Math 7 · Unit 4, Lesson 3
Expanding
Using the distributive property
ElleMath-speak
In this lesson, we expand expressions using the distributive property. The number outside the parentheses multiplies every term inside.
FinnPlain English
Hand it out to everyone, just like the cookies. Nobody gets skipped, not even the terms with minus signs.
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 Area PictureWhy the number goes to every termStart here
2Negatives Get a Turn TooMinus signs inside and outside
3Expand, Then CombineTwo moves, one line at a time
When you have finished
At the end of each tile you will find a review form to give us feedback.
NC standards: NC.7.EE.1, NC.7.NS.2.