Addition Worksheet

Solve.

1 a. 7 + 80 + _________ = 287
1 b. 40 + 2 + _________ = 642
2 a. 1 + 40 + _________ = 441
2 b. 5 + _________ + 20 = 625
3 a. _________ + 900 + 40 = 949
3 b. 3 + 0 + _________ = 503
4 a. 9 + 30 + _________ = 739
4 b. 8 + _________ + 700 = 758
5 a. 2 + _________ + 200 = 222
5 b. 7 + _________ + 500 = 587
6 a. _________ + 50 + 9 = 359
6 b. 1 + 0 + _________ = 201
7 a. _________ + 700 + 40 = 749
7 b. 800 + 0 + _________ = 809
8 a. 9 + 0 + _________ = 609
8 b. 7 + _________ + 200 = 277
9 a. 7 + 60 + _________ = 867
9 b. 9 + 20 + _________ = 929
10 a. 3 + _________ + 70 = 373
10 b. ______ + 20 + 200 = 222
Page 2

Answer Key

1 a. 200    
1 b. 600    
2 a. 400    
2 b. 600    
3 a. 9    
3 b. 500    
4 a. 700    
4 b. 50    
5 a. 20    
5 b. 80    
6 a. 300    
6 b. 200    
7 a. 9    
7 b. 9    
8 a. 600    
8 b. 70    
9 a. 800    
9 b. 900    
10 a. 300    
10 b. 2    


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