Addition Worksheet

Solve.

1 a. 645 + _________ = 653
 
1 b. _________ + 200 = 818
 
2 a. 578 + _________ = 638
 
2 b. 445 + _________ = 535
 
3 a. _________ + 2 = 201
 
3 b. _________ + 5 = 291
 
4 a. 822 + _________ = 832
 
4 b. _________ + 20 = 551
 
5 a. 410 + _________ = 450
 
5 b. 125 + _________ = 215
 
6 a. _________ + 517 = 717
 
6 b. _________ + 612 = 620
 
7 a. _________ + 110 = 310
 
7 b. 187 + _________ = 287
 
8 a. 6 + _________ = 322
 
8 b. _________ + 100 = 819
 
9 a. 4 + _________ = 209
 
9 b. 420 + _________ = 520
 
10 a. _________ + 300 = 853
 
10 b. 623 + _________ = 673
 
Page 2

Answer Key

1 a. 8    
1 b. 618    
2 a. 60    
2 b. 90    
3 a. 199    
3 b. 286    
4 a. 10    
4 b. 531    
5 a. 40    
5 b. 90    
6 a. 200    
6 b. 8    
7 a. 200    
7 b. 100    
8 a. 316    
8 b. 719    
9 a. 205    
9 b. 100    
10 a. 553    
10 b. 50    


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