How do japanese multiply??

[DrSeussFreak]

this is pretty slick

[TrocaderoKillen]

This is extremely helpful and easy to learn! I've always hated mathematics, but this helped me alot!

[DJHempy]

Where was this when I was in high school!

[SanaZ1126]

Asians.

[danielcriativos]

1 agora entendi

[danielcriativos]

Só não entendi o final

[KenMacMillan]

This originated in India.

[sugar833]

this is just latis multiplication, we learned this in fourth grade in iowa.

[SanaZ1126]

@sugar833 its a different kind of lattice

[CinnyMun7]

How do you know where to draw the arcs? o.0

[fabr13]

Ladies and gentlemen my brain has left the building

[Jasas0ad]

I click to play, but the video just stop :/

[flame0154]

It's just long multiplication with pictures

[MilkySorbet]

This is really good for people who have difficulties with numbers in general.

Or those who keep forgetting how to do it normally.

I like.

[4TheCacti]

Just like bunnies!

[srikiraju]

Right, if the Japanese did this, they'd be as bankrupt as America.

[hrvoe123]

i calcualted the first 1 in my head... thumbs up if u can do it 2 !!!!

[LeighCaldwell]

Cute, but it's exactly the same as the normal long multiplication method we all use - except that instead of remembering that 3x2 = 6, you draw it out and count the corners.

The structure of the method gives you an easy way to know which digits add up and in which positions of the answer, but when you apply normal long multiplication step-by-step this is not a problem.

Would be impractical to multiply numbers with larger digits; for these the conventional method is likely to be quicker.

[cuentafrijoles]

Intriguing alternative to the traditional computational method of long multiplication. Thanks for sharing this.

[huongcomay1995]

VERY DIFFICULT FOR APPLICATION

[mothrajp]

what's all those Japan bashing in here? chillaxer1993 ? That's how Tsunami happened huh? What a shit head. By the way, this method is called "Mayan Multiplication" and nothign to do with Japanese or Asian!

[chillaxer1993]

and then the tsunami happened because someone tried dividing by zero

[DoctorFedora]

I work in a school in Japan, and when asked, nobody here had ever seen anything like this…

[chaz2290]

Can someone cleverer than me tell me if this actually works? Just weird because if this works...why weren't I taught it in school? Looks amazing.

[Roren03]

wat is this i dont even....

[KeiitiProductionsZ]

O.O

[BitchBeTrollinHard]

i cant draw straighter lines with a ruler

[Panchee123]

Im confucioused

[MrJaxyagi]

I'm Japanese.....somebody questioned how to work on 999x999. I will do it in my mind

999 x 1,000 - 999 = 998,001. I won't use such a complicated method. You just shuffle numbers to make easiest, fastest way to process.

[TROOPERsage]

@MrJaxyagi :D cool

[dukerajn]

@MrJaxyagi that's how i multiply too. the only problem with these methods out there is that with its limitations, people need to memorize a whole lot of rules. and most of the time, it's those fast learners who have the mental capacity to memorize. Slow learners are at a handicap. visual / spatial methods are promising, although take up much more time.

[ThirdClassCitizen]

@MrJaxyagi I think I speak for every American when I say that I'm glad we invaded and still are occupying you guys.

[Treevor]

@ThirdClassCitizen Fuck you

[mothrajp]

@ThirdClassCitizen  what an arse hole.

[ThirdClassCitizen]

@mothrajp I have to agree with you; Trever is rude. Indeed you can say he represents the anus of the human species. Are perhaps you're talking about MrJaxyagi? The word I would use is "slave" as the Japanese are basically our female canine.

[ShuckleShellAnemia]

@MrJaxyagi That's what I do too!

[gooserex]

@MrJaxyagi so i'm not crazy after all, this is usually how I do math.

[dilaudid]

@MrJaxyagi - if you always do the simplest method why don't you just use a calculator? That is faster, and works for all numbers, not just ones made from 1s, 2s and 3s.

[TwoTekah]

@dilaudid becaue a calculator is like a crutch, you use it if you dont know the answer, and using a calculator doesnt do much for your intelligence at all.

[musketeer925]

@dilaudid And if you tried it, this works with numbers not just made of ones, twos, and threes. I just tried this out and it worked fine with 361 * 156.

[MrJaxyagi]

@dilaudid Well, most of time calculator is not available for me, and, I'm trying to use brain for trying not to senile (I'm 78). The method shown on the video I have never seen, or known in Japan. Maybe old Wasan(Japanese math) Before the calculator, Japanese used to use Soroban (abacus) extensively. To be good at it, we have learned to mult/div in mind (momerizing 2x2 to 9x9 at elementary school). I am inept using fingers on calcltr or soroban. So, using brain is easier.

[Wongie2009]

@MrJaxyagi That's so true. At least anybody would know how to multiply any number by a thousand. Add the zeros, of course.

[ashliebelle]

3g483

[longyingtan]

To placeboplatypus,

Those Chinese characters are the names of the book and time we can find the earliest referrence to this kind of calculation method. Just because you lack the knowledge of another language, doesn't the people who know that language is cursing you in that language.

[openmikescene]

A pretty way to take still MORE time at the task!

[bladerj]

try doing that on a public exam or even school, they dont give you enough space for traditional math much less these drawings.

[thisisagreatusername]

Geez. This isn't invented or used by the Japanese. It was created by Alex Bellos, a Brit, based on Vedic maths, a Sanskrit math system.

[JeanAlphonseJaune]

@thisisagreatusername egyptians or greeks surely discovered that sooner ;)

[yimmy89]

This is very cool. Basically a graphical version of lattice multiplication. For those who asked, I would suggest using the standard numerical version of lattice multiplication for the '999x999' type problems. But for many problems, it seems like this graphical version would actually be much easier. Awesome!

[rousedg]

@yimmy89 Agreed. Once you get to the larger digits, regular lattice multiplication is cleaner - 999*999 produces 54 (!) lines, for example - but if you do better with spatial processing, this method may work better.

Nonetheless, I'd venture to guess that this would work great for teaching young kids multiplication instead of having them do long multiplication - so long as the answer is correct, only minimal emphasis should be placed on the method.

[RKoch75]

Geen zak-Japanner meer nodig...

[hatpoing]

nice thank you

[gc3k]

shout out to public school teachers who just show up to pick up their paycheck

[Skeanful]

now do 9x9

[manhascandy]

This is stupid. I just use a calculator.

[PhlegmMaster]

That's ridiculously slow.

[voltz15]

Since asians are so stereotypically smarter then all of humanity, I'd like to see if they can actually come up with a working formula to divide by 0.

Can it really be done? Who will accept this challenge?

[LOLMAN22]

@voltz15 You mean the Americans...most of the innovations come from US. Operating systems, Ipads, sending men to the moon, stealth planes, nukes....No nation innovates like America

[voltz15]

@LOLMAN22 When it comes to accomplishments and innovations, I absolutely believe you are correct on this as we have a long history of pushing the envelope. However what I said of the term "stereotypical" was meant to be a mockery against all the criticism we've taken of other countries proclaiming they're better then us. On the other hand, I do hold Germany and Japan in high regard on this matter.

[Fichlica]

@LOLMAN22 typical american, no nation is as arrogant as americans

[edgarhons]

@Fichlica Damn right, we're Number 1!

[sthenx0r]

@Fichlica "Americans" aren't a nation.

[jesuinthesky88]

@LOLMAN22

What we think of "innovations" are often only the most stupidly obvious end products of a complicated process of trial, error, luck, and copying of previous methods. No person or country should ever pretend to take full credit for any "innovation".

[CidXIII]

@LOLMAN22 LOL!

[akamushiii]

@voltz15 dividing by zero is equivalent to infinity. Example: .99999999...=1 therefore 0.00000000...1=0 any real number is equal to "n"

n/(0.0000...1)=∞

[Aiphares]

what about 3726x7 ?

[Clyfred123]

@Aiphares I did it, worked like a charm. You just add up from right to left after you've got the numbers. 21, 49, 14 and 42 = 26082.

[MrNokia91]

lol i've used my calculator to prove that (:

[TikiTubeable]

changed. the. fucking. game....

not that multiplication is really all that hard, but still...>.>

[GodFle]

Really straight lines, without a ruler...

[Rob2977]

I guess knowing a little MATH instead of doing lines like counting your fingers..would do this guy some good...

[LudaKiselman555]

Asians.

[mothrajp]

@LudaKiselman555　got a problem with 'em, huh? huh???

[msteeeve]

Is this just matrices?

[NoSwearAnytime]

Ok my calculator said the same :D

[5olano]

21 x 13 = 34 !!!

everybody knows that!

they cant trick me.

[13thMarverick]

@5olano have you finished elementary school ?

[5olano]

@13thMarverick did u ever met someone with humor?

[13thMarverick]

@5olano i have, actually

thank for asking

[ivinyo16]

Too bad my exams aren't about multiplication anymore. :-(

[OzFurBluEngineer]

Wha-wha-wha-whaaaaaaaaaaaaaaaa­aaaaaaaaaaaaaaat?

[croc97]

What the fuck is this wizardry?

[BluPhoeniX7]

trying this next semester

[DisturbedOneX]

This is really cool, but probably not used since it's very inconvenient and would take a lot longer than normal multiplication.

[Drazeon]

@DisturbedOneX Yeha just type in the numbers in the calculator and voila! Answers! lol

[every116]

This is quite ingenious.

[MrCannaBeans]

What. The fuck. 

[Sherlynlwp]

hey what about zero 0? example like 180 x 102?

[varishnakov]

@Sherlynlwp change the problem to 45(4) x 51(2)

[varishnakov]

@Sherlynlwp or rather, much easier, draw one line per number and just label it with whatever value it has and then still do it the same way. Then the zeroes can be treated the same and you only have to make 6 total lines on paper.

[schootingstarr]

how awesome is that? :D

now do 999 x 9999!

[Cumprimentar]

that's pretty cool!

[Nutzername92a]

Wow, this really works. But it takes ages to draw so many lines and count all overlappings :D

[reddemon46]

I feel like Patrick when his mind short circuited.

[HivemyndMusic]

WAT

[dropgigg]

i did understand not a thing. i wasn't trying either.

[jeremymjones99]

Calculator x me = better

[kirriereoch]

How do Japanese multiply? Boy meets girl, girl meets boy. Boy falls in love with girl, girl falls in love with boy. Girl and boy kiss and hold hands. Boy and girl make baby and suddenly, the Japanese have multiplied.

[moschx3]

@kirriereoch 1x1=1 ...

derp! you mean add xp

[niqo89]

calc.exe

[moschx3]

wtf.....ima try dis now o.o

[shashauno]

looks cool but try doing 999 x 989....

[nihongogogo]

@shashauno

81 72 81

81 72 81

81 72 81 81 153 234 153 81= 988011 easy peasy lemon squeezy

[jennystarc]

@shashauno 999x989 988011 is :)

[Razmuz12]

@shashauno I think it would be faster going to Japan to find a calculator

[dukerajn]

@Razmuz12 well, if there's an intense solar flare, or if your place was "accidentally" hit by an EMP wave, you gotta have a plan B. =)

[Razmuz12]

@dukerajn oh yeah, didn't think about that...

[michaelgoggin7]

lattice is still better

[JoanuMostrafta]

...except in the time it took to do this, I was able to do it by hand using the traditional method far more quickly and using far less space.

[mars14127]

well, in Europe, we do have calculators and PC's

[cubeface21]

Your 9 is a g.

[MrTrixxer]

How do you calculate it with a 0, like 50 x 12

[XxCarmelitixX]

@MrTrixxer you multiply by 5 and then add a 0 at the end ;)

[PSNDonutDude]

@Mikkerthebhu1 its more for in the head use. 99(99) would be easy to a veteran of this method..

[C4ExplosiveTalk]

WAT

[l9fps]

He should try 749 x 84...

[Truggy]

not to be a buzzkill, but this seems much more complicated than our method.

[PSNDonutDude]

@Truggy not to be a buzzkill or anything, but this would be much easier to do in the head once used to the method. Visualizing a table and long multiplication is very difficult for most people.

[Truggy]

@PSNDonutDude hm... that's a good point. Maybe it's because I'm used to the american method. still it's very cool. I wish I'd discovered it when i was younger.

[klOmega36]

I came here to see the Japanese multiply.

Not exactly what I was expecting to see.

[megadeathx]

@klOmega36 Nothing kawaii about this hand, huh?

[83alx]

I imagine those people that can do ridiculous calculations in there head are seeing something like this.

[Novacainejunkie]

multiplying level: Asian

[yazf1991]

A nice visual way of doing it, but it's really exactly the same as traditional multiplication. It doesn't seem like it would be much faster either.

[Gwalchgwn2]

first digit: 2 lines & 1 line = 20*10 = 200

last digit: 1 line & 3 lines = 1*3 = 3

second digit: 2lines & 3 lines, 1 line & 1 line = (20*3)+(1*10) = 70

= 273

This isn't genius, it's just mathing with visual aiding ...

[zaruler]

this fuckin genius

[2LeG1TT2Qu1TT]

Wouldn't this kinda suck after you get some 9s and numbers in the thousands though?

[brtlblayk]

why did 8 turn to g!?

[blaxploitation]

Annnnnnnnnnnd How do we know to add the one onto the 8?



[JimiPain]

@blaxploitation Because it's over 9. It's the same when you add something and count it from the top to the bottom.

[blaxploitation]

@JimiPain Annnnnnnnd I feel stupid. Thanks mate!

[constipationnow]

Level: asian

[TheBlotzen]

how does it work with numbers that include a zero?? HELP PLS

[admiralPs]

@TheBlotzen simply don't make a line

[TheDjDeter]

lol I wonder if those ~50 dumb bricks who disliked didn't get the point X)

[fgronzanicancun]

why we dont learn this in school?

[Mofoe2001]

9=g the fuck?

[Metathiax]

@Mofoe2001 It was a 9 with a line under it to show orientation. not sure why the person did this but hey whatever

[TheSargoDarya]

Seriously, it takes fucking ages...

[admiralPs]

@TheSargoDarya faster than without calculator

[Rawfflezz]

WITCHCRAFT! BURN THE WITCH!

[Hugoillo]

wat a shit method

[Gamma1734]

haha, who wants to try 999*999? :D

[laidback1992]

this guy can draw some straight motherfucking lines

[Jamesey162]

@laidback1992 you might be surprised to learn that drawing a straight line is all in the forearm and the elbow.

[WhyMex69x]

@laidback1992 probably a girl then.

[DaemonAnt]

Mind = blown

[tramen]

all i can say is hooray for my Iphone solving my math questions!

[staphinfection]

It was quicker for me to do it the traditional way than for this person to draw it all out like that... And what if there are digits like 8 or 9 in the equation, that will take so much longer to draw out.

Don't learn this technique, it isn't a shortcut.

[DanielJosephBattista]

Nobody said it was.

[Alytoner]

I agree that the normal method is easiest, but learning this method can teach your short tricks in doing simple math very quickly without even needing a pen.

[JaromaBeats]

hooly shiit O.o

[Danagle42]

So does this only work as long as the digits are less than a certain amount? For example, this seems tedious as 19 x 22 because of the presence of "9"

[TheAznSteph]

chinese NOT japanese...they always seem to steal everything and call it their own

[ScuderiaPham24]

@TheAznSteph like what?

[rabbit54]

@TheAznSteph ha now it's the other way around

[levithao]

what if it is 9876x 6789?...

[JimmyKinY]

or you can just use a calculator ?! :L

[brinkthegamer]

poor guy, someone buy him a calculator.

[leonidoko]

WHOATTTT ?!?!?!

[JustPunkd]

Why don't they teach this in our schools?

[AidenLuong]

@JustPunkd like we are going learn it lol

[JustPunkd]

@AidenLuong Actually it's pretty easy. All you have to do is count the amount of crosses between the lines after watching the video once I get how it works. In school they tried to teach it to me for years and I was never sure how exactly I should calculate big numbers...

[Crilen007]

@JustPunkd Because the text book doesn't say it.



[fyaan0]

@JustPunkd Because there are easier/faster methods

[roadnate]

@JustPunkd Because it takes longer than other methods?

[SolidSquid1]

@JustPunkd Schools can't afford the paper it'd cost

[MaxWinchester666]

@JustPunkd

Because when you can draw and count lines you probably understood nothing about maths...

[nintendofreak44]

@JustPunkd Because teaching something smart and useful is school just isn't their style.

[DanieleGiorgino]

@JustPunkd

Because it's inefficient. 

[4462892Perez]

@JustPunkd The goberment needs their population to be stupid in order to make stupid laws get passed and other things.

[lauren1michael]

@JustPunkd too bad it's actually faster to use the "American" way

[narmstrong80]

Nice, a way to multiply numbers that take 4 times longer than the standard way!!

[Oscarcrazy2112]

MATH LEVEL: ASIAN

[procnet1]

@Oscarcrazy2112 Thats racist!*picks cotton,eats fry chicken and watermelon,blames whitey, gets AIDS, sings crap rap and drinks malt liquor!*

[eis82]

@jacky817 - i've tried with bigger numbers, and it STILL work!!!!

[jacky817]

What happens when the numbers in each digit is bigger? like 98x87?

[rayner1902]

How do i draw the lines if i need to do this: 78*98*67*49*12*123456*987654?

[jacky817]

@rayner1902 Even normal calculator cant show you the answer to that haha, too many digits