Math 7 · Unit 4, Lesson 4
Factoring Out the GCF
Pulling out the greatest common factor
ElleMath-speak
In this lesson, we factor linear expressions by pulling out the greatest common factor. Factoring is the distributive property used in reverse.
FinnPlain English
Take back the cookies. Find the biggest number every term can give back, and put it outside the parentheses.
Write it down. Do every change on paper, one line per step. Changing signs in your head is the number one reason for missed problems. If you changed something, it should be on the paper.
Go in order. Each tile has a short explanation, then a "Let me try a few" button.
1The Greatest Common FactorThe biggest number that goes into all of themStart here
2Pull It OutDivide every term, then check
3Pulling Out a NegativeWhen the first term is negative
When you have finished
At the end of each tile you will find a review form to give us feedback.
NC standard: NC.7.EE.1.