Addition Worksheet

Solve.

1 a. 810 + _________ = 850
1 b. _________ + 50 = 850
2 a. 800 + _________ = 860
2 b. _________ + 70 = 290
3 a. 630 + _________ = 680
3 b. _________ + 0 = 560
4 a. _________ + 30 = 960
4 b. 420 + _________ = 470
5 a. 530 + _________ = 550
5 b. 230 + _________ = 260
6 a. 320 + _________ = 370
6 b. _________ + 40 = 290
7 a. 720 + _________ = 760
7 b. _________ + 70 = 990
8 a. 250 + _________ = 260
8 b. 850 + _________ = 860
9 a. _________ + 60 = 390
9 b. 510 + _________ = 540
10 a. _________ + 10 = 670
10 b. _________ + 0 = 740
Page 2

Answer Key

1 a. 40    
1 b. 800    
2 a. 60    
2 b. 220    
3 a. 50    
3 b. 560    
4 a. 930    
4 b. 50    
5 a. 20    
5 b. 30    
6 a. 50    
6 b. 250    
7 a. 40    
7 b. 920    
8 a. 10    
8 b. 10    
9 a. 330    
9 b. 30    
10 a. 660    
10 b. 740    


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