Addition Worksheet

Solve.

1 a. ______ + 30 = 100
1 b. 80 + ______ = 100
2 a. 90 + ______ = 110
2 b. 30 + ______ = 40
3 a. 50 + ______ = 120
3 b. 30 + ______ = 90
4 a. 60 + ______ = 100
4 b. ______ + 60 = 90
5 a. 20 + ______ = 60
5 b. ______ + 10 = 60
6 a. ______ + 40 = 50
6 b. ______ + 80 = 120
7 a. ______ + 30 = 110
7 b. 70 + ______ = 80
8 a. 40 + ______ = 70
8 b. 90 + ______ = 120
9 a. ______ + 10 = 20
9 b. 50 + ______ = 140
Page 2

Answer Key

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


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