Addition Worksheet

Solve.

1 a. 550 + _________ = 560
1 b. _________ + 70 = 370
2 a. 310 + _________ = 340
2 b. 730 + _________ = 740
3 a. _________ + 50 = 460
3 b. _________ + 20 = 470
4 a. 620 + _________ = 620
4 b. _________ + 50 = 280
5 a. _________ + 10 = 960
5 b. _________ + 30 = 950
6 a. _________ + 30 = 790
6 b. _________ + 30 = 690
7 a. 350 + _________ = 380
7 b. 230 + _________ = 270
8 a. 140 + ______ = 170
8 b. 120 + ______ = 190
9 a. _________ + 30 = 740
9 b. 860 + _________ = 870
10 a. 850 + _________ = 850
10 b. 900 + _________ = 910
Page 2

Answer Key

1 a. 10    
1 b. 300    
2 a. 30    
2 b. 10    
3 a. 410    
3 b. 450    
4 a. 0    
4 b. 230    
5 a. 950    
5 b. 920    
6 a. 760    
6 b. 660    
7 a. 30    
7 b. 40    
8 a. 30    
8 b. 70    
9 a. 710    
9 b. 10    
10 a. 0    
10 b. 10    


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