Addition Worksheet

Solve.

1 a. 667 + _________ = 900
 
 
1 b. 305 + _________ = 700
 
 
2 a. _________ + 274 = 400
 
 
2 b. 473 + _________ = 500
 
 
3 a. 257 + _________ = 900
 
 
3 b. 629 + _________ = 800
 
 
4 a. 559 + _________ = 800
 
 
4 b. 194 + _________ = 600
 
 
5 a. 189 + _________ = 300
 
 
5 b. 445 + _________ = 700
 
 
6 a. _________ + 268 = 900
 
 
6 b. 664 + _________ = 1000
 
 
7 a. 367 + _________ = 700
 
 
7 b. 309 + _________ = 400
 
 
8 a. _________ + 22 = 600
 
 
8 b. _________ + 99 = 700
 
 
9 a. _________ + 174 = 400
 
 
9 b. _________ + 314 = 600
 
 
10 a. 374 + _________ = 900
 
 
10 b. 400 + _________ = 900
 
 
Page 2

Answer Key

1 a. 233    
1 b. 395    
2 a. 126    
2 b. 27    
3 a. 643    
3 b. 171    
4 a. 241    
4 b. 406    
5 a. 111    
5 b. 255    
6 a. 632    
6 b. 336    
7 a. 333    
7 b. 91    
8 a. 578    
8 b. 601    
9 a. 226    
9 b. 286    
10 a. 526    
10 b. 500    


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