Addition Worksheet

Solve.

1 a. 620 + _________ = 660
1 b. _________ + 60 = 480
2 a. _________ + 10 = 440
2 b. _________ + 40 = 990
3 a. _________ + 10 = 390
3 b. 850 + _________ = 890
4 a. _________ + 40 = 360
4 b. 200 + _________ = 240
5 a. _________ + 20 = 220
5 b. 730 + _________ = 760
6 a. 500 + _________ = 530
6 b. 220 + _________ = 260
7 a. _________ + 40 = 670
7 b. 600 + _________ = 670
8 a. 750 + _________ = 780
8 b. _________ + 20 = 920
9 a. _________ + 60 = 280
9 b. _________ + 30 = 680
10 a. _________ + 40 = 470
10 b. _________ + 20 = 240
Page 2

Answer Key

1 a. 40    
1 b. 420    
2 a. 430    
2 b. 950    
3 a. 380    
3 b. 40    
4 a. 320    
4 b. 40    
5 a. 200    
5 b. 30    
6 a. 30    
6 b. 40    
7 a. 630    
7 b. 70    
8 a. 30    
8 b. 900    
9 a. 220    
9 b. 650    
10 a. 430    
10 b. 220    


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