akitaro
2190406
12888
225
Chinese multiplication method
Apr 15, 2016 10:24 PM
akitaro
2190406
12888
225
IJustNeededAUsernameSoThisIsIt
People who find this amazing, never understood math.
TheresAGermanWordForThat
Man, they just stopped the one child policy and they're already multiplying?
bromanbro
deserves to be top comment
brojoe111
American multiplication method: pull out calculator
tomoko2015
Now do 687*958. Better get a large sheet of paper.
reallyolddispatcher
What is this? Communism Core?
chaoguy2006
No this actually works.
Engelic
*raughs*
superheavydeathmetal
1fromneptune
I'll stick with using my toes since my elementary school teacher told me not to count with my fingers.
eakerjam
Gonna need a bigger cheat sheet.
AlmostAnAttorney
I mean that's cool if you're a communist.
BluePhoenix9901
Well, I'll be damned...
trekkiegirlt
Amazing
HamsterOnAGoat
this seems unnecessarily complicated
cousteau
No it doesn't. It does when you go to larger digits.
AceOfShovels
It minimizes actual mental math for visual learners that have trouble with abstract concepts.
AuroraNora33
If you can draw the lines more quickly and ditch the circling and marking, you'll do this in no time without thinking too much about it
DarkKrieg
13*21: 10*21 = 210. 3*21 = 63. 210 + 63 = 273
StarrrryNight
This looks like utter brilliance to me. I love it. I'm terrible with my multiplication tables but I can draw lines and count up to 15.
Glidingboulder
Its one method more than we need, the one way I learned in 4th grade does just fine. Probably does fine for everyone else too.
youblind
Explain. My 4th grade teacher sucked i guess... and it was 20sum years ago...
Vulpinologist
Those crafty Chinamen.
LickMyPoliteCanadianbeaver
Turns out I don't understand math in any language.
Dudeimus
You and me both! Hahahaha!
MrsTitsMcGee
As a very visual learner, thank you.
cleetdog101
Ditto this meshes nicely with my ASD.
MrsTitsMcGee
♡ mine too ; b friend!!
DarkTobleroneShadows
This is basically just a variation of the FOIL method: 13x21=1x2,1x1+3x2,3x1=2,7,3 (273). 14x23=1x2,1x3+4x2,4x3=2,11,12=2,12,2=3,2,2 (322).
Knillis
What sorcery is this and why didn't they teach me this in primary?
TheSkeletonWar
You're a FOIL method.
HamsterHuey
Well said!
OneZebraInAHerdOfWildebeests
I think the Chinese's is simpler and better
TheWholeBlueberryExperience
Multiplication is simple. Don't need a graph system that may not work on all numbers.
springelmogizmo
260 + 13
BetaLactamase
So many toes. I'll have to dip into 2nd and 3rd cousins to figure this one out.
SaltCollector
You guys are such idiots, it's 283...
benjamitex
"Multiplication method"
yourmomisminenow
shit this was way easier, I did 21x10 +3x21 I mean same result but yours is double as easy.
OneZebraInAHerdOfWildebeests
280 subtract 7... 273
DammitTodd
210+63
surfvvax
9
FlashlhsalF
At least 6
Crowlands
You are technically correct. the best kind of correct!
InfectPlayer
Well, you're not wrong...
Cuntortionist
I'm proud of myself for doing this myself before the first set of lines stopped moving.
jugRn0t
I had it done before the lines started. I can see the value in this if you can't do it in your head. But don't force this on kids who can.
Cuntortionist
I remember being forced to do it on paper the "traditional" way as a kid when I was great at math.
jugRn0t
Yup, same thing
zsnider16
273
CatIRS
Are we doing addition in base 10 or base 8?
cousteau
Yes.
KickMeElmo
Base 4096
ionlyunderstandsomereferences
I'm going to need a lot more symbols....
CatIRS
Username relevant
Glidingboulder
273!
DicksTakeDickpicsWithSelfieSticks
273! = 1.34 * 10^548
thornus67
No. 273. Not 273! No need to bring factorials into this.
cousteau
273!! (that's less than 273!)
Glidingboulder
I know i failed maths no need to rub it in. XP
IcyLucario
Everyone is saying its harder and more complicated. As someone whos shit with numbers, this seems easier.
johnnydagreek989
I know right? This is much simpler to visualize in my head.
decentideaspoorexcecution
Why was I not taught this?!?! As a super visual learner, goddamn, this would have been fantastic to know...
lawrus
Because this doesn't teach number sense
Greymoore
Next time I can't find a calculator, I'll pull out my phone, bypass it's calculator and find this
Freskitah
I'd probably take hours trying to just get the lines nice and straight
Wakborder517
You're welcome.![]()
ninmonkey
I actually have ocd -- and those pictures do nothing to me.
rustyeh
Chinese shouldn't multiply anymore. Have you seen how many there are!?!?
FactChecker101
Grew up in China, never seen this lol.
DaJing123
I am Chinese, I don't think from China, never heard of this, more complicated
bigblindguy
Yeah this japanese method and OP is a stupid ethnocentric cunt who cant you guys apart :D
ALoneTenno
If you're a big blind guy then how can you tell what you're typing? 0.0
bigblindguy
Blind method.
ALoneTenno
Imma google that. It sounds incredibly cool!
bigblindguy
its a joke: really I type and my dog doesn't like red so he barks if there's an underlined typographical error. Super simple stuff.
EddyQI
Chinese here too, this is unheard of horseshit
BangForTheBuck
I believe it's vedic in origin.
iGeography
It's mayan
causeimagoddamngenius
Way to drunk for this
shmemsta
yes same
superheavydeathmetal
^too
causeimagoddamngenius
Grammar goes out the window as well
AndBippityBoppityBoobs
Yuuuup
Vimry
... I actually understand this. I've never been able to do multiplication but I actually understand this.
ALoneTenno
Same. For some reason, it makes multiplication easier for me xD
lawrus
Because it's a simple algorithm
lawrus
Do you understand it, or do you understand how to do it?
kurmathephoenix
Because ur a visual learner .. This kind of teaching will quite literally transform not only teaching but people's conceptualization of math
zagibu
Unfortunately, not everything can be visualized. People who rely on visualizations will have lots of problems with some adv. math. topics.
fizyx
Sounds like you're a visual learner then! A lot of visual learners can have problems with more abstract concepts without visualization.
StarrrryNight
Same, this is utterly brilliant. I love it
TheBeardedDragon
Look up Napier's Bones for multiplication
fizyx
Mathematician here: This is the same as the normal algorithm you were taught to use in elementary school, just with a visualization
thattwoguy
Thank you for saying this.
PotooGeatAndWise
I don't remember shit. Drugs are bad.
nutellamadness
They weren't kidding when they said people learn in different ways.
nutellamadness
As someone with extreme difficulty with numbers.. this visualization technique would have helped a lot.
Burritotacotime
It was confusing the shit out of me until I realized they were doing it the exact way I would do it, but with numbers and not all f-ing dumb
ambisean
Everyone learns differently and some need a more visual method, thats where this is handy.
Girtouh
Learning images is easier than learning singular numbers, according to sience -> Better (yet more time demanding) than the traditional ways.
Flyingtowing
Not mathematician here(mere mortal, actually): still kinda cool though...
TemporaryUzername
not ever curriculum teaches visual algorithms for basic multiplication- we're taught numerical formulas- so this could be a big help to some
KawaiiTwat
As someone whom can only learn by visualization this should be used more often in schools instead of calling us stupid for not getting it.
atlaskennedy
"FOIL"
SilentAitch
MathMAGICIAN more like
Improbabilitydrive42
As someone who has discalcula, and told I was simply a moron, (by teachers) I was never taught this. Would've helped.
BoxesofFoxes
I was taught to memorize a chart in school.
Etal00
Thank you. This method would be helpful for visual learners.
MsMax75
And it looks less complicated as these nice animated numbers slide around the screen and magically change. But students would still have
MsMax75
to regroup and cross off numbers to change them. So it's basically the same as the algorithm but with you have to draw all the lines.
MsMax75
Visualization is important. But there are less abstract ways to represent multiplication that really help students understand the value of
MsMax75
the digits.
ninmonkey
It's like when you move to binary and hexadecimal. It works exactly the same as base-10 (decimal).
DopesMalones
Yup. Lattice method still my preferred 'by hand' method.
MsMax75
This isn't exactly how I learned the lattice method. Is this how you learned it?
DopesMalones
No, but it's the same principle.
IPutAHexOnYou4c6f7665206d65
do you do online tutoring or something?
demonjester1515
Sure, but this visualization makes a heck of a lot of sense, pretty easily.
itchyPUSS
Mathematician.. Tic Tac Tition.
DavidNightingale
This is the same as the normal algorithm you were taught to use in elementary school with a visualization.
MrFnortner
Another gimmick. You learn nothing from this if you are taught it by rote, which is the way most will learn it. The stupid are still stupid.
notofthisworld777
No dude....it's clearly not the same. This method uses no "multiplication". This method uses only "addition" to find the answer.
wickld
You do know they're the same thing, right? You're just being silly. 7×2 aka 7+7
MsMax75
The dots represent the multiplication.
RoryShade
I just remember being handed a chart and told to memorise the chart. I did not memorise the chart.
IMayOrMayNotHaveTroubleFindingAndOrChoosingAUsername
Amen.
hoofbeatsandsnowflakes
yeah I was just taught to memorize math. and then they tested us on how fast we could multiply numbers and if you were fast, you got prizes
EricTyldisfunction
Same, my teacher called it a monster minute. Most terrifying minute of my life. Mostly because I was the slowest writer.
owlest
the chart is for 1 to 9, you need it to be able to do any multiplication
ambisean
I always got the 1-12 charts and ya we were told to memorize it... my memory is no good.
CrowbarCommando
Never memorized the chart and can do multiplication just fine.
owlest
I'm not sure we are talking about the same chart then, I didnt go to school in the US
CrowbarCommando
Neither have I. And what other 1 to 9 multiplication chart is there? Base 16 or something?
Feench
I did. I know everything from 1-12 pretty well but as soon as you tell me to multiply something by 13 you can go fuck yourself.
PolishSpaceProgram
I remember 1-12 and 16.
EndangeredTang
Same! I sped through those timed tests in elementary school. But then middle school came and ruined everything!
MrRadthorne
You just have to break it down into bits you can calculate. 16*13 becomes (16*10)+(16*3), 16*3 becomes (10*3)+(6*3), so
MrRadthorne
the end result becomes (16*10) + ((10*3) + (6*3)), or simply put 160+48=208. idk about anyone else, but to me this is the simplest.
GaugeDanger
This is how I do it too. But I visualize weird blocks in my head so I don't lose some aspect of the calculation.
Rovylern
Distributive Property of Multiplication Over Addition FTW!
nejvek
Yup exactly how I math too.
kurmathephoenix
Yes ... But u do realize the importance of visualization in education right ?! This is a HUGE leap
tooncesthecat
It's not. I think it's rather confusing.
fizyx
Oh, I completely agree. But people were treating it like some new, scary thing, and it's not at all. They just don't know to connect it.
hereforthensfwreddits
Is it bad that I was definitely taught the western way and I was able to make sense of this? It's actually really cool if you don't have...
hereforthensfwreddits
a calculator
kurmathephoenix
I'm not against that point
buffOrpington
Ethiopian "binary" multiplication method is a bit shocking when I show it to students. Much harder to connect to the decimal algorithm.
marvison
FANCY WORDS
LickMyPoliteCanadianbeaver
You lost me after Ethiopian.
kurmathephoenix
Teaching like this is going to transform not only teaching but our understanding of physics itself ... Less than 10 years
SciGuy
They've been teaching this sort of thing for well over 10 years. It's just less efficient multiplication.
erowud
How do you figure that?
kurmathephoenix
How would you not figure that!??
kurmathephoenix
Well how do you think we know stuff? We teach future generations what previous ones have learned. Changes in education change human knowledg
solarshado
Next do 56*98
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ninmonkey
http://s2.quickmeme.com/img/3f/3fcded7cf7f48bc77d1512ce3f3e8d26264316ad2f68462a762a01f9e79094a8.jpg
SoulHeart
I got like this app on my phone that like you put in numbers and stuff, I think it was called dial, or calculator.
ninmonkey
Even google does it without searching
ekiwok
(a+b)(c+d)=ac+ad+bc+bd=(50+6)(90+8)=4500+400+540+48=4900+588=5488 this is what happens on gif
cousteau
You make no idea how glad I am this was already top comment. This method is stupid and it's only useful as a demonstration of how × works.
QueefMuncher
You will have to subscribe first.
FieryFarts
naw 17*38
SpiderSpud
Why
TheBeardedDragon
Napier's Bones
DarkTobleroneShadows
See my FOIL method comment: 56x98=45,40+54,48=45,94,48=45,98,8=54,8,8 (5488). This method is legit in my opinion.
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DarkTobleroneShadows
What about bag phone?
BassTapir
I don't understand, do you have a link where this method could be explained slowly for dummies?
BassTapir
Nevermind, did the research:https://en.m.wikipedia.org/wiki/FOIL_method
baronridiculous
9,878*3,489:
kurmathephoenix
It's sad how few people realize the significance of this kind of leap in education
Kircala
it took me a hot second to figure that out but now it makes sense and i feel like i just had a brainsplosion. thank you :D
UrsaUrsa
http://s2.quickmeme.com/img/b3/b35752503f513336b68f5a7ed6270b74a12b4a0b85b96492897bad39d5fda085.jpg
Coldstreme
I'd rather just use 4 seconds to figure it out with a calc
override367
in 20 years we'll have things in our ears translating any language and automatically doing all math for us
FsImgur
A pencil?
IdkManButItKeepsMeUpAtNight
Good thing someone else already did all the hard work. Let's just eat pizza and watch Netflix.
PopatoMc
But will we "Netflix and chill"?
ADMIN1337
Ok
dogneely
Easiest way for me is 56*100=5600 and then subtract 112 (56*2) 5488
ChandlerBall
Common Core! Way of the future!
whatisabae
I had to explain this method to a college math tutor. She didn't understand how I did simple math so quickly in my head
HouseOfEvil
I just use the calculator that I carry around with me all the time.
dogneely
You me a cell phone with a calculator app?
HouseOfEvil
That's right. Take that, Mr. My 8th Grade Math Teacher. You were wrong!
litelbrown
Whoa whoa whoa, get that common core stuff out of here!!
victorged
Interesting factoid - that form of rapid approximation is what a lot of those "weird" common core exercises are trying to teach
mrgoggles
Distribution property! That's how I do my mental math
victell
Whaaa? I thought I was the only one who did this!
ChandlerBall
Common Core! Way of the future!
Chev8t8
Even easier than all this is lattice. Shame they don't teach it in the US.
lulurafa
They do....they make you stop using lattice after 6th grade, but you use in the grades before....
ermahgerdertsahnerd
That is exactly how I do mental math. Simplify the problem and correct. I do the same with percentages.
PopatoMc
There is so many of us.
dreksontar
And decimals bring it out to whole number then bring it back down.
Chev8t8
What they should be teaching is lattice, it's a far cleaner, quicker, and more compact way to multiply than this.
chemistsdoitintesttubes
We just learned a similar method for taking indefinite integrals. Its amazing how math, at its most complicated, is really just as simple.
ulaczymi2
Yes. Much of math does look daunting initially but is often based on some simple but clever ides.
Nephus
It was the notation that terrified me initially. Like learning a whole new language. I'm still annoyed at all the dv/dt notation out there.
Boredashell
Its because of this mental math I got a lot of 0s in school. Could finish my Algebra 1 and 2 work in 10-15 minutes. In a near 2 hour class.
MWisBest
"""Show your work""" the most frustrating 3 words I ever read/was told during school. Ugh!
Boredashell
Yeah. It took a few months but I proved I wasn't cheating in any way or using a calculator. Then things just ended up getting weird.
NotTheUserYoureLookingFor
As an engineer, "show your work" was the equivalent of "take 10 times longer for no reason"
Reykja
Easiest way for me is using a calculator
Euffy
Calculators aren't magic, they would work here because this is a simple multiplication question. Have a five step word problem and your (1)
Euffy
calculator will still help, but only if you type the right questions in. You still need to picture the numbers and know how they relate. (2)
OneZebraInAHerdOfWildebeests
brain will implode into a vortex sucking up all that is matter. (2)
Euffy
That was wonderful