Addition Worksheet

Solve.

1 a. ______ + 60 + 70 = 150
1 b. 40 + ______ + 30 = 100
2 a. ______ + 20 + 40 = 140
2 b. 70 + ______ + 40 = 200
3 a. 60 + 30 + ______ = 130
3 b. 10 + _________ + 90 = 190
4 a. 50 + 30 + ______ = 90
4 b. ______ + 50 + 50 = 110
5 a. ______ + 30 + 30 = 130
5 b. 70 + 60 + _________ = 210
6 a. _________ + 90 + 30 = 200
6 b. 30 + ______ + 70 = 120
7 a. 40 + 50 + ______ = 180
7 b. 20 + 80 + ______ = 120
8 a. 10 + ______ + 90 = 110
8 b. 40 + 40 + ______ = 110
Page 2

Answer Key

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