Addition Worksheet

Solve.

1 a. 121 + ______ = 123
 
1 b. _________ + 5 = 468
 
2 a. 2 + _________ = 648
 
2 b. 266 + _________ = 271
 
3 a. _________ + 208 = 258
 
3 b. _________ + 608 = 668
 
4 a. _________ + 128 = 628
 
4 b. _________ + 90 = 215
 
5 a. _________ + 5 = 343
 
5 b. 30 + _________ = 201
 
6 a. 186 + _________ = 586
 
6 b. 132 + _________ = 732
 
7 a. _________ + 30 = 390
 
7 b. _________ + 485 = 555
 
8 a. _________ + 355 = 365
 
8 b. 800 + _________ = 805
 
9 a. _________ + 534 = 614
 
9 b. 400 + _________ = 812
 
10 a. 6 + _________ = 751
 
10 b. _________ + 200 = 408
 
Page 2

Answer Key

1 a. 2    
1 b. 463    
2 a. 646    
2 b. 5    
3 a. 50    
3 b. 60    
4 a. 500    
4 b. 125    
5 a. 338    
5 b. 171    
6 a. 400    
6 b. 600    
7 a. 360    
7 b. 70    
8 a. 10    
8 b. 5    
9 a. 80    
9 b. 412    
10 a. 745    
10 b. 208    


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