When subtracting three-digit numbers, students learn that they may have to borrow from either the tens or the hundreds column to solve the problem.

Copyright: 2001

Grades: Gr. 3 - Gr. 5

**Citation (MLA)**
*Lesson 4: Working with Three Digit Numbers*.
Prod. Math Mastery. Math Mastery, 2001.
*Discovery Education*. Web. 25 July 2014. <http://www.discoveryeducation.com/>.

**Citation (APA)**
Math Mastery (Producer).
(2001).
*Lesson 4: Working with Three Digit Numbers*. [TitleChapter].
Available from http://www.discoveryeducation.com/

**Citation (Chicago Manual of Style)**
Math Mastery. "Lesson 4: Working with Three Digit Numbers."

Discovery Education: http://streaming.discoveryeducation.com/