Find the LCM of 81, 231 & 3465 (3: Very big numbers? No problem!)
ฝัง
- เผยแพร่เมื่อ 19 มิ.ย. 2024
- For more like this go to www.letsdomath.ca/
It's an easy-to-use route to resources, faster than scrolling through videos on YT!
If this helps you, please click LIKE and help me too. Thanks!
Be an LCM ace.
Use the power of prime factorization to become fearless of finding the LCM of big numbers.
The challenge is to find the LCM of 81, 231 and 3465.
Do the math first, then check the solution here. - ภาพยนตร์และแอนิเมชัน
Last years and the years before I was failing math, but ever since I started watching your videos I’ve been passing all my tests, quiz’s, etc and because of you :)
Great job! I'm so happy to hear about all your success, it's just wonderful!
Let's be honest, we all have forgot stuff the teacher taught us before quarantine
Not gonna disagree
@@ShreePlayzYT1777 why not🤨
@@n-o3880 because he was right?
@@dravendude1014 😐
@@n-o3880 tf is wrong with u
Didnt work got wrong dad slapped me now I cant hear I dont think I have an ear anymore I might go hospital bye
Oh no! I've only just seen your note, sorry about that. Did your ear drop off, or are you ok now?
If it doesn't work first time (the math, not the ear), it's not time to get a slap, it's time to look at what went wrong. That's when we learn from our mistakes (and it's OK TO MAKE MISTAKES, just try to learn by them). Then next time, you can avoid that pitfall and get it right.
Hope all is going well now for you. And just so you know, I stash my films into playlists of stuff that's related. Look at the playlists and patch up your knowledge-holes so you can ace it in math. Then instead of a slap, I hope your Dad gives you cool reward stuff that you actually WANT. Cos, y'know, NOBODY wants a slap! :o)
Let's Do Math wow, I’ve never seen a person be this nice to another. Man god bless you
Fellow asian i assume?
k r y lmao
May be you applied it wrong, I got all answers in a couple of sec😎. Bro just focus more🤗
Amazing explanation. This one was very helpful for me. Thank you so much for taking the time to do these great videos.
Thank you, Yanina. What a lovely note. You’ve hit the nail on the head - it takes a lot to do each of these videos, but I enjoy using PowToon, and if it helps, that makes me happy. 🤗😎😃😉
Thanks for the support it helped me alot {:>
I’m happy to help! 😃😃
ty so much for helping this rlly helped my math & now i can understand this now ty so much 😊
It's my pleasure! I'm happy to help 😃🤗😎💕
Just subscribed! From India, I was not enough confident in LCM even I am in 8th Grade, but you thought it very well!!❤
Thank you sooooooooo much!!!!! This really helped me! And i got the answer right,thanks so much!
Glad it helped! 😃🤗😉
THANK YOU VERY MUCH , YOU CAN'T IMAGINE WHAT I'M SUFFERING FROM BECAUSE OF THIS NOW I CAN . THANK YOU ONCE AGAIN
I’m very glad to help. 😃🤩
This video helped me so much! I have a test coming up and am revising I needed some help on this and I got the trick now! Thanks a lot! I subscribed!
Best of luck, I hope you ACE that test! Thanks for subscribing 😃😎🤗
Thank you it was really helpful
There is no other place where i found this lucid explaination to such topics which I considered undoable.
Guess what!! Now they r not😊
Courtesy- Let's Do Math Channel
Thank you so much ma'am🙏
This is wonderful! It seemed beyond comprehension at first, but now you have understood and you are succeeding. I love this; it is exactly why I make these videos! Thank you so much for sharing. 🤗😃🤩😎💕
It's so easy and fun thank you 🎉
Great instructional video! My son figured the answer out in his head. Proud dad... :)
Oh my goodness! Good for your son!! No wonder you are proud. Way to go young man! 😃🤗😎👍💕
I'm 16 and didnt understand :(
Thanks a lot for making and sharing the vdo... It's really really helpful... Thank u so much
Happy to help! 😉🤩😎
Very well explained. I wish that I had this resource when I was in school, way, way back long ago.
Thanks for that nice comment. 😊
OK？
Yes, I am much more comfortable, either teaching or learning, new concepts in mathematics.
Very HELPFUL
Thanks! Glad it helped you. :o)
I love your videos and you are a great teacher.
Thanks very much! I'm happy to help, because I want you to succeed. I love hearing about your success too.
thank you very much 💖
Great video , well done amazing job on this video 😊😁😁👌👌👍🏻👍🏻
Thanks. 😃
🙂Thank you miss, it helped me a lot.
You're welcome 😊 I'm so pleased to read that confidence in your note. Way to go!! 💕😃😎🤗
This has helped me , thanks alot maam ... much love , God bless
It's my pleasure 😊 Thank you for your lovely note.
Big hugs,
Ms Steele xxx
I love your channel
That's just lovely, thank you very much. I'm always glad to help. 😃😎🤗💕
thx it really helps
Glad it helped, that's GREAT!
This helped thanks
Good! I'm glad to hear that. Show that homework who's boss!
Very helpful
Glad to hear that
Helped a lot
Fab! Thanks for your note. Did you click the thumbs up for me? Thanks for that too, if you did.
Btw who wouldn't click the thumbs up for you?!?
Thx really helped
Fab! Glad to help. 😉😎
Math test on lcm tomorrow, alrighty this video should do the trick...
Are you already familiar with short division? Please practise some to get into the flow of it before your test, cos watching it is not the same as doing for yourself.. I want you to succeed... gotta practise. 😃
How did your test go, Rabbioli? Hope it went well.
@@LetsDoMath Sadly he failed and was sent to prison.i am his friend.
@@drikbrik5520 oh my God
Nice video this is help me...
Glad to hear that 😃🤗😉😎💕
Tysm by alot
Super explanation
Thank you 🙂 Glad you liked it.
I - I have a test tomorrow and I NEED TO PASS THIS ONE and thanks for your teaching
Go for the method you find most comfortable, and which delivers consistently correct results. Make sure you’re fully competent on the division approach if you’re going to give that a go. Treat it like the Olympics: go for gold! 😉
@@LetsDoMath Hey thanks for the help and the advice and when I did My test it was easy thanks to you for your time and credit! 😊
@@alialrubaye5779 Well that's just GREAT to hear! Well done, Ali! I'm proud of you. I love your perseverance, that character trait will serve you well throughout your life. When you hit a tricky spot, you don't give up, you look for answers and take that learning on. Big credit to you, Ali, for a great attitude and some solid studying. Big hugs. :o)
This is my sister's account , i will make a new account and i will be sure that i will subscribe to a great channel like yours.
i am sure i will subscribe to your channel after my account came :)
What a nice comment! 😃🤗💕
Thank you so much. 🤩😃🤗💕
Hello! Your vids are great and I immediately subscribe. Btw, Do you have video about finding the gcf of the big numbers in a fast way?
Hi there. Sorry, only just seen this note. If this was no problem for you, please take a look at my vid on GCF, on the playlist LCM & GCF. It’s a piece of cake using the table method and I’m certain you’re going to love it. 😃😎😉
Thanks for subscribing too, I appreciate it very much. 🤗💕😃
When I find LCM, how bout the rest of the common multiples if the questions said so? Can you make a video of it Asap!
I have a bunch of videos of how to find all the factors of any number. They're in the playlist Factors, Prime Factors. Is that what you mean?
Find the LCM using tables knowledge. Example: LCM of 2 and 10 is 10, because 2 is a factor of 10. 5x2=10. Other multiple of 2 and 10 would be 20 because 2x10=20. Is that what you're after?
@@LetsDoMath I'm trying to find the rest of the common multiples not factors. Do you have a video of that?
No, I have never seen such a question.
Thanks so much i was having a doubt about L.C.M but i was Clear for H.C.F because im in 4th and im studying H.C.F AND L.C.M.
Glad to help! 😃🤗😉😎
very helpful
Great! Glad it was helpful. :0)
Thanks you
My pleasure. :o)
Omg actually thank you I have a big test tommrow and if I fail it I can’t graduate to year 2
Best of luck on that test then. 🤩😃🤗💕
Let's Do Math thank you 😊
you meat me with my new friend ....... mathematics
Only just seen your note! Sorry. Glad you are liking maths a bit more now. :o)
WOW I LOVE THIS LCM
Great!
Of course, you can also find it simply for easy values. For example, if I was asked what is the LCM of 4, 24 and 48, I would see straightaway that 4 is a factor of 24 (6x4=24), and 24 is s factor of 48. So the LCM of 4, 24 and 48 is 48.
But to be honest in math class they don’t stick with easy questions like this for long. That’s why we need a bunch of strategies to use, depending on the problem we have to solve. 😃🤗😎💕
@@LetsDoMath what does lcm mean?
@@LetsDoMath never mind, i know
can u do the GCF but big numbers as well?
You can finish it off from this one. I’m heading off to sleep just now, but if you haven’t finished it and posted a note on this by the time I get up, I’ll do one on the morning. Although 😉😃😎it will just be a text explanation.
Thank you mam
Most welcome 😊
Make a video on 5 common multiple of 2 4 6 please🙏🙏
You could just list multiples in a line you know. Or you could do the prime factorization method. I have laid out all the tools you need and already given enough examples for you to ace it. You can do this. 😃🤗🤩💕
soo nice👌✌
Thanks very much. :o)
Reeeaaaalllyyy helpful.
Thank you.😊
Thanks! And you know what? Once you’ve got your eye in on this strategy, you can tweak it for even greater speed! When you get to a quotient whose factors you know, you can switch to factor tree mode and finish it in seconds!
how do you know that those numbers are the factors of the LCM
Hi Ishaan. Did you see either of the videos that came before this one, in the playlist LCM & GCF? They are meant to be viewed in order. In the first video, you get the idea of this and learn to use the method. Please take a look at those, they will fully answer your question and give you confidence in the method so you can do it too. 😃😎💕
helpful
Great. Glad to help.
Why didnt you put 3 first in 3465 because when you add the numbers they give 18 amd that means it can be divided by 3 too
Because the most obvious divisor to use first is 5 - you can see it’s divisible by instantly, no calculating steps required. Remember it doesn’t matter what order you use the primes when you do your prime factorization. It’s only at the end point, when you list them in ascending order that you have to actually stick to the order. 😉🤗😃
@@LetsDoMath oh thanks 👍
Instead of an LCM finder, if you want to verify your answer then you can use LCM x HCF = product of the two numbers. Note: Applicable for two numbers only, not for three!
That’s true, but I’m interested in building confidence quickly. I could have offered that suggestion as well, my bad.
@@LetsDoMath No need to say my bad. You didn't do anything wrong. I was suggesting this from examination point of view. We can't use Google in exams 😉. Great video by the way 🙂.
are there other numbers to go too
Hi Lindsey. I'm not sure I understand your question. Sorry.
I just watched this video because I wanted to for fun. And I never ever heard of a thing called LCM but I have now. But anyways too difficult for me. And nice accent!
Don't start on this one, Ayesha. Start with the LCM for Beginners' film. That will make sense. Here's the link: th-cam.com/video/Z6-LksV08qU/w-d-xo.html
Well at least I can list multiples.
Unfortunately I did do this A LONG TIME AGO but I somehow forgot. D= Edit: What does GCF mean?
Greatest Common Factor.
You seriously need to go just one little step at a time and do oroblems with that strategy for one session till it makes sense, then move on from there.
Are you familiar with prime numbers? I have videos to help there in my playlist Factors, Prime Factors.
Yes.
Can you make a video in 23.472+27.1828 I need it to my module I need explanation 😭😭😭
I can't do your HW for you, but I can tell you how you need to do it. Line up the number using the decimal point as the line-up marker. Now you can do it all by yourself! 🤗
Are u n actual math teacher in real life?
Also I need some help with units.
I am an elementary teacher irl. And I have a passion for teaching maths because that was where I struggled, and I see that my struggles and the way I misunderstood or just didn’t get it… that does seem to be a pretty common set of misunderstanding with students around the world. So if I explain it in easy steps the way that makes sense to me (and would have helped me back then… ) that way will probably help a lot of other people who are struggling. I don’t have a maths degree. Mathematicians don’t understand why we can’t get it. It’s their failing, not ours.
@@LetsDoMath nice
I got the answer correct !!!
Fantastic! Way to go!!
Can we divide by 10 ?
You could, but 10 is not a prime number. Try to only divide by primes. 10 is from 2x5, so if a number ends in a zero, instead of dividing by 10, choose 2 or 5 since those are prime.
For myself, if it’s an even number, I just automatically go for 2 first and I keep going with 2 till I can’t use 2 any more. You’ll end up with the same combination of prime numbers whatever you do, so this works for me.
I hope that helps. 😃😎😉💕
love you
😙😍
Love you math
@@LetsDoMath love you math
Not bad but those arent large numbers, was hoping for trick to find LCM or numbers above 1E12
Thanks for the video cuz' I got wrong answers for math :(
Hi again, Jopel! I don't remember which videos you commented on the other day, I feel like it was fractions. LCM and GCF have their own playlist (same title). It's best to start LCM at the very beginning. Do you know how to do prime factorization? If not, you need to do that before you start LCM. I have a playlist called Factors, Prime Factors. Always start this each playlist at the beginning. Videos are not numbered, but the titles should guide you. I'm sorry to hear it went wrong for you, but I'm sure you can put it right. Easy steps to climb the mountain... much better than vertical leaps. :o)
If you have a specific example that went wrong, tell me the problem and what you put, and I should be better able to guide you to the right video. Hugs. Ms Steele
@@LetsDoMath I can now do prime factorizations. Thanks!
You can? FANTASTIC! That's going to be so useful to you.
Can you give me the prime factorization for 45?
9 x 5
MAAM
how to find LCM for the number 1339
LCM is for two or more numbers.
I doubt a teacher would assign this number!
Why do I struggle so much on LCM but not at all on what everyone else finds hard
Have you gone through my vids, from Intro to LCM, Find LCM using Prime Factorization (1: Intro for Beginners) and then Find LCM of 15, 32 and 66 using Prime Factorization (2: Take it further)
If you go through these films in order from easy to more tricky, it will make sense and you will find it easy.
Have you done prime factorization before?
I think you are struggling because there's a bit of understanding missing. I don't know what is causing you a problem but going through these films and taking the time to go right through, so you see the whole thing... this will help you, I am certain.
I don't even understand the basics of it.
Thankuuu tomorrow is my papper
Best of luck, Gurtaj. 🤗🤗😃👍
@@LetsDoMath where aru you from 😀😀😀😀
I am from Lancashire, in the UK. I now live in Canada. What about you? Where are you from?
@@LetsDoMath canada
Cool. We’re both in 🇨🇦
I pass^-^
You passed? EXCELLENT! Thanks for sharing. Have a lovely day.
And what if nos are like 391,667 , 5671
At school, teachers are looking to see if you can apply clues, rules of divisibility to extract the primes.
391 is the product of 17x23. 667 is from 23x29 and 5671 is from 53x107.
I seriously doubt any teacher would find a point in giving such numbers. And if they do have such a sadistic streak, and you can't spot a likely way in... do what I did, google 'prime factorization calculator' and find the answer.
Honestly, the point is being able to reveal prime factors. They'll only give you one prime that can't be worked out with a reasonable knowledge of rules of divisibility. So you might be left with 17 or 23 or 53 at the end, but you won't get a couple of tricky ones like that.
Lcm of 198 252 and 308
Try and use the given method to work it out. 👍😃
It wasn’t explained very well so ya I don’t understand. But ur previous video for LCM was great
Oh dear. Sorry it was a miss for you. What I’m doing here is to divide by appropriate (obvious) prime numbers, and pulling them out that way.
Do you know how to do short division?
I don’t understand 😭😭😭 where did the nine come from 😂 I’m hopeless
Did you watch the prime factorization lessons 1 and 2 before this? Always take them in order to have things make sense.
Here's the link to the playlist just in case: th-cam.com/play/PLZXaB-dpg4g2UrNuJhHk7kMiJF26Z92si.html
What if the numbers are prime numbers so 5, 13, 31.
In that case it’s easy. What does the method show you?
First get the prime factorization. Then use the table, then what?
Over to you. 🤗😉💕
@@LetsDoMath I'm so confused 😂 I suck at maths can u pls elaborate
@zyad safwat Are you trying to say 'dumb'?
Why si there only 4 3's?
So, this is all explained in the first video: Finding the LCM using Prime Factorization. This video, on which you commented, is kind of the one you watch AFTER you've got a bunch of practice with this method. Please do yourself a favour and watch an easier video to build your confidence.
@@LetsDoMath thanks
@@LetsDoMath what's a vertical pair?
@@dot9513 It is when you get a vertical column with the same prime factor sitting in that column. If you look at what I'm doing, there's only one factor from each column being used to find the LCM.
Really, you've just got to start with the beginning video for finding LCM by prime factorization.
I don't understand the division of 231 and 3465 😟
Sounds like you have never seen short division before. To help you understand, if you click on the playlists tab and then on the vid called Short Division with a remainder... that’s the best vid I have uploaded to get shirt division for the first time for you.
You must have done some division as you’re looking at this vid on LCM. This is just a process issue. Short division is a slightly different standard algorithm than long division because you don’t end up writing down a subtraction to find the difference. You don’t have to - you’ll see there’s another way you can think about it. Once you’ve seen a few examples and done a few practice problems using this method, I think you’ll get its value. 😃😎😉
I have a doubt the prime factors of 81 are 3,3,3,3 and 231 are 3,7,11 and 3465 are 5,3,3,7,11 then instead of multiplying 3*3*3*3*3*7*11*5*3*3*7*11,why are you multiplying 3*3*3*3*5*7*11?? I am getting confused by this??
HI Channu. The primes are exactly as I show them being found.
I think it will help you to look at my earlier video on this:
th-cam.com/video/fRoWMakrIhw/w-d-xo.html
I don't multiply every single factor, just one from each column because one column factor set belongs to each number. If I multiplied every factor I found, it would be massively wrong.
This is a big example if it is your first one. Please look at the other film for a slower pace, and easier numbers.
Thanks, and I hope this helps.
LadyDMcollector thank you, I saw your earlier video also, I understood, it helped me, thanks
That's great, Channu! Thanks for letting me know.
OMG
I still don’t get the very last step 🤦🏻♀️
Hi Anya,
Please go to the LCM & GCF Playlist and go through the first vid on finding LCM using prime factorization. It is fully explained in that one. You can totally do this. If everything else is ok, you’re nearly there. 🤗😃💕😉
Im embaressed to say i had to watch this multiple times to understand
Well if you haven’t been doing a bunch of prime factorizations recently, or if you’re not that familiar with short division, I get it. It’s all about practice. The order of ‘attack’ is set out to make it easier for you - there’s no way of missing that if you use my website letsdomath.ca 😃🤗😉💕
Total damn
What about big numbers 10 thousands and hunderthousands
Follow the same approach. IF your teacher gives you numbers that big, there will only be one stinky prime and all the rest should be quite manageable. By this I mean that you might be left with 41 after you’ve done all your divisions. It’s up to you to recognize that last quotient as a prime. You got this!
why only 4 3s
You didn’t see the earlier vids on LCM through prime factorization, did you.
In this method, we set up each prime factor in a table. Notice that I am
matching up like factors, then at the end you take one factor from every column, multiply them all together and that’s how you get your LCM.
If this has you lost, please click on playlists tab and go to the first vid on finding the LCM by prime factorization. It goes nice and slowly so you can really get the hang of it.
In this vid so have made the assumption that you have seen the method before, and know how it works.
Edit: phone generated capitalization that I didn’t notice till I hit ‘POST’. Sigh.
I had homework on it. If i didnt see this video i would probably get a C or a D
OK then. I hope you are feeling good about this now. It's pretty much a matter of practise so you can build the confidence you need to have a go. I'm so glad to hear how confident you are becoming.
LadyDMcollector.. Thank u for making the video for me and for everyone! And do u only do u math?
Everyone is welcome - if it helps you, it was worth my time to make it.
Looking at my list of videos, I can see that it might look like math is my passion in life. And it's true, math films are most of what I put up on TH-cam at the moment.
I have a LOT of interests, but I don't make films about all of them. There isn't enough time for me to do that.
I absolutely LOVE to write, for my pleasure and fun, for my kids, and sometimes I share this writing with kids in schools too, when I'm supplying in their class. I really get a kick out of simple rhyming couplets, and I have put a couple up on my channel.
th-cam.com/video/fwOwhm2QoOA/w-d-xo.html - about how to keep your marks up in written work at school,
And this one: th-cam.com/video/sOdgNN0jcfo/w-d-xo.html - about how to use the apostrophe
My latest thing is I'm learning Spanish. Since I already speak French, this is going quite well. As I love to write, I'm practicing my Spanish by actually writing stuff, and I'm having a great time. I'm in the middle of a novella! I may actually get it up on Amazon using the Lulu self-publishing platform.
I also like to design clothes. I made a killer evening dress for my teenage daughter.
Hold on a sec. You have a teenage daughter?!?
Well I'm not a teenager yet.
Pls teach in easy way I didn't understand and I'm from class 3
This is meant for people quite a bit older than you, Lukas. In class 3, I want you to focus on your adding and subtracting first. Then once that’s strong, learn your times tables.
The stuff in this video is maybe 4 years in the future for you. 😉🤗
LCM of 17445
I want without calculator
I solve it here without a calculator.
If you're in school, they should not give you numbers that have 2 big primes as part of the prime factorization.
I expect you will get numbers made up from combinations of 2,3,5,7, 11 and maybe one higher one, 13 and up. We would expect you to realise that last number, maybe 41 is a prime. You CAN do this with short division.
I don't get it. I thought to find the LCM, you only use the prime factors that the numbers have in common. The prime factor of 5 has nothing in common with the other 2 numbers.
Why not start at the first vid on LCM by prime factorization and follow the method right through. This is the last one and expects a viewer to be confident with the method.
Earlier vids 1 and 2 will help you a lot. Here's a link to the playlist: th-cam.com/play/PLZXaB-dpg4g2UrNuJhHk7kMiJF26Z92si.html
@@LetsDoMath Thank you.
@@69johndz Is it all ok now? Are you happy you know what you're doing now? Hope so.
I don’t get this
Here I'm using different methods of finding the prime factors of each number. 81 is easy because we know how to multiply up to it, so I use a factor tree. We don't know how to multiply up to 231, so I divide to find its prime factors. Same deal with 3465.
Once I've got all the prime factors, I put them into that table that I like to use, and take one factor from each column, then multiply out to get the LCM.
Have you seen the earlier films where I use this method? It's always best to go back to an earlier point you do understand and see if you can follow that, then make the step to the more tricky problem.
I hope this helps you. :o)
31185
You got it!
👍👍👍
Thanks for the thumbs up!
3465
Nope. At the beginning of the vid I say it's not that. Using prime factorization we can find it though.
I want LCM of 138
Maybe start off with the film LCM for Beginners to really understand what it’s all about
your way of dividing is different from what I have seen. if 231 divided by 3 is 77 then how 11 came out to be a prime factor of 231?
Because 77 = 11x7, both primes. When we use the division method, we only divide by primes.
Hope that answers your question.
Alternatively, you can use a hybrid approach. Once you get to a value you recognize in your multiplication tables (77), you can switch to factor trees - 11 x 7. I have a couple of films on finding all the factors of ANY number, using prime factorization, and I do that hybrid thing in both those films.
I hope that helps you.
Y
I don't get this
If you look at each film in number order it should make sense
I did not get the last step
Hi Paul. I got 2 notes from you; this one and another that says 'I got it'. Are you ok with this?
I was confuses later
Did the table confuse you?
You take ONE number from every column.
This is the same method I showed in earlier films. It's easier in those. Please take a look at this video for an easy explanation. th-cam.com/video/fRoWMakrIhw/w-d-xo.html&index=5&list=PLZXaB-dpg4g2UrNuJhHk7kMiJF26Z92si
thanks
Without you i can't get A+
Well thank you very much Ahmed! I'm just using words and images that work for visual people. You are getting the marks with your work because you have done the learning! Way to go!!
I need easy Lcm :-)
Please go to the earlier LCM films in my channel.
Here's the one for first time LCM using prime factorization.
th-cam.com/users/edit?o=U&video_id=fRoWMakrIhw&feature=vm
There is a complete beginners LCM film too.
Hope that helps.
okay
Cheater
You never replied my comment
So I am no longer your suscriber
Ela calculater use cheste exam rayanivaru bayatiki tostaru
A calculator is no use here, except for help with the divisions. For these questions, you really need to know what to do, and what prime numbers are.
Thanks for your note. 😃🤗😎👍
It's ok
Who else got a studypug ad
me
I dont get it
Have you done prime factorization with a factor tree before?
And have you done short division before?
@@LetsDoMath I have but I have trouble understanding calculations, especially if they are online and my math teacher barely teaches me anything
Ok, so where exactly (timecode stamp please) do you get stuck? I'll walk you through it. I'm not sure if it will help to see it written in paragraph form, but maybe I can explain it slightly differently or elucidate a bit so you can follow the process and thinking better.
@@LetsDoMath 0:56 and 1:14, it's just hard for me to understand 😖
At around 0:56, that's where I'm doing the prime factorization for 231.
I'm assuming an understanding of rules of divisibility, but you may have missed that info. Not to worry, I have a vid on rules of divisibility for 3... here: th-cam.com/video/xdunx3IbkeI/w-d-xo.html
What the heck is a rule of divisibility anyway? It's a way of knowing (before you even start!) whether a particular divisor will work for a given number. I bet you already intuitively know the rule for 2. Any even number is divisible by 2! And the rule for 5... if your number ends in 5 or 0, it's divisibly by 5. The rule for 3 isn't quite as easy, but once you see the vid, it will make total sense. When you watch it, you're going to see a pattern pointed out, which maybe you never spotted before. AND the rule will be explained. Once you get the rule, the tricky numbers you're not sure about, well they are going to be made much easier to approach.
She expalins too fast🤯
Sorry. You can slow down the speed of the film in the settings. Hit the cog at the bottom right hand side and select a slower speed. Also, it will help you to pause the film often and take notes of what’s going on. I’m certain you can get this. 😉😃🤗
who else is here one day befor the exam
Best of luck for that exam. I hope you ace it!
Sorry, but in our school calculator is not allowed. 😡😡
Then it will just take longer because you will need to do your multiplication on paper, that’s all.
We can take care of the first line on a single stroke: 3x3x3x3 = 81
Sad o jump right in there and say 81x5
Then that result x7
And finally, that result x 11
🤗💕
Using calculator funny
😉 😆 😂
The Indians approve this
OK, cool! In India, do you guys usually do short division?
When I look at the metrics for this video, who is viewing at what time and when the dislikes are being logged... there is a clear indication that people in the USA don't like it. I feel like in the USA people are not generally being exposed to multiple methods of division. It seems like short division makes people uncomfortable. Is that right, guys in the USA?
They normally do Vedic math techniques.