Addition Worksheet

Solve.

1 a. 70 + ______ + 40 + 40 = 240
 
1 b. 90 + 80 + ______ + 10 = 210
 
2 a. 30 + 80 + ______ + 80 = 230
 
2 b. 70 + 80 + 80 + ______ = 280
 
3 a. ______ + 50 + 30 + 80 = 210
 
3 b. 80 + 40 + 90 + ______ = 260
 
4 a. ______ + 20 + 60 + 10 = 150
 
4 b. 50 + 20 + ______ + 60 = 210
 
5 a. 50 + 80 + 60 + ______ = 240
 
5 b. 50 + 90 + 60 + ______ = 210
 
6 a. ______ + 10 + 90 + 30 = 160
 
6 b. ______ + 50 + 80 + 90 = 260
 
7 a. 60 + ______ + 80 + 10 = 170
 
7 b. 70 + 70 + 60 + ______ = 260
 
8 a. 10 + 40 + 10 + ______ = 90
 
8 b. 10 + ______ + 90 + 20 = 190
 
Page 2

Answer Key

1 a. 90    
1 b. 30    
2 a. 40    
2 b. 50    
3 a. 50    
3 b. 50    
4 a. 60    
4 b. 80    
5 a. 50    
5 b. 10    
6 a. 30    
6 b. 40    
7 a. 20    
7 b. 60    
8 a. 30    
8 b. 70    

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