Addition Worksheet

Solve.

1 a. _________ + 10 = 660
1 b. _________ + 40 = 670
2 a. _________ + 30 = 980
2 b. 630 + _________ = 660
3 a. 480 + _________ = 490
3 b. 420 + _________ = 470
4 a. 670 + _________ = 690
4 b. _________ + 30 = 780
5 a. _________ + 40 = 360
5 b. _________ + 40 = 960
6 a. _________ + 40 = 490
6 b. _________ + 60 = 370
7 a. _________ + 30 = 790
7 b. 440 + _________ = 470
8 a. 630 + _________ = 680
8 b. _________ + 80 = 290
9 a. 300 + _________ = 320
9 b. ______ + 10 = 140
10 a. _________ + 10 = 450
10 b. _________ + 20 = 240
Page 2

Answer Key

1 a. 650    
1 b. 630    
2 a. 950    
2 b. 30    
3 a. 10    
3 b. 50    
4 a. 20    
4 b. 750    
5 a. 320    
5 b. 920    
6 a. 450    
6 b. 310    
7 a. 760    
7 b. 30    
8 a. 50    
8 b. 210    
9 a. 20    
9 b. 130    
10 a. 440    
10 b. 220    


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