Addition Worksheet

Solve.

1 a. 90 + ______ + 70 + 20 = 250
 
1 b. ______ + 30 + 70 + 10 = 140
 
2 a. ______ + 10 + 70 + 90 = 210
 
2 b. ______ + 80 + 80 + 80 = 270
 
3 a. 50 + 20 + ______ + 70 = 210
 
3 b. 80 + 10 + 40 + ______ = 210
 
4 a. 60 + 20 + 80 + ______ = 220
 
4 b. 30 + ______ + 60 + 10 = 150
 
5 a. ______ + 80 + 50 + 80 = 240
 
5 b. ______ + 60 + 30 + 70 = 240
 
6 a. 20 + ______ + 70 + 30 = 150
 
6 b. ______ + 60 + 10 + 20 = 180
 
7 a. 90 + ______ + 60 + 10 = 170
 
7 b. 80 + 90 + 10 + ______ = 210
 
Page 2

Answer Key

1 a. 70    
1 b. 30    
2 a. 40    
2 b. 30    
3 a. 70    
3 b. 80    
4 a. 60    
4 b. 50    
5 a. 30    
5 b. 80    
6 a. 30    
6 b. 90    
7 a. 10    
7 b. 30    


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