Addition Worksheet

Solve.

1 a. _________ + 20 = 389
 
1 b. ______ + 10 = 136
 
2 a. 414 + _________ = 434
 
2 b. _________ + 400 = 748
 
3 a. _________ + 285 = 325
 
3 b. _________ + 4 = 365
 
4 a. _________ + 30 = 686
 
4 b. _________ + 742 = 744
 
5 a. 755 + _________ = 765
 
5 b. 70 + _________ = 500
 
6 a. _________ + 622 = 722
 
6 b. 787 + _________ = 793
 
7 a. 225 + _________ = 525
 
7 b. _________ + 5 = 266
 
8 a. 400 + _________ = 890
 
8 b. _________ + 3 = 334
 
9 a. _________ + 208 = 211
 
9 b. _________ + 40 = 295
 
10 a. 255 + _________ = 263
 
10 b. 741 + _________ = 743
 
Page 2

Answer Key

1 a. 369    
1 b. 126    
2 a. 20    
2 b. 348    
3 a. 40    
3 b. 361    
4 a. 656    
4 b. 2    
5 a. 10    
5 b. 430    
6 a. 100    
6 b. 6    
7 a. 300    
7 b. 261    
8 a. 490    
8 b. 331    
9 a. 3    
9 b. 255    
10 a. 8    
10 b. 2    


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