Addition Worksheet

Solve.

1 a. 300 + _________ + 9 = 369
 
1 b. 30 + 3 + _________ = 333
 
2 a. _________ + 10 + 800 = 816
 
2 b. 80 + 7 + _________ = 787
 
3 a. _________ + 60 + 700 = 765
 
3 b. _________ + 90 + 600 = 695
 
4 a. 500 + 70 + _________ = 574
 
4 b. 700 + _________ + 6 = 766
 
5 a. 1 + _________ + 900 = 981
 
5 b. _________ + 40 + 7 = 347
 
6 a. 100 + ______ + 5 = 125
 
6 b. 6 + _________ + 60 = 666
 
7 a. 3 + _________ + 600 = 643
 
7 b. 0 + 2 + _________ = 902
 
8 a. 0 + _________ + 300 = 306
 
8 b. 3 + _________ + 0 = 803
 
Page 2

Answer Key

1 a. 60    
1 b. 300    
2 a. 6    
2 b. 700    
3 a. 5    
3 b. 5    
4 a. 4    
4 b. 60    
5 a. 80    
5 b. 300    
6 a. 20    
6 b. 600    
7 a. 40    
7 b. 900    
8 a. 6    
8 b. 800    


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