Multiplication trick you wish you had been taught!

[@andrewd4890]

My maths teacher’s favourite was this one. Noah is sending the animals out from the Ark after arriving on dry ground. “Go forth and multiply” he tells them. But the snakes say “we can’t, we’re adders”. Ok, that was in year 7. Then in year 8, he added the response from Noah, “well, use logs”. That was in the 60s.

[@sallyrose8075]

They say "You can't teach an old dog new tricks." In this case, it's true. At 62, I can't get my head to memorise this. Can still do long multiplication with ease. And at speed.

[@GeekProdigyGuy]

it's ok... this "trick" just makes use of a little extra mental math and less writing. it can be faster that way, but you are still doing the same number of digit multiplications and additions.

[@omurice8534]

what are you doing here old man

[@daniel-xt3tp]

@@omurice8534clapping yo ma

[@einrazer]

As a math teacher im going to tell you that this will confuse the heck out of my students...take about two weeks to teach and then take away from any learning that can happen further. Shortcuts are great, i teach them when i can...but if all you teach is shortcuts then how will someone apply the knowledge to higher learning. I do understand that not a high portion of students will go on to high levels of mathematics, but there are those that might even though they don't think they will yet. The more you ignore fundamentals and focus on fast pathway shortcuts....the harder it is for students to grasp more complicated things. Having said that, this is a fun trick.

[@einrazer]

@@youtubeguy8796 fair idea. And that could happen but at that point i would probably defer them to a video (this one perhaps) so that im not cutting into class time with a shortcut rather than something new. I appreciate the fact that you were asking in a respectful way btw. And by no means do i have a problem with someone disagreeing with me. This is my opinion and nothing more and i try to use discourse in the class to teach something.

[@SteveMasslock]

I agree, this is faster but not necessarily easier . Stick with the way you're taught till it's learned, then on your own learn the short cuts. Faster is not equal to better.

[@apieceofschmitt]

It's not a "shortcut" and you are still applying mathematical knowledge. PLACE VALUE. Tens times Hundreds, equals Thousands. How do you teach 8 x 12? ((8x10) + (8x2)) = 80+16=96 --- OR --- 8x2 --> 16 (carry the one, 1_) ---> 8x10= 80 ---> 80 + 1_ = 90 ---> 90 + _6 = 96 The former applies basic knowledge of addition and multiplication (while still applying place value, but ignoring explaining such). The latter involves knowledge of place value. It requires knowledge of place value and applying such to get to the answer. It's not a substitute for knowledge, it actually requires more knowledge to make the calculation potentially easier and quicker given the numbers involved.

[@einrazer]

@@apieceofschmitt im not entirely in disagreement with you. However, the way it was expressed was as a faster process. Individuals comment why didnt my teacher go over this. Now, its a great thing to teach, in no way would I argue against that. But the time to learn ratio would be very high and take away from other aspects. I do believe in working on fundamentals with individuals whenever they are needed, but the whole year cant be just fundamentals at a high school level. This is a weighted subject (teaching in general i mean) with a lot of factors that go into what we need to have students do. I get students coming in with numeracy deficiencies that are extreme to put lightly (i teach at high school level). That is not to say they are dumb. They are actually very intelligent. This was just never a priority in their community. So by the time i get through making this make sense to the majority of the students, we will have lost time to other things.

[@danh9503]

Just because you're maths teacher doesn't mean you're always right lol... Different people different methods. Simple as that

[@JoeMama-tx3kb]

Honestly I question why they don’t implement this into the school system and teach us in this instead? Your strategies work way better and faster

[@anthonywhelan5419]

Educationalists know about this method but it doesn't address the bedrock of Mathematics - Place Value. Otherwise let's just let the kids use calculators.

[@theicedevil]

Because, the powers that be decided that Math is suppose to be a multiple choice question instead.

[@Liz-ic6jb]

Learning is not just about what works fast. It's understanding the concepts too. The long process gives you understanding which is necessary for those that will teach, and develop short methods like the teacher of this video.

[@prajeshtalwar3417]

@@Liz-ic6jb the thing is they will never teach you these shorter methods but expect you to be able to solve large problems quickly

[@livinginthenow]

Normally, I really love your tips and tricks. But this one involves remembering too much hinkery pinkery for me. I find it easier and faster to do it the old way. But I'm sure that for those with more short term memory capacity this might be a fun method. That being said, keep up the good work!

[@tecmath]

Hinkery Pinkery! - I've never heard that! That is awesome.

[@jenniferclarke3622]

I agree.

[@KoLecnac]

Practice a bit more. This is definitely faster. | X >|< >X< >|< X |

[@basrover6544]

I do this from the right to the left, works even faster without the need for the addition at the end.😇

[@KhubaibKamran]

Sir, every viewer owes you respect. I recently started watching your videos, it helped me a lot. And the fact that you've been doing this for 10 years now is overwhelming. Really appreciate your lessons and your method of teaching :)

[@nasimahmed1372]

I have a maths test coming soon and this guy is just making everything easier for me. Thank you

[@axolotl09]

Me too

[@nasimahmed1372]

@@axolotl09 yeah I’m pretty sure it helped everyone hopefully!😀

[@aletaschulz1108]

This is new to me and I love it. I'll keep practicing until I get it programed into my memory. Thank you for teaching me a new short cut in multiplication.🤗💚

[@tecmath]

Thanks!

[@KarIsTheStar]

I understand that. In my free time I am writing in math problems and trying to solve them. It is more math problems than I ever did in school, and I am doing them for fun.

[@StormWarningMom]

Totally cool. So much less messy than the traditional way.

[@philspencelayh5464]

Really?

[@yime6631]

This guy is fantastic with his math "tricks." I'm calling it efficient and effective TEACHING. Very well done!

[@leepalmer1210]

This is way harder than starting in the ones column and then the tens colum, then the hundreds then the thousands. Always remembering anytime you make a number bigger than ten you carry that one to the next column

[@jenniferjones608]

Yes, is there a reason this wouldn’t work right to left?

[@tonybarfridge4369]

You should compile these in a book or ebook. Also u could use puzzles like recreational math. That would be awesome for people like me who enjoy that kind of pastime.

[@IS-py3dk]

1 of your examples always clears my doubt and helps me with it This time it was the 2nd one of *432 × 3124*

[@svengain7020]

I just watched the previous video and you shared this new one showing ×4 . You mentioned it and I was wondering how you you continue the pattern across with larger numbers. The diagram on the side really help understand. Thanks for those visuals. I just found this chanel and I was stooged by my teachers. You make it so much easier to comprehend math and create a curiosity for more knowledge. Again thank you and keep up the world changing miracles you do. 👍

[@sayhi2kojo1]

Well Done sir please can you teach statistics to win lotto?

[@arthein7616]

This channel is gold

[@jackhuber1057]

This helps me so much. Now my teacher is confused how I can do problems so quickly haha. Your tricks are goated!

[@zelda1420]

All in all, this method has just the same amount of math, but _can_ be done faster, just only because there's more at once, and it's much more in your head, and less on paper.

[@UmarAlFarooq]

Brillian!! I wonder if your tutorials would be as much fun if we the masses weren't taught the bad way.

[@barbeckes6708]

Like the way you do this but my old brain didn't work that fast. I'll have to work on it.

[@bobman929]

Is it actually easier. You are just moving when you do the addition or multiplication.

[@Vendavalez]

Haven’t done any real testing, but I would imagine that this should be faster because you can do more things in your head so you end up having to write a lot less which should save you some time assuming that it takes you the same amount of time to do the calculations.

[@Sesame1512]

I am a tiny bit confused, but I think it is because my brain is happy with the normal method and refuses to learn new things....

[@axolotl09]

@@Sesame1512 you just have to practice more

[@Sesame1512]

@@axolotl09 Thanks! I have somehow mastered the technique I once considered confusing.

[@beautifulday1665]

I think...uhhh. *i think I am in love with the like button.* !!! _blushes then run quickly_

[@tecmath]

Did that like button break your heart?

[@beautifulday1665]

@@tecmath no, it actually made my day 😁😁

[@imhalida]

I gave the link to your channel to my sister who's been struggling to teach my nephew math and she was very excited😄

[@wyattstevens8574]

I noticed that you started 3124*2152 from the left, but I personally would start from the right and work with any carries along the way.

[@ShuchitaClasses]

Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.🌻🌻🌻🌻🌻🌻🌻🌻🌻🌻🌻🌻🌻🌻

[@NarutoSSj6]

I imagen the addition hell this will lead to if you try numbers consisting of bigger digits

[@tecmath]

No it's fine... but obviously increases the chance of a mistake.

[@nundiph]

@@tecmath can you please give us an example. I trying to teach my daughter this way and it’s going well but we come to a stand still when we add and the number ends up being 3 digits.

[@foxtrot8325]

@@nundiph It goes the way it normally goes, put down the first digit(ones/unit digit) and carry the rest. For example if you end up with say 273, put the 3 as you normally would and carry 27. Yes, it is weird because you don't need to carry two digits when doing it the standard way.

[@nundiph]

@@foxtrot8325 I thought that’s what I did and when I put the problem in the calculator my answer was wrong but I’m going to do it and now. Thank you so much.

[@nundiph]

@@foxtrot8325 Thank you so much. I applied it and got the correct answer.

[@HerHollyness]

This is a great shortcut for people who already understand long multiplication BUT, as a former teacher, I know this would not work as a replacement for it. If people don’t understand the fundamentals, they can’t apply their learning to harder concepts. They’d be great at doing speedy calculations and terrible when it comes to actually using multiplication for anything harder.

[@dr_sian]

I've seen a previous video you've done for this method (for 3x3 digit numbers I think) but where you work it out R to L rather than L to R as here. Just wondering why L to R? Surely the R to L method allows you to carry as you go along so more effective? I do so LOVE the method tho'. ❤️👍

[@coreymcdonald7745]

Right to left, or left to right, it doesn’t matter with this method. You get the same result

[@coreymcdonald7745]

I think the reason he did left to right here is because of the carryovers. Much easier to add the carryovers in if you’re going left to right, instead of right to left,

[@customthings3368]

Working these out how you show us is actually addictive and you want to try more and I'm kak at math!

[@hsemu316]

I knew this method, but working it out from left to right makes it more effective...Great video...

[@tonybarfridge4369]

Yes the Vedic sutra. Love that thanks. At least u didn't give us 5 seconds this time :D I did try the first one and got it right

[@tecmath]

Good work. And yes. Vedic maths.

[@tonybarfridge4369]

@@tecmath Thanks. I understand there are other Vedic methods which may be of interest. I found the regular way a tad boring but this is interesting and no it was certainly not taught at our school.

[@enochatombo6460]

@@tonybarfridge4369 in five seconds

[@douglasnewman4163]

This is such a great method! Thanks for show it to everyone. Love your channel.

[@DRDJkoolade]

I love that PIMPNITE helps us with our Math on this channel and our Pokémon on his other channel. Such a cool dude 😄

[@hypersqued9815]

I used this method on my test, I got only 1 out of 3 because of the wrong method this world is cruel

[@nuraisha4546]

I just learned on your video how to multiply 3 digits number the fastest way, my head was spinning but after rewatching multiple times, I finally got it. Now you came up with 4 digits? Slow down dude! Because now I’m feeling dizzy 😵‍💫 😆

[@kathydoyle9939]

Excellent!

[@foden5471]

What to do if sum is getting 3 digit no.?

[@nundiph]

Right! I’ve been stuck on that for the last two days. Can’t find an example anywhere.

[@foden5471]

Try left to right that's reliable

[@foxtrot8325]

Put down the ones/unit digit as you normally would and carry the rest. For example if you get 138, put down 8 normally and carry 13(Yup it is weird.)

[@foden5471]

Thank you very much🙏

[@eclipse369.]

Ok before you went right to left now going left to right. Right to left only requires one final number, the answer, to be written so it's faster.

[@viktorijauzunova2263]

Thank you for the lesson

[@IS-py3dk]

Every 2 months tecmath Sir brings such a multiplication trick in which it has 1 digit more Today there were 4 digits, so in the other 2 months i guess you will bring a trick which includes 5 digit numbers 😃

[@yogipoo]

you've gotta make a podcast, that voice tho

[@tecmath]

On Maths... or just random rants?

[@yogipoo]

@@tecmath both 😂

[@khian9441]

Hey have you done subtracting mixed numbers with borrowing? I forgot how to do it

[@officialmarshe]

This is very helpful for me, as I have to take a test for a job position which requires me to figure out large problems quickly. I just wonder what happens with five digit numbers, and so on…

[@Tsax1949]

Awesome! Love it!

[@lan5142]

You’re a genius😁

[@andypartridge800]

This, or the lattice method, are much quicker than the old traditional 'right to left' way

[@zxuiji]

This one was actually new to me, went and shared the vid on FB in addition to giving it a like

[@tecmath]

Thank you.

[@c-light7624]

I had to look up the definition of jibbed. Even with the context I needed to make sure.

[@zimbabweangamer7594]

I have a question. How do we do percentage with decial numbers and decimal answers? Ex: 20% of 42.33=?

[@shawnlanders2034]

I was never good at math. I.lesrned so much watching these videos. Keep up the awesome job!!

[@iliajsr7928]

It was really useful and it will help me a lot in solving problems. Thank you

[@JDMillest23]

Teachers always ask us to show our work back when I was in school. This wouldn't work in my math class. Not sure about kids now in school.

[@fraso7331]

A great trick. But what about 5 digit and higher digit numbers?

[@frankovalencia7720]

Oh my God THANKS!

[@tecmath]

Hope you liked it.

[@olatunbosunolubunmi5279]

Thanks man

[@lakshayjain4]

Can we only use this on 4 digit numbers?

[@marvinboggs]

I like the old way better.

[@themrunknown850]

i wish i knew this sooner...

[@olspanner]

Brilliant ! Is there a valid reason that this method is not taught in schools?

[@dr_sian]

I'm guessing just because it requires a little too much mental maths juggling in your head. Only the very best maths students would manage this without error. Otherwise I would TOTALLY advocate teaching it.

[@user-ml4rh4cw5h]

hello, first of all thkx for ur video's they help alot. Could u make a math trick video with 3 diggit behind the number for example. 27 x 23,642 =

[@anthonywhelan5419]

I love Math party tricks, but you aren't teaching Place Value which is why the longer approach was implemented in educational systems throughout the world.

[@tecmath]

Place value can be taught in this, but that is better doing right to left.

[@PranamPGowda]

Hello sir What if we get 2-digit number as carry I didn't get this Please help sir

[@queengoddess1716]

A little confusing but I will keep practicing.

[@apsingh1792]

Thank you so much sir Best Math teacher ever 👌 I subscribed lightshade hit that notification button

[@7MPhonemicEnglish]

Doing math by hand is obsolete until the next z Carrington event.

[@TheSweetMoons]

I’m early! Thank you so much for making this channel! After watching an anime- (The Promised Neverland) I’ve been wanting to get a very high iq this helps me so much!

[@praxseb4317]

I mean.... Getting a very high IQ is probably impossible if your brain is fully developed and you don't have the genes for it. This just made you better at mulitiplication, your IQ didn't increase at all.... Yoi just learnt a method to solving a problem.

[@praxseb4317]

@@septicon1248 Agreed! Every study shows that IQ is mostly genetics; somebody with down syndrome will never have a high IQ no matter how many puzzles you give that person.

[@TheSweetMoons]

@@praxseb4317 I know, I’m smart enough to know IQ doesn’t raise by being intelligent 😂 It’s mostly about problem-solving. For heck I don’t know my IQ and it could be possible I have the genes Bc my mom has an IQ of 140 and I taught myself division at the age of kindergarten/early first grade. I know I sound like someone who wants to be really smart, and yes I really wanna be! And I’ll work my butt off to get it!

[@TheSweetMoons]

@@septicon1248 I know IQ doesn’t raise by being intelligent 😂 It’s mostly about problem-solving. For heck I don’t know my IQ and it could be possible I have the genes Bc my mom has an IQ of 140 and I taught myself division at the age of kindergarten/early first grade. I know I sound like someone who wants to be really smart, and yes I really wanna be! And I’ll work my butt off to get it! Sorry I copied and pasted it to say it to both sorry lol

[@TheSweetMoons]

@Cameron C ?

[@joeanderson2024]

What's the difference between Halloween and Christmas? Nothing, Dec 25=Oct 31 What do you get when you pour root beer into a square glass? Beer There are 10 types of people in this world. Those that enjoy math and those that don't realize this joke is in base 2

[@tecmath]

Magnificent! I'd never heard any of these!

[@joeanderson2024]

@@tecmath another good one What’s a polynomial? A dead parrot (poly no meal) What’s a logarithm? Lumberjack music What’s an algorithm? Vice President music (Al Gore)

[@johnstewart7274]

Not sure about this method 🤔 Is it harder to find a mistake if you go wrong?

[@eclipse369.]

Yes This is why must learn 1-9x multiplication and learn to add. If you get it wrong you will never know without calculator, doing it the long way or long decision.

[@isaacgaming8213]

Hello mr math wizard 🧙

[@tecmath]

Hi

[@PatVMurphy]

@Techmath, Is one of your jokes going to be about the constipated mathematician?

[@tecmath]

Maybe. I've still got to do the shanty!

[@womensintuition]

Well, it was faster and more organized the old fashioned way.

[@Bucketbrain82]

At school i was too scared to say what do you mean? So i nodded and failed and gave up on myself in maths. If you was my teacher i would learn from you, then by showing someone else. I will refer people to you. Thanks.

[@saiprasad8078]

All my teachers did was give a calculator.

[@RajKumar-vz4cq]

Sir game fb gb gl ds ki singal jodne milega

[@kaiji2542]

Similar to the criss-cross method.

[@Kmon4y]

oh boy

[@zelda1420]

Okay so, basically the way you did this math is that you do the same amount of math all in all, but this method is done more in your head than on paper, and done more all at once, so technically it kind of can be faster, but it's the same amount of math, just a lot crammed together. I see the appeal for those who can and _want_ to do it more quickly by not writing it down and instead doing it in your head, but for those starting multiplication, it's much easier to do it the more traditional method, because it's done more slowly, and then you don't have to remember as much all at once as well. That's the difference.

[@zelda1420]

All in all, this method is the same amount of math, but can be done faster, just because there's more at once and it's much more in your head, less on paper.

[@rubyred6687]

Cool method. Sadly, when dealing with higher numbers (7,8,9) it becomes quite challenging to add them together in your head

[@axolotl09]

then you should get a piece of paper and a pen

[@TheManjusu]

This is Vedic math

[@WorldwideScents]

Wish that was my bank acct

[@ChanthologyInc]

I was taught this actually

[@tecmath]

That's awesome. Not many are.

[@Dipher_]

very cool video! happy i learned this

[@ezra1969able]

It doesn't work with larger four digits numbers.

[@KarIsTheStar]

I am not here for the math, I am here for the jokes! GIVE US THE MATH JOKES!!!!!

[@ktushy4727]

Wait, I remember something like this were you multiply it by sliding the top, is it not the same thing? Though, thanks for the content! Edit: I just realized, this is just the same thing school teaches you but rephrased! Edit 2: you also made this same video a year ago already, but the other way around, I think you may have missed that so that’s why you unlisted it or something.

[@tecmath]

It is an expanded version of that. The method you are thinking of is possibly a method I made a video on about 10 years ago.

[@tecmath]

And it is just rephrased. Love that!

[@ktushy4727]

@@tecmath oh! I did not know that, well I don’t really know anything, I’m just a student who watches KZbin on their free time

[@ealize7460]

Thank you. Makes the non-calculator portion of tests way easier! No more lengthy equations with a billion nonsensical zeros added beneath them.

[@bensmith3621]

it feels like im doing latice but in different setup

[@jimmyj2876]

I heard that 4 out of 3 people can't do fractions

[@glenna9811]

Nah, I’ll just ask Alexa or Siri

[@不只是谁所无名找小二]

Nice trick, but not very reliable when the numbers get bigger so sticking with the technique taught in school would be more viable

[@mathbbn2676]

👍👍👍👍👍

[@hanab837]

Ok, this one does not seem easier to me....

[@danielwest8062]

To many steps. I'm old school

[@abjadhauwaz989]

This method is even harder than the school method.

[@nila7120]

Yours is confusing I know long one but thanks will try practice makes perfect

[@mythologicalmyth]

Still have to add. Ehhhh

[@philspencelayh5464]

Thats even more long winded than the traditional method with much more scope for mistakes

[@brandonbosire211]

AAAAAAAAAAHHHH HAHAHA, that trick nahhhh

[@CLXTCHGOD]

This is more helpful than Jesus' teachings! (no offense to christians)