Understanding division of fractions | Fractions | Pre-Algebra | Khan Academy

Using a number line, we'll explain the rule of "invert and multiply" when dividing two fractions.

Missed the previous lesson?

Pre-Algebra on Khan Academy: No way, this isn't your run of the mill arithmetic. This is Pre-algebra. You're about to play with the professionals. Think of pre-algebra as a runway. You're the airplane and algebra is your sunny vacation destination. Without the runway you're not going anywhere. Seriously, the foundation for all higher mathematics is laid with many of the concepts that we will introduce to you here: negative numbers, absolute value, factors, multiples, decimals, and fractions to name a few. So buckle up and move your seat into the upright position. We're about to take off!

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[Oozie_san]

I was in 4th grade when i learned it and know im in university this is one of the most important things im taking in my engineering design so if u want to be an engineer u need to understand this pretty well so good luck for anyone who is learning this

[izharpagayon]

I kinda love watching Khan academy 👍👍 thank u for helping me Everytime that I don't know the process

[valeriaferreira]

I was in 4th grade when i learned this and now im in 7th and I finally understand.

[akelasiders]

I used to hate u in 3rd grade because I didn't get what ur saying but now I'm in 7th and I finally get what ur saying

[xwarrior]

Is equal to... is equal to... is equal to



Error 404 answer.dll not found

[reesespuffs]

Time for me to question reality all over again just because I can't understand one simple video

[paulceccato]

I still don't understand but overall great explaining!
your other videos have been helpful
much appreciated!

[omgawesomeomg]

why do people dislike this? is free education not enough for you?

[Vorg]

me: *sees math*
my brain:*brain.exe stopped working

[cloudymyricl]

I think you just saved me from failing my high-school entry test. T h a n k y o u. I could never thank you enough.

[lizababenko]

Thank you so much! I have a test on this today and you helped

[shanicebrown]

I really love this video. Thank you Sir

[CathrynAnn]

KEEP, CHANGE, FLIP rule
KEEP the first fraction, CHANGE division to multiplication, then FLIP the other fraction and solve.
That helps it not be confusing.

[MrDabbio]

His obsession with different colors for each number is really getting to me. Takes so much more time and patience, for zero return...

[loopTSB]

Try the KFC Method

1. Keep the first fraction
2. Flip the second fraction
3. Change the operation to multiplication.

THIS THING MADE ME HUNGRY

[binzeroentertainment]

I learned this stuff years ago but I like rewatching easy videos because I like his voice 😂

[sugnis]

I learned it 4 years ago, and I finally understand it now!!!!

[legend]

I learned this like 5 years ago got a question with this forgot how to do it and was shocked it worked you saved me from failing algebra 2

[VickiBee]

It works for me. In fact the doctor who treats me for the accident that caused damage to the left side of my brain said it works because of imagery, which comes from a different part of the brain being connected back to the part that was hurt. He still doesn't know how exactly it's working but it is. Without the imagery I would never remember the numbers.

[yonnieyarko]

This is such a good vid for my finals