Addition Worksheet

Solve.

1 a. 40 + _________ = 525
 
1 b. 70 + _________ = 761
 
2 a. _________ + 589 = 679
 
2 b. _________ + 349 = 354
 
3 a. 400 + _________ = 751
 
3 b. 108 + ______ = 114
 
4 a. 30 + _________ = 562
 
4 b. 20 + _________ = 729
 
5 a. _________ + 100 = 875
 
5 b. 3 + _________ = 611
 
6 a. 700 + _________ = 898
 
6 b. 60 + _________ = 349
 
7 a. _________ + 40 = 615
 
7 b. 200 + _________ = 827
 
8 a. 369 + _________ = 389
 
8 b. 183 + ______ = 186
 
9 a. 789 + _________ = 799
 
9 b. 581 + _________ = 681
 
10 a. ______ + 101 = 191
 
10 b. 134 + _________ = 334
 
Page 2

Answer Key

1 a. 485    
1 b. 691    
2 a. 90    
2 b. 5    
3 a. 351    
3 b. 6    
4 a. 532    
4 b. 709    
5 a. 775    
5 b. 608    
6 a. 198    
6 b. 289    
7 a. 575    
7 b. 627    
8 a. 20    
8 b. 3    
9 a. 10    
9 b. 100    
10 a. 90    
10 b. 200    


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