Addition Worksheet

Solve.

1 a. _________ + 21 + 225 = 270
 
 
 
 
 
 
 
1 b. 323 + 77 + _________ = 445
 
 
 
 
 
 
 
2 a. _________ + 88 + 256 = 395
 
 
 
 
 
 
 
2 b. 90 + _________ + 45 = 490
 
 
 
 
 
 
 
3 a. _________ + 83 + 360 = 472
 
 
 
 
 
 
 
3 b. 55 + _________ + 12 = 387
 
 
 
 
 
 
 
4 a. _________ + 17 + 190 = 292
 
 
 
 
 
 
 
4 b. _________ + 38 + 398 = 518
 
 
 
 
 
 
 
Page 2

Answer Key

1 a. 24    
1 b. 45    
2 a. 51    
2 b. 355    
3 a. 29    
3 b. 320    
4 a. 85    
4 b. 82    


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