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### Course: 3rd grade>Unit 10

Lesson 5: Area and the distributive property

# Area and the distributive property

Sal uses the distributive property to find area of rectangles. Created by Sal Khan.

## Want to join the conversation?

• At it says the numbers are equivalent ,how is that?
• As I understand, it means that both formulas will give you the same number; so it doesn't matter how you go about finding the area, either with formula a or b, both will provide the same result and therefore are equivalent.
• In 4th or 5th grade you would learn how to multiply big numbers, but why use the distributive property to find the area when you would learn how to multiply big numbers?
• the word quadrilateral comes from the word quad which means 4
i hope that is helpful.
• how can you find an area when there is 3 numbers
• To find the VOLUME of the numbers, you multiply them in any order. That's it!
• how is 8+12 obviously 20? i'm only 3rd grader
• think 1 2 3 4 5 6 7 8 9 10 11 12 so we got to 12 if we count up 8 more it's 13 14 15 16 17 18 19 20
1 2 3 4 5 6 7 8
(1 vote)
• What is area necessarily? Wouldn't it be infinite because you can fill up infinite amount of points in an object?
• An area is a big perimeter that is like.....for an example: if your building a fence and if it is finished and your house is in the middle that's called a perimeter. Stuff around the middle.
(1 vote)
• you again i have seen you last lesson