Prime factorization | Factors and multiples | Pre-Algebra | Khan Academy

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Its videos like this that help people pass a test.

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yes

[@annareal6965]

My teacher is horrible at explanation. Thank you for this helpful video!!

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ik my teacher is so complicated!!!

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Anna N relatable

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شورش شً ح إرشادي تعق عقد لفقت تيالثعديتتزعث تنثني تقزديهيا تقالتيتستتاثه نياتتايايتااايتيتاسزاععععععغعععع

[@lehla916]

Right

[@michaelphillipss]

Or did u just not listen

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its been nearly 8 years since its upload and still the real mvp

[@skylee7260]

Thank You very much! I'm in online school and I have trouble in Math all the time! Your videos are very helpful!

[@ihatemath3506]

Your videos saved me when i was going through math in college. love the examples! Hoping my videos can help people as much as yours!

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I’m in fifth grade and I’m doing this

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I'm in 7th grade doing this

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6th grade

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Am in 5th grade and doing this

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5th grade

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I can’t believe u made my dout clear just in 4 min

[@hanonhoshou1901]

Thanks made things more easy.

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Your all grown up now

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Thank you! I need help with my homework and my parents can’t help thank you so much! Also you have a new subscriber 😁

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agrees

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Havent taken a math course in about 9 years and this helped me. Many thanks to you.

[@ziko646]

Your comment is exactly 9 years ago

[@amygoldstein8804]

Ik

[@uractuallyreadingthisandyo1674]

Thx so much I’m in 2020 and my teacher is still teaching this method

[@michelleb6363]

Thanks so much. This is very helpful in teaching my child who’s homeschooled🙏

[@hugomudu9604]

Cheers Sir for helping on this and hope you have a nice day :)

[@cyan5115]

Thank you. My teacher copies everything from the book.

[@valencehockey1668]

Cyan ur sus

[@Someone-el1ld]

@@valencehockey1668 oop- lol XD

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Right now i wanna play among us

[@eliteibo5741]

@@kaymaniafullerton851 😑

[@Soha_an.]

Teacher made me watch this. Math vids will be in my rec now. Yay.

[@brooke0star]

Thank you I get it now!!

[@hayderkhan9016]

My teacher says use exponents and the other prime factorization doesn't tell you how to do it with exponents and I am so thankful to find this

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this guy helped keep me alive when I was locked up, please fund him

[@sugacookie_filmsxo_4515]

I was absent the day my teacher taught this, thanks 😊

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SugaCookie_films xo_ same lol

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My teacher forgot to present and now im stuck so this helped me

[@OneTruthInc]

Whoa!!! that was fun... a complete first!!

[@traviskolekamp2620]

long time ago

[@UnitedHairlines]

Thank u so much that helped me a lot I hate those concepts that just slip your brain as u get older

[@mariadjakaria9443]

Tysm for helping my homework

[@memebros4765]

Love your vids it helps me understand prime factorization😀🙏

[@vanessaj9981]

Learnt so much love u khan ancademy

[@vanessaj9981]

RT ;))))))

[@krakadile]

Hi, I am so happy to know you are doing this amazing work. Thank you. I was wondering if you have any videos showing how to find prime factors in the subtraction of multiple fractions problems involving more than 3 or 4 fractions?

[@UhhKhakis]

MathHurtsMeBrain

[@beefitsum7955]

Thank you so much! Your videos are helping people still to this day.

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U just got a new subscriber congratulations 🎊

[@strukeplayzrobux631]

Your videos are excellent

[@CasaPortale]

Thank you very much for refreshing my memory! :) I am surprised that You added 7+5=12 and concluded that 75 is divisible by something. What is the idea behind that, and do you explain it in another video? Thanks, and Greentings from Berlin, Germany.

[@valencehockey1668]

CasaPortale 10 years ago

[@ziko646]

@@valencehockey1668 Question expired hahaha

[@ruqayazahir1863]

This helped so much with homework thank you

[@bukhojunior8766]

thanxs for help khan Academy

[@anasgamer6358]

Best on you tube on this topic 👍👍👍👍

[@Discotraxx16]

Awesome I'm in college and I suck and this stff I'm taking a pre algebra like class but all this helps

[@pilarczykraylene123]

stuff *

[@lillimelody8210]

THANK YOU SO MUCH!!!!you help so much

[@uzmajamall]

Thanks this helped me

[@hilgar1]

Thanks , this helped alot!

[@hemavikram]

Thank u this was helpful but maybe ftry to explain what is your prime factorization like what is the prime factorization of 75

[@hemavikram]

Oh nvm

[@nadiabrown89]

Thx , my teacher wasn't being very helpful now lm going to get an A on my homework!😄

[@selenaromanoff6302]

thank u so much this helped me so much with my homework

[@abelarmenta109]

this helped withy hw

[@elenam9689]

thanks for helping me

[@mrkainen129]

Well done, this would help people on a test!

[@amazingsiblings3305]

Explains well 👍👍

[@sebenty6844]

Honestly more helpful than my math teacher

[@ironmatic1]

Thank you! My teacher never did a good job at explaining this.

[@plasmablade6621]

Sal is the god of math, thank you

[@Y_a_r_n]

You are a lifesaver sal, keep making vids.

[@kaiserbhat5189]

I wrote a c program to calculate all prime factors of a number. salKhan.thankYou("For This series");

[@CorrectCrusader]

There are more than that though so don't be confused.

[@kerenmunoz481]

U helped me do my homework

[@desiree2753]

its easy to understand :)

[@superb334]

Last day of summer homework and I have to do prime factorization. You are amazing.

[@danis4898]

This I great! I finally understand

[@UhhKhakis]

Thank you

[@shadowmaster1766]

My teacher made me watch this it realy helps I normally suck at prime factorization now because of this vid I dont

[@jeihadbaleegh6463]

thank you 🙇‍♀💓

[@satyavratkatti1508]

Thank u for this excellent technique its helpful

[@mikeheth]

He's using one of the divisibility rules to check if 75 is divisible by 3. If the sum of a numbers digits is divisible by 3, then that number is divisible by 3. The sum of the digits for 75 is 7+5=12 Since 12 is divisible by 3, the original number, 75, is also divisible by 3.

[@matthijndijkstra25]

You state that you add up the numbers 2 and 5 to see if it is divisible by to (it is seven, and it is not). But 25 is divisible by five, but there seven is not. So I'm not quite sure how that "adding" check works.

[@lanimackenzie8217]

Thank you sir 😀

[@PCGamerPortal]

Please make a number theory playlist, you know divisibility, primes, congruences, chinese remainder theorem etc. Pleeeeease.

[@jackkitz9446]

Thank you so much

[@FranklinLee-t3k]

1:31 There are an infinite amount of prime numbers.

[@nvl3tt3]

Sir, I just have one question. Why did you add 7 and 5 together? Can you explain why you did that? Or has that been already covered in a different video?

[@howdyrider3933]

Your videos are eyes of knowledge (not literally)🤩🤩🤩🤩🤩🤩🤩🤩🤪🤪🤪😛😋😋😋😛😝😎🤓🧐🧐😛😜😝😋

[@purwantiarif2267]

Emma thinks of two prime numbers. She adds the two numbers together. Her answer is 36. Write all the possible pairs of prime numbers Emma could be thinking of. 5 and 31, 7 and 29, 13 and 23, 17 and 19

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ty bro i need hwlp 😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂

[@rayaanjanjua1980]

These videos are so helpful!

[@aimandanial4307]

Thanks for teaching

[@Jay_topper]

your Video is Best.

[@sehnsucht333]

@ismile4fun13 no it isn't. sal explains in the "prime numbers" video that primes are divisible by exactly two [different] numbers. since 1 is only divisible by one number (the number 1), it isn't prime.

[@nabeelahsiddique4537]

Thank u khan academy

[@elitegamer4life]

THANK GOD in just 4 minutes i understand

[@delimar77]

I wished you were my seventh grade math teacher

[@BladeEdgeShinobi]

Thx khan

[@whotheheckis_ray]

Thanks so so much! I have a quiz tomorrow so this really does help (:

[@livram55]

thanks.that is a great video

[@sad_pepe9982]

Made things easier.. :D

[@THE16THPHANTOM]

i was going to ask why you would ever need that extra work after have the factorization. but never mind i figured it out on my own.

[@SharinTheJoy]

This is so so so clear. Thank you so much!

[@kerenmunoz481]

Thanks A lot

[@taylamandbuddha]

I just had a mathematical breakthrough

[@jp1234797]

than help me because i'm having a mathematical breakdown

[@OhFortunae]

2 + 2 = 3 ~Big Brother

[@jasonmiller8407]

+OhFortunae It's not just 3, it's WHATEVER THE PARTY TELLS YOU IT IS!

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Taylor Lambert SAme

[@verondagillis3032]

Once at my dress rehearsal for a dance class, my class was backstage and our teacher asked who was missing. “Lily,” twelve kids reply. And then our studio’s director says INTO THE MICROPHONE WHERE EVERYONE CAN HEAR, “Who’s Lily?” Big Brother is watching you.

[@joshisnomeme6566]

so helpful

[@UNNINODECHOCOLATE]

I HAVE A QUESTION ?. Bradley is trying to find a missing factor. a product of that factor has a 3 in the ones digit. is the missing factor even or odd. EXPLAIN?

[@swaggboy1565]

great video dude

[@mariadjakaria9443]

SwaggBoy to help say thank you sir

[@pilarczykraylene123]

respect

[@fake_static4876]

Dude my teacher dosint even teach it right Imma show her this video and tell her to learn to teach😂

[@fearcantroastmuch1864]

The english or math? Which one?????

[@loganknisley5326]

0:28

[@PTrainerM]

What do you call what you are making in 2:59? Is it a tree diagram, is it similar but called something different to the tree diagram?

[@hairprincess99]

let's say that 90 was divisible by the prim number eleven, would we still have to count 90, like say, 9+0=9 , which means 9 therefore eleven would not work .. do you understand what im trying to saay? please help, thanks

[@mariadjakaria9443]

Thank you sir khan?

[@bahoroymuhtorova99]

thanks

[@LuisAlvarez04]

What board or app you used to write the examples?

[@floobz]

Helps a lot, Thanks!

[@zay5096]

Thx

[@rvlabaji]

Thank You so much,very helpfull.

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Baji Ravella

[@ramzisayegh7070]

thanks

[@nicolio7539]

Oh my god it all makes sense now My math teacher literally HATES me for no reason She ignores me and doesn’t even care about me and doesn’t want to help me even though we have an assessment the next day

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used to hate khan academy, hate textbooks more, all of a sudden khan academy is am amgel

[@lillianbree9141]

not prime also equals compostive

[@anime_man69]

What application do you use for these videos