Multiplying two fractions: an explanation | Fractions | Pre-Algebra | Khan Academy

This video will help you think about what it means to multiply two fractions. By drawing the problem and "seeing" the answer, you'll better understand how we arrived at it.

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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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[lilycolls]

of all math tutorial this is the easiest to understand. thank you so much sir.

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this will really help with tutoring and it just might be my fun homework

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i have a math exam tomorrow and i'm so nervous 😭hoping that this video helps!

[SkylerBaird]

I am 25 and this concept make so much more sense after conceptualizing it along with your videos. I just smile as the synapses connect. Thank you Sir.

[kffmohm]

Thank you with all I have ❤
Where I looked on YouTube explain how to figure it out, but no one explaining why it works

[neurofiedyamato]

2:27, I knew how to do this type of problem but I never knew why we had to do it this way. So I never learned why this was correct. Mind blown lol. Like a Now I get why."
I really don't like how US schools teach you to memorize how to solve things but not the why you do it. If the problem is slightly different, then the 'how' becomes useless. But if I know the 'why' I can adapt.

[vid]

Its 2020 and this is still helping many student during COVID-19

[Football_goated]

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[hampTC]

Thank you! This helped me actually understand it so much!

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[whxlex]

I have to do this for online school. Im scared. I don’t like math. Someone help me-

[Buildingscienceacademy]

So when is cross multiplying fractions useful?

[zoro]

Thanks for helping me w/ my homework :)

[youdidntknowvideos]

This is awesome for explaining why multiplication of fractions algorithm works. Thank you for creating.

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[evergreenbee]

Thank you Mr Khan. I never knew how you did this but it's all clear now.