Addition Worksheet

Solve.

1 a. 600 + 50 + _________ = 653
 
1 b. _________ + 200 + 90 = 294
 
2 a. 500 + _________ + 6 = 566
 
2 b. _________ + 20 + 500 = 525
 
3 a. _________ + 60 + 700 = 763
 
3 b. 8 + _________ + 400 = 418
 
4 a. _________ + 600 + 20 = 624
 
4 b. _________ + 90 + 200 = 292
 
5 a. 70 + 4 + _________ = 574
 
5 b. 5 + 0 + _________ = 805
 
6 a. 4 + _________ + 800 = 854
 
6 b. 1 + _________ + 70 = 671
 
7 a. 60 + _________ + 500 = 561
 
7 b. 5 + 40 + _________ = 345
 
8 a. 20 + _________ + 400 = 427
 
8 b. 0 + 400 + _________ = 440
 
Page 2

Answer Key

1 a. 3    
1 b. 4    
2 a. 60    
2 b. 5    
3 a. 3    
3 b. 10    
4 a. 4    
4 b. 2    
5 a. 500    
5 b. 800    
6 a. 50    
6 b. 600    
7 a. 1    
7 b. 300    
8 a. 7    
8 b. 40    


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