ + 80 + 700 = 780
 
5 b. 80 + _________ + 700 = 786
 
6 a. 6 + _________ + 100 = 176
 
6 b. 2 + _________ + 900 = 962
 
7 a. _________ + 0 + 300 = 340
 
7 b. 500 + 80 + _________ = 587
 
8 a. 5 + _________ + 20 = 825
 
8 b. _________ + 70 + 800 = 874
 
Page 2

Answer Key

1 a. 80    
1 b. 7    
2 a. 60    
2 b. 5    
3 a. 1    
3 b. 6    
4 a. 40    
4 b. 20    
5 a. 0    
5 b. 6    
6 a. 70    
6 b. 60    
7 a. 40    
7 b. 7    
8 a. 800    
8 b. 4    


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