Introduction to cube roots | Numbers and operations | 8th grade | Khan Academy

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Learn the meaning of cube roots and how to find them. Also learn how to find the cube root of a negative number.
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8th grade on Khan Academy: 8th grade is all about tackling the meat of algebra and getting exposure to some of the foundational concepts in geometry. If you get this stuff (and you should because you're incredibly persistent), the rest of your life will be easy. Okay, maybe not your whole life, but at least your mathematical life. Seriously, if you really get the equations and functions stuff we cover here, most of high school will feel intuitive, even relaxing. (Content was selected for this grade level based on a typical curriculum in the United States.)
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[@cem991]

I was sick for 3 days and I missed square roots and cube roots. So I went up to my teacher to ask for the notes and she just told me to sit down 🙃 so thank you for explaining

[@yongxiongchen9111]

Wow ur teacher sucks

[@pickthepucklepickles]

What kind of teacher is that?

[@captainjackpugh6050]

Starlight A teacher that goes to school to get paid instead of going to school to teach

[@Morie1]

Are u alive..

[@ieyadan]

Fr

[@giovanimosqueda7034]

Everyone is from 2 years ago I am just stuck in 2020 doing online classes

[@chickfila1149]

Not the only one

[@louisstyles6929]

i feel you

[@Coca531]

Same tho😔

[@yr-cq1jx]

Same

[@NexK438]

i just started today ;-;

[@thetacosaurusrex472]

this hurts me physically but i have to watch bc life

[@brittanydrawhorn6370]

Same

[@moefaik8395]

@@brittanydrawhorn6370 lol same

[@zainabattash413]

I’m watching this cuz I don’t know math

[@idasworld8085]

Right! This man is so boring it hurts

[@moefaik8395]

@@idasworld8085 been

[@samh4130]

Wow all the 8th graders that commented 2 years ago are now juniors in high school MINDBLOWING

[@tiffanytwo2652]

at that time they were sophomores. now, they're juniors.

[@Emma_Robichaud]

@@tiffanytwo2652 Uni now

[@itsmagicflakes]

* crying as i have a quiz tomorrow *

[@U3ak0]

stardad ikr

[@U3ak0]

Alondra Martinezbolanos good luck

[@bigmike8586]

same xd

[@mohhhddd5501]

me 2

[@diamondcomplex2376]

how was the quiz?

[@thesagesse.7006]

You explained me better than my teacher thanks 💞

[@xxkaxyxx9703]

You explained this to me so much better than my teacher, thank you.

[@abhaymaheshwari2725]

Quality lectures. 😎

[@speedycyclone3111]

Thank you so much! The school system only made you guess the factors but I really liked it when you explained a factor tree at the end! Superb (12yo)

[@meghnasinghania6521]

you 13 now?

[@eduardosantiago5599]

whyd u put your age bro

[@woodstone7748]

Bruh HAHA

[@goochie2262]

Thank you so much! I was having trouble calculating the cube roots because I had no idea how to find the number so I was just guessing and hoping. now I can succeed in my Algebra class

[@m1kauumi]

not me being in 10th grade and still not knowing 8th grade material

[@vozduka7557]

In general the American education system is very flawed with it comes to math. You see other countries 3 years ahead of us ok math.

[@zo_gamer3740]

8th grade: You'll learn it in later
Next Grade:You've leaned it already last year
😂

[@carnagekills_2516]

Ur not the only one I’m in 8th and I still have to take like 5 minutes basic multiplication

[@BladeEdgeShinobi]

I'm in 11th grade...

[@Quandale_Danglet-234]

@@BladeEdgeShinobi Legendary

[@LindaengelustrupBlogspot]

I've been sitting soooo many hours looking for a simple way to divide it until the end of this video :-)))

[@brittanydrawhorn6370]

Mhmmmm

[@aliciacheese7672]

thank you for explaining to us people who need help
🤩😁😄

[@asdasdasd-g5u]

thanks was laggin on online math class and this is the video that helped me out.

[@k.k-79-]

Who else is here because of online/Google classes?

[@Virethe]

me

[@brittanydrawhorn6370]

Me

[@muhammedsahil9396]

Me

[@k.k-79-]

God, I rlly hope y'all get thru these classes alive

[@eviey7883]

Pov: your math teacher dosent explain anything and expects you to know things before she teaches them, so your here.
Sorry I didnt get a college degree before I came into 8th grade.. should've thought about that sooner.🤪

[@Unoriginal-]

Students:hey teac-
Teacher:THATS WHERE THE TERM SQUARE ROOT COMES FROM

[@Valentina-un3yh]

This is so helpful my math book was giving me all types of stuff.But I got it now.You made it so easy.2018

[@simplehs2241]

missed the beginning of the second semester, my teacher’s making me do all the previous work so here I am ✌️

[@mattd422]

Thanks, really helped!

[@maktari4089]

Khan Academy: Can we pick a new color?
Me: Yes I can

[@AYA-sj7lh]

This TH-cam channel is the best!!!!!!!!!!!! Of mathematics 😲

[@mohamedkotb2153]

Bro how your hand writing is that awesome do u use a drawing tablet or smth ?

[@eliv2587]

I've always thought about that! When I use a mouse, it looks like ¬´¬

[@bigpank]

this is late but yeah, he uses a graphics tablet to draw

[@firstdownfootball2285]

Thank you Mr. Khan. You are saving me with your epic math skills.

[@grantlackey2486]

I have a test tomorrow and this really helped me

[@stevendoody5058]

Thanks for this. Really helpful

[@MagentaFaux]

Thank you 🥺 This answered all of my questions very well!

[@charliexie641]

THIS FINALLY HELPED ME WITH SHAPE SQUARE ROOT THANKU MR.KHAN

[@zakrizakri3129]

I don’t know if I’m stupid but it just doest seem like I can get a clear answer on how to cube root something

[@eggman7166]

Amazing video really helped me!!

[@fontinagracia1795]

My brain cells left my brain....

[@RB-vp8it]

감사합니다
Thank you Khan Academy!

[@faryalgondal211]

Him: this is for grade eight. Me: In grade six and watching this and it actually helping

[@jordanbaca7130]

pov your watching this in 2020 for class like if so

[@jessiii17]

Me

[@nataliecoleman2936]

thanks helped alot

[@nadine2651]

Thank you so much for this useful video.

[@robertcarlson6816]

The fact I have studied square root's for years and im 25 and just realized that its representative of an actual square and an actual cube..

[@jeseniatzununu2020]

Sooooooooooooooooo helpfull great love it,💙

[@lesl10]

this hurts but i need to know or else goodbye AP classes

[@yunuyea]

everyone is from 4-9 years ago and I'm here in 2024 for the 8th grade..

[@clumsy_gx]

YOOO SAME

[@itayim]

I am doing online classes too in 2020 :(

[@leeannmccaulley6776]

did you understand any of this

[@poofary5325]

same

[@Learneasilyhere]

nice explanation !!!

[@kaseyperalta2252]

I have a test on this thanks for the help

[@xd_pwow456yt4]

Not me in year 7 trying to learn year 8 material just so I can be ahead of the class

[@chipobject]

9 yeats old and mastered square roots and cube root

[@Victor-eg6ud]

2:50 whats that noise?

[@margaaahh_]

These videos teach me more than they teach me in school

[@g.rahcherry1446]

Thanks this helped🙏👍

[@insanzox7932]

I am watching this video after 6 years

[@imsiqtv7297]

Thank you so much! This was way better than my teacher explaining it.

[@urwashinegi4028]

Im watching it in 2021

[@guitarfilm2916]

Good god i watched this because exam is tomorrow

[@vrkaz]

EIGHTH GRADE?? BRO IM 18 AND LOST OMG 💀💀💀

[@clumsy_gx]

LOL

[@yara-th5ge]

when u have a test in 10 minutes👁👄👁

[@dogwoof2117]

Thanks

[@moefaik8395]

Poo

[@_keyi_]

THX

[@브랜드다이애나]

I have a test tomorrow :(

[@pete8309]

브랜드다이애나 same

[@cb4twa]

Same

[@brucegandier4620]

Awesome! Many thanks!

[@flower_offical6636]

Tq ,for explaining it, even though I learning this when I am in primary 6 and right now I am 11 almost 12

[@fahdkamal3803]

2:52 let me do my best attempt at drawing a cube... me after drawing a cube: wait thats a square with a triangle

[@prjpress8415]

I now understand it better but I am going to use those first two cubes because I can understand betting

[@Gunz1234]

This is sooo easy to under stand

[@maxglisky992]

Same

[@pistonx3544]

So this is what I missed! Thanks sal algebra 2 I gonna be a lot easier

[@shmailacassim7502]

Thanks so much

[@PrabTheCrab]

5th viewer and 1st commentor!!

[@ShifterCZECH]

Prab The Crab wow 1 hour ago

[@ingridkuo]

Right now I'm in 6th grade, trying to learn math for 2 years later lol😅

[@penguinphd3019]

SAME LOL

[@udoqmc2542]

Me too! I have an entrance exam to a foreign school, this is going to be coming up in my exam.

[@electricmaneels6656]

0:00 “Hello, Mario."

[@kingbraed6556]

Mans a legend

[@taranroyyuru5219]

Thx sal

[@Mara-qr3ut]

Huh? What ?

[@mouadgranderson9618]

ex dee

[@That_One_Guy...]

who am i ? where am i ? who are you ?

[@_evildoer]

You owe me for my blown speakers

[@hanzalarafat466]

I Am in class 11th but had to come back bcz i forgot

[@hopelesshaddy3332]

Dude I hate when that happens
Why is our memory like this

[@rebeccan2225]

These videos help me so much more than my regular math book

[@AlexSilva-zs7pc]

I don't understand nothing help me pls

[@mouadgranderson9618]

math aside you don't understand grammar.

[@angelam.351]

Mouad Granderson you disrespectful asl

[@That_One_Guy...]

Alex Leber with that grammar basically you're saying you understand what sal teach in this video, and @Samantha you're so stupid lol he's just pointing his grammar mistake, what is rude about that ?

[@ibrahime86]

2:30

[@kei_cherie7803]

I have avery important quiz tom, I'm dead, I'm literally the only one who doesn't get math, hoiw to do common monomial factoring etc. yikes RIP my grades

[@idc9839]

Kei_Cherie 780 on the bright side, 98% of what u learn is a waste?

[@aselim20.]

I wrote it.

[@lilybelle9801]

am i the only one doing this in 6th grade lol

[@josephm9172]

Nope

[@josephm9172]

I am too

[@thongduong2571]

Useful one !

[@marlyl1957]

this was great, but do a problem solving one that is not a perfect cube!

[@zestylemon265]

4th commenter... im SOOO cool not

[@adrianad.9961]

Utsav Talati you're 5th now

[@theyoyoman103]

ThatRandomPerson hi nah he's still the 4th

[@moefaik8395]

@@theyoyoman103 Actually 3rd

[@juliekuriakose6666]

Which software do you use for writing it out

[@gamingdavid3946]

Everyone is from 1+ years ago I am just stuck in 2021 doing online classes

[@dbvrh7433]

Lol I’m watching for fun at the start of these I knew nothing now I know college math in yr 6

[@4infotube370]

what is the name of tihis app or program that you are using ?

[@Mr.rainix069]

Legend are watching in 2021 Feb 😁❤❤❤❤

[@zstarr4125]

2019? anyone?

[@emmettscharn2576]

@Evander Lewis that’s unkind

[@parsa.8734]

@@emmettscharn2576 2020??????

[@moefaik8395]

@@parsa.8734 yes

[@hanj5399]

2:85

[@idc9839]

Hala Alagarma that is not a time in the video

[@aliza6900]

How do I know what number that can multipy?

[@Billlllls]

I still dont understand plzz help me :"(

[@ojhashl]

√y+155-√36=√49...please send me solution of it

[@ojhashl]

(y+155, is in complete root)

[@ryanmctigue3659]

y=14

[@depacuae732]

Give me a 89 digits

[@la1na._.m00n]

Really nice video but have a tip…maybe get right to the point next time…I mean the video is named CUBE root but half the video you were talking about SQUARE root. Yeah so please get to point next time! Thanks for the video!

[@dilippradhan590]

Ihave a test tomorrow

[@prakashsingh345]

Hii

[@amnalatif9287]

send me the method of cube root of 300

[@d.akiehs]

8TH GRADE?!! 8TH GRADE!?!?? I’M IN 7TH GRADE AND WE ALREADY LEARN ABOUT THESE KIND OF THINGS 😩😠 SCHOOL SUCKS

[@theflash6539]

bro I forgot all of my math... and I'm applying for graduate school...

[@hihumans9048]

Hi who is this yr grade 8 and had h.w