NO Calculator! or How to Multiply Quickly

[animecrazy102]

...What? That's so weird!! I really am excited to try this out...lol :P

[AJFlLMS]

I dpnt get thos quite? It works with low numbers but if its like 163x128 then how do you dp? Please help!

[itoronto1]

@AJFlLMS It can b e done using the same technique but it is very tedious

[sanctuary0o0]

brilliant :D

[sparky10099]

im trying this in math class and show my teacher haha

[superinzaghi9]

Im gonna do this on my Maths test to make the examiner think WTF? how did he get the answer with that LOOL

[ziounjb989]

what about 275x685 would it work? can you make an example for a larger number like the number i just put down thanks in advance and MerryChristmas.

[sammelief1]

cool

[sammelief1]

nice

[so0onastyyy]

they should teach this in school

[ScrewAttackChina]

this trick slower and takes more space than the traditional method..

[cokbagus23]

thx dude it totally helped me

[gchain]

i dont get it, simple as that.

[gxcad]

heheh...neat trick yes, but the title is misleading, since this is not quick at all. Infact, it is SUPER SLOW. But it does work and its pretty cool.

[shayzilla09]

WHOA-my algebra teach. is gonna FREAK OUT!

[halllashalllas]

try to calculate 976*867 lol, gl :)

[Ghastall]

Not sure how many people realize it's just a visual picture of what multiplication is essentially.

[MrSamuelPascal]

umm...

[klaraine1515]

that is awesome!!! My little brother has a horrible time multiplying im gonna teach him this but how do you mak it work with 0s??? like 10x10=100?

[itoronto1]

@klaraine1515 zero is a blank when involved in any technique the character "0" is just a place holder

[numan112]

Really good trick i love it !!!

[ziropiron]

Here's an easier method:

20*13 + 1*13 = 260 + 13 = 273

100 * 321 + 20*321 + 3*321 = 32100 + 6420 + 963 = 39483

[smilexa]

wait... WHAT

[jacksawild]

I hope people don't use this to calculate fuel requirements in aircraft or something. No internal validity.

[itoronto1]

@jacksawild It is very transparent and valid. It is too slow for the size and accuracy for those calculations. Essentially a computer does this but very quickly.

[RandomRomance1]

U could just use the working out u learnedd in primary school xD

[Lolhesfat]

I tthink ill go with my way

[lidyaFACE]

alright, my kid never has to learn the multiplication tables.. just straight lines

[debb0r]

I must be stupid, i tried doing it with 29 x 38 , but I got lost hahahahha

[binasheikh1974]

Man...watching it was fun...sure an gonna give it a shot. But how about zero's? As in120*302?

[itoronto1]

@binasheikh1974 Zeros are blanks - "0" is just a place holder.

[ALMILLIONESTOY]

BORING !

[mohamedhakkmed]

what happens if the number of knots is higer than 9 ? lets say 888 x 888 ... then 8 lines have to cross eight lines .. which is what.. 64 knots?

[itoronto1]

@mohamedhakkmed follow the instructions on sums greater than ten

[My6T1]

Can this method be used with decimals?

[itoronto1]

@My6T1 don't recommend it although it should work if you can keep track of decimal location

[lovedarli]

Nice! Taking abc being a number such as 123, a=1 b=2 c=3, then multiplying each number separately to another number def 234, so ad, be, cf, same way most people do it in their head but instead using intersections in lines! That is so clever!

[dummknie]

It's always good to know another methods, but this is to slow for me(in these days you often use a calculator and if you don't have one at the moment you can multiply faster in the old way)

[Skorpion11100]

Ok now i believe u because I did this with a calculator while u were doing it

[Skorpion11100]

Nice u made it soooo easy

[LacuinFamily]

I must say, your a genius!

[Zokunei]

I like how this clearly takes longer than normal. It's sped up like twice as fast.

[rentaraman]

I like it but im guessing it will get difficult with larger numerals like 9s say if you had to multiply 999x999. This must be why the examples were done with lower numbers like 1, 2 and 3

[OldTimeyJunk]

nice! I havn;t watched the whole thing but'll it 'll come in handy for tests.

[Auszie]

Combine this trick with the “Lattice Algorithm” and you will master multiplication in just one night. I’m 20 years old and I NEVER understood math until now and because it was not presented to me in a way that was compatible with my own individual learning pattern (visual). Now, I understand it ALL in just two days of applying “unorthodox methods” like these. If they work for me, they will work for ANYONE!!!

[iTyGuy32]

What about 2 digit and 3 digit? like 23*342 for example

[itoronto1]

@iTyGuy32 just follow the technique - it is explained

[muhaimen123]

All im sayin is WTF!!!

[piotroo1984]

super film :P

[RainHearts21]

I wish I learned this trick sooner.

[shimesaoshi]

nice one... but cant be done with zero

[itoronto1]

@shimesaoshi yes it can - it leaves a blank

[jackie6197]

how would say 60* 89 be done. my answers are always wrong



[itoronto1]

@jackie6197 need to still keep a place for the blank or zero

[candyisasweet1]

This is AWESOME!!! Thanks!!!

[BaltoMovie]

Some people can be geniuses with A+ averages and still fail math class

You must 'comprehend' the basis of mathematic not just memorize times table

[RoryDangerCox1]

damn!

[RoryDangerCox1]

holy shit!!!

[Staggger]

i saw something like this, but it was in thai...

glad i found it again, in english!

[solacevy]

wow i can use this as my teaching method!

[Tenshionnanoko128]

3367855377 x 126546847??? :D

[itoronto1]

@Tenshionnanoko128 possible but unrealistic

[Retroshooter123]

can anyone tell me how itoronto1 solved it by drawing a half circle to count?

[itoronto1]

@Retroshooter123 read the notes I did not do this I solely posted it

[goalsavior]

@Retroshooter123 you add the diagonal

[xFallenAnjelx]

@Retroshooter123 They didn't, that was just a visual to show you add those intersections.

[rajivkrishnatr]

but its time consuming...:(

[moseley93]

thats amzaing!

[kmvg22]

i WISH i knew about this when i was in mid and high school

[MicroPowerist]

Umm... I guess doing the proper way wastes less time...

[tonyma90]

wow this is very impressive lol, i never thought about a visual way to do multiplication, this really enlightened me haha thx

[domehgt]

nice trick. kinda cool and handy :)

[kyelolo123]

complicated

[UndeadManiac666]

lol im 13 and i use it as a cheat for maths class =D thnx 4 the vid =]

[DarkPhychic]

This is taken from hinduism knowledge.

[WHiPCPL]

wow... I don't plan on learning this untill next year but i have to admit this is an amazing way to multiply

[sharall]

wow, i have never ever been good with math, multiplication has always been very very hard for me, but i tried this, and wow, all i can say is thank you.

[hdhdththdndr]

Next Einstein came up.

[12edDemon]

Regular multiplication is less complicated and quicker tho...

HOWEVER, extremely clever

[ArosIrwin]

That is awesome!!! I can now multiply large numbers! It's insane! If only I'd gotten there before I did my exams. I might have been able to use it. :-( But awesome none the less! :-D

[twisterfield651]

no

20 x 10 = 200

1 x 3 = 3

the answer is 203 i got that in 3 seconds not 1:13

[wwwKx]

LOL Try 9879 x 7869 :P

By the way, it's awesome :D

[Tennant909]

great video!

[TheScottishTom]

brilliant

[Samsasrenjet]

Isn't long multiplication faster?

[hodgeon5th]

How is this good? I did it the regular way and was finished in half the time??

[JCBiden]

Awesome!

[carolinabonita1]

Great to know this!

[antumarin]

AWESOME!!!!!!!!

[mywayforum]

It's awsome !!

[abbyguy]

Very clever, I like it!

[nerdysock]

Well this is harder for me than regular multiplication , but i guess it helps out those of us who are "visually based"!

[xperfectmessxx]

i love you.

[VampireV30]

Wow, ive never thought of it that way. nice! hahaha

[SolidSnyder]

This is awesome!! :)

[SolidSnyder]

This is freakin' awesome :)

[andrewtrahan012]

Thanks this videos amazing i used this technique on my highschool exam and got a 97

[gucigucibubu]

awesome! :D

[FireSign27]

The catch is, this method only works when multiplaying 2 numbers which have the same number of digits. EG:

2345 x 1234 can be done. BUT

123 x 4321 can not.

[p3rUvIaNSoLdI3r]

:-o

[ErnestGjoni]

awsome

[Cheezwizhi9]

thats cool

[CODWiiReflex]

Even better trick, Use a calculator. lol nice video

[crystaleye55]

this would be just annoying with higher digit numbers like 999*888

[medexamtoolsdotcom]

I like to do convolution of the individual digits in my head. And to make that quicker, I take the fast fourier transform in my head, multiply the complex numbers of the resulting two functions together sample by sample, and then take the inverse transform and then do all appropriate carry operations. No, I'm just screwing with you, I can't do that. But I did manage to multiply two 4-digit numbers in my head once (they were a permutation of the digits 2 through 9 so they weren't easy either).

[lysolmax]

this is rly cool but... its 5x faster to just write it out the normal way. i raced u and had like 15secs extra time left.

[eskimokid]

That is brilliant!

[Tindanin]

GREAT!!!

[anshbadshahh]

hey i can multiply much faster than drawing so many lines

[MrRhinoman09]

thanks man u realy helped me out here

[MrRhinoman09]

thanks man u realy helped me out here

[X39280]

i dont get wat u just did

but it looks cool :)

but i still dont get it...

[MrAndythoms]

wow that crazy thanks for the video

[vagelis17y]

this is f*cking amazing! nice trick man!!!

[forephuxsake]

THIS IS AWESOME

[frampy91]

I like the video

People don't realise that its not for your average person. It's for people that have difficulty with maths, and as the annotations says, for people that are visual based

[itoronto1]

Thanks for the support

[Curixq]

I think it's easyer for everyone, but indeed, some may have more difficulties than others to get this.

[streetster20]

It works. BUT what do you do with 0's? lol. say 1010x304 how do you do that? OR 1000x125043 but otherwise it works.

[itoronto1]

either leave a gap or make another mark to show the gap

[itoronto1]

go ahead do it and post

[krazykatkitty]

amazing, who's invented these?

[Twist9]

Thank you! I like! A good tool for double checking your work.

[qwertyma733d]

cool

[ursogayidie]

how do you know which numbers to do(the order of the numbers)??

[itoronto1]

Same as all of our numbers!

[HyperbirdF6]

its a good method, but im sorry, i worked this out faster using the normal method, and finished in time to check my answer on the calculator before you finished.

but its a good alternate method anyway

[itoronto1]

Some folks have a hard time with the conventional method

[drummerboyjmw]

BOSS thats easier than looking off the person who's sitting next to yous paper

[SammyE89]

Okay, so you add up the digits of the first number and then you make that amount of lines....

I still don't get how you count the lines though.

Looks like an interesting method though.

[itoronto1]

the video shows that

[ausernameDx]

gah. its confusong when people write their "9's" and it looks like a "g" to me -.-

[itoronto1]

that's a cultural issue

[pyrowdadon]

i see this really works ..i understand the first part but dont get the second half

[itoronto1]

view it again

[BwalkCwalk]

1 word wow :O

[eziad85]

LOL! comon.. its faster to do it the ordinary way!

[saailaway]

wow even though that would probably take longer, that is pretty sick!

[pinkyloveme888]

trey do 789x987 -.- waste of space....

[itoronto1]

best with small numbers but it can deal with large ones though not as quick if you understand standard math

[LXXITobinator]

just make 4 intersection lines and wrighte the names of the digits its easier than writing all the lines..if ur dealing in 10s

[eklc2]

damn i dont get it! .. of cause with the numbers of lines but where to count them?

[itoronto1]

view it again

[ricky0633milano]

QUICKLY..??

do you seriously think this is fast...?? 123

x 321

----------- 123 246

369

= 39483

i spent 15 seconds using my method and you spent 1 minute by drawing all these lines

*sorry...didnt mean to be offensive...=P...*

[itoronto1]

some folks have difficulty with numerical concepts and require visuals

[RSsipthis]

Wow. That's really cool. Although for some 3 digit numbers just standerd math seems better.

[aefuer]

y dont u just do (20x13)+13

[itoronto1]

some folks don't understand that you restated 21X13 so doing what you wrote will not help them

[suzalulusasunaru]

hi! can u show the instructions? pls.? dont be mad at me!

[itoronto1]

Annotations have been added for you assistance. I may move them to sub-titles to allow translations.

[LhizYchan16]

Well, can't understand please teach me how.

[itoronto1]

review the video with an open mind

[THABO99]

dont mean to sound dumb but i dont get it

[itoronto1]

review the simple video with an open mind

[dch020]

that's not fast. this is what we're taught at school: 21

*13

---- 63

21

273

[itoronto1]

your point is?

[faithfulrun]

lol, the video is sped up too

[kubilay5t]

nice

i can math very good and fast , but now .... its amazing

[MissCheekyCow]

okay, you all think its not practical, its not quick enough and so on --- I think it's brilliant. I have always found it easier to see maths as a graphical thing, something almost touchable. As soon as it gets too metaphysical I'm fucking lost. This is something that both amazes and fascinates me. Very odd feeling! Thank you for this, Itoronto1, this made my day and years of maths I couldn't stand in school much better!

[CrazyAxelStyle]

does it work for any numbers?

[itoronto1]

generally best with small number if digits otherwise yes but really confusing for big big numbers

[shadowslave4]

not very fast, in my opinion, but I good trick for parties lulz

[amitlzkpa]

I tried that with a lot of diff nos.(no digit was bigger than 5), but the answer wasn't perfect for some products

[itoronto1]

misplaced lines, or you misplaced the curved lines, miscounted your lines

[juanmauriciocarranza]

que pasa con el sonido?? no audio??

[itoronto1]

no audio required

[gamemeister27]

if your going to draw that many lines, just use lattice, lol.

[asuodhfaouidfoadfj]

how did you find out that? :S

[aae30002000]

its cute .. but definitely not faster than the calculater will be so horrible complicated for small numbers like 7 digits ..

for examble 6666666*3=?

1- 6*3=18 write 1  8

put in the middle there addition 9(1+8) repeat it 6times since we have 7 digits ..

=19999998 .. i guess u would take the night multipling it while iam sleeping houres ago! lol just kidding .. keep tring let us see ur awesome work ..peace

[itoronto1]

True

[zbzmtf]

god, the one thing i can't calculate is this , (for example) : 350 x 220 what do i have to do with the zero's

?? plz help

[itoronto1]

you will need a symbol to represent the naught to allow you to add digits into it if required and to show in the answer

[soldier9599]

very clever, but I could probably do this in my head just as quickly

[wanda190]

idk this seems a bit complicated....

[pweetz16]

thats wicked mannnn

[greekjohnny3]

WHATTTT THZ SO MUCH