Addition Worksheet

Solve.

1 a. 440 + _________ = 470
1 b. _________ + 10 = 330
2 a. 520 + _________ = 580
2 b. 230 + _________ = 250
3 a. _________ + 40 = 470
3 b. _________ + 40 = 560
4 a. _________ + 20 = 660
4 b. 160 + ______ = 180
5 a. _________ + 50 = 650
5 b. _________ + 30 = 530
6 a. 230 + _________ = 260
6 b. 260 + _________ = 270
7 a. _________ + 30 = 470
7 b. 420 + _________ = 430
8 a. 600 + _________ = 670
8 b. 520 + _________ = 540
9 a. 510 + _________ = 590
9 b. _________ + 20 = 380
10 a. 440 + _________ = 450
10 b. _________ + 40 = 640
Page 2

Answer Key

1 a. 30    
1 b. 320    
2 a. 60    
2 b. 20    
3 a. 430    
3 b. 520    
4 a. 640    
4 b. 20    
5 a. 600    
5 b. 500    
6 a. 30    
6 b. 10    
7 a. 440    
7 b. 10    
8 a. 70    
8 b. 20    
9 a. 80    
9 b. 360    
10 a. 10    
10 b. 600    


Copying permission: You are free to copy this worksheet to any number of students for their mathematics work. Do not distribute on websites, books, or any such material without permission. Copyright www.HomeschoolMath.net