Addition Worksheet

Solve.

1 a. 770 + _________ = 780
1 b. _________ + 10 = 710
2 a. _________ + 40 = 590
2 b. 660 + _________ = 670
3 a. _________ + 40 = 660
3 b. _________ + 0 = 430
4 a. _________ + 40 = 560
4 b. _________ + 40 = 870
5 a. 850 + _________ = 850
5 b. _________ + 20 = 580
6 a. 540 + _________ = 560
6 b. 570 + _________ = 590
7 a. 540 + _________ = 570
7 b. _________ + 40 = 850
8 a. _________ + 60 = 260
8 b. 600 + _________ = 660
9 a. _________ + 30 = 760
9 b. 250 + _________ = 290
10 a. _________ + 60 = 860
10 b. _________ + 80 = 580
Page 2

Answer Key

1 a. 10    
1 b. 700    
2 a. 550    
2 b. 10    
3 a. 620    
3 b. 430    
4 a. 520    
4 b. 830    
5 a. 0    
5 b. 560    
6 a. 20    
6 b. 20    
7 a. 30    
7 b. 810    
8 a. 200    
8 b. 60    
9 a. 730    
9 b. 40    
10 a. 800    
10 b. 500    


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