- By: Akahad
- Subscribers: 45
- Updated: 24-Jul-07
- Videos: 5
-
International
- Comments: 119
- Views: 2,171,656
- Added: 16-Nov-06
How to transform a multiplication into a simple counting of points through the drawing of a square shape (original analogy was with a stool). It works with any numbers if you keep the right partition. If you use a zero, use a dotted line. When a dotted line cross another dotted line or a plain line, count zero. You can verify with your calculator!It's only meant to be a funny trick to show to kids not to be an efficient way to do multiplication.An application of this trick can be seen at:http://www.metacafe.com/watch/339625/easy_graphical_fractions_addition_subtraction_trick/check our new video: http://www.metacafe.com/watch/410784/eating_fire/
Easy Graphical Multiplication Trick
- The title is innacurate but i can't edit...
It's not a way to make mental multiplications easier, it's just a fuuny way to resolve graphically a multiplication. It's only meant to be a little trick to show to friends and kids who hate maths. It's NOT meant to be efficient as some seems to think. You can do any kind of multiplication with it but yes it's boring to draw numbers like 8 or 9.
By Akahad 1164108610 Reply Spam [+29] Moderate Up Moderate Down Remove
I didn't invented it but i would proud to because it's simple esthetic way to show the basic mechanism of a multiplication. You need to be quite clever to make this kind of trick.
My girlfriend learned it from some math teacher during her school years in china. He wanted to make kids interesed in maths and it worked. (In some china school, kids use stools to sit. That why he used this comparison for the shape of the network).
For all those who talk crap about this video: This one of the highest ranked of the week and one of the biggest gain of the producer program in such short time. I made 2000$ in 4 days. If you're so good to put disdainful comments, why don't you make a better vid instead of wasting text here ?
For those who enjoyed it, keep having fun! :) (new video coming soon)3244708- 0
- Beat the MATH
$2000 in 4 days? Nothing can beat that math... HAHAHA!!!
By Baganagta 1164209601 Reply Spam [+16] Moderate Up Moderate Down Remove3382776 - 1
- EXPLANATION
21•13 = (20 1) (10 3)
By daniel7 1172280916 Reply Spam [+3] Moderate Up Moderate Down Remove
= (2•[10] 1•[1]) (1•[10] 3•[1])
= (2•1)[10•10] (2•3 1•1)[10•1] (1•3)[1•1]
= 2•[100] (6 1)•[10] 3•[1]
= 2•[100] 7•[10] 3•[1]
= 273
In this case, for each number the first drawn lines represent 'tens', and the others represent 'units'. That is:
21 --> 2 'tens' lines (10 10)4482865 - 1
- EXLANATION (cont. 1)
In this case, for each number the first drawn lines represent 'tens', and the others represent 'units'.
By daniel7 1172281031 Reply Spam [+2] Moderate Up Moderate Down Remove
That is:
21 --> 2 'tens' lines (10 10)4482865 - 2
- EXLANATION (cont. 1)
In this case, for each number, the first drawn lines represent 'tens', and the others represent 'units'. That is:
By daniel7 1172281177 Reply Spam [+2] Moderate Up Moderate Down Remove
21 --> 2 'tens' lines (10 10) and 1 'units' line (1)
13 --> 1 'tens' line (10) and 3 'units' line (1 1 1)
Intersecting: (2 'tens' lines x 1 'tens' line) = 2 'hundreds' intersection points = 200
[That is: 20*10 = 200]
Intersecting: (2 'tens' lines x 3 'units' lines) (1 'units' line x 1 'tens' line) = 7 'tens' intersection points = 70
[That is: 20*3 1*10 = 60 10 = 70]
Intersecting: (1 'units' line x 3 'units' lines) = 3 'units' intersection points = 3
[That is: 1*3 = 3]
TOTAL: 273
Similar for the second example.
4482865 - 3
- KEEP IT UP !
Well answered bro ! I would never believe this simple video would go this far. Congratz ( and thanks to your girly ;) )
By skrik 1164152766 Reply Spam [+1] Moderate Up Moderate Down Remove
Cant wait for the next video ( another secret from china maybe ? )3259664 - 1
4 telling me this trick i caN JUST USE THE TRICK WHEN MULTIPLICATINg
By zeozord 1166703262 Reply Spam [+7] Moderate Up Moderate Down Remove- 0
Thats very useful trick i like it man great job
By whatsupman143 1165283533 Reply Spam [+7] Moderate Up Moderate Down Remove- 0
Instead of you all being such a "good" critics and insult this guy, you should praise him for showing all of us (at least the ones that didn't know that method) a curious way of multiplying.
Yes i know it is faster using a calculator, and yes, it is probably faster doing it the old fashioned way with pen and paper. But at least its a different way of multiplying.
Here are my 5 cents.
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why don't you just accept it as being a cool way of thinking about multiplication? Mental maths is one of the things i excel at, and i wouldn't use this, but it's a fun and interesting way, and i think it deserves a good rating. It's not about what the best way is, it's about the different approaches you can take to things
By stfunoob 1164385257 Reply Spam [+5] Moderate Up Moderate Down Remove- 0
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Crazy jedi mind tricks
By artful 1163643844 Reply Spam [+2] Moderate Up Moderate Down Remove- 0
that's the explanation i was given when i learned the trick.
By Akahad 1163375871 Reply Spam [+2] Moderate Up Moderate Down Remove- 0
Thats Extremely good.. but I only saw evens and odds together.. like Example: 23 x 26.. and something like 321 x 123.. I mean, does it work the same if its unpaired.. example: 145 x 13.. Do u understand what im saying...
By Da_Latin_Prince 1186613062 Reply Spam [+1] Moderate Up Moderate Down Remove- 0
I like this method, however I have come across one that I cant figure out how it works. 18 x 56 does not come out right, not sure why? Any ideas?
By bmorehokie 1170122374 Reply Spam [+1] Moderate Up Moderate Down Remove- 0
- addition
it works but you must be careful adding the differents parts: from left to right you ll have: 5 / 46 / 48. you must add 5 /4 6 4/ 8 which gives 5 / 5 0 /8 then 5 5/0/8 wich gives 1008
By Akahad 1197432689 Reply Spam [+0] Moderate Up Moderate Down Remove
the correct number3244708 - 1
i am so shocked you are really genuis and very intellegent i have just try for it in defferent numbers and the formula is working perfectly
By khyu 1168884033 Reply Spam [+1] Moderate Up Moderate Down Remove- 0
- 0
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lol yea do that XD ........o wait i have a calculator =)
By vids4$$$ 1207272268 Reply Spam [+0] Moderate Up Moderate Down Remove- 0
thanks for this i can use this in my maths exam :)
By dubs07 1198453114 Reply Spam [+0] Moderate Up Moderate Down Remove- 0
i didnt quite get understand it but im interested and im gonna look into it
By moseph654 1172127668 Reply Spam [+0] Moderate Up Moderate Down Remove- 0
It's great for the people who can't do, or it is hard for them to do mental math(this includes me). When you don't have a calculator this is just another way. Even though you would have to have great memory skills to be able to remember where to count your first intersections and such. But non-the-less it is still an interesting way to solve those annoying multiplication problems. :]
By deerweensquidxd 1171227905 Reply Spam [+0] Moderate Up Moderate Down Remove- 0
I like it
By maf 1169178947 Reply Spam [+0] Moderate Up Moderate Down Remove- 0
- BUT WHAT ABOUT IF THERES A ZERO AT THE E...
How does that work? Please explain!
By Exanthias 1169250719 Reply Spam [-1] Moderate Up Moderate Down Remove4088029 - 1
but wouldn´t be faster to do the multiplication as usual .
By BlowUrMind 1168409296 Reply Spam [+0] Moderate Up Moderate Down Remove- 0
when im bored in math class i'll do that instead of boring write out problems. just wtf is up with ur nine? it looks like a g.
By luckyduck 1167538125 Reply Spam [+0] Moderate Up Moderate Down Remove- 0
that its a girl not a boy
By CRITICAL KIDD 1166986296 Reply Spam [+0] Moderate Up Moderate Down Remove- 0
this guy earned more than $7,000 and u guys r callin him an idiot? maybe u need to reconsider who the idiot is
By conartist101 1165787830 Reply Spam [+0] Moderate Up Moderate Down Remove- 0
That's awesome - not very practical, but high nifty factor
By kc5ifk 1165538514 Reply Spam [+0] Moderate Up Moderate Down Remove- 0
it s amusing,ahah
By yayaniu 1165437944 Reply Spam [+0] Moderate Up Moderate Down Remove- 0
ab * cd = (10*a b) * (10*c d) =
= 10*a*10*c 10*a*d 10*b*c b*d =
=100*(a*c) 10*(a*d b*c) b*d
All crosses is multiplies. You only make 4 multiplications (number of dots).
Same parts in case of 123*321.
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i hope your "new one coming" don't be the rusian method 1(multiplication using division), the russian method 2(using fingers to multiply numbers from 6 to 10) or the arabig method for doing multiplication graphically
By peladan 1164493042 Reply Spam [+0] Moderate Up Moderate Down Remove- 0
she paint so well
By DongPhuongSoc 1164289130 Reply Spam [+0] Moderate Up Moderate Down Remove- 0
nice parlor trick to show to the friends
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but i tend to use calculator... or a mobile phone on gmat test...
By sic 1164014636 Reply Spam [+0] Moderate Up Moderate Down Remove- 0
drawing 1234587964515 X 21358753982587=?
By //.. 1163837219 Reply Spam [+0] Moderate Up Moderate Down Remove- 0
- omfg
like you get that number at school. or anywhere.
By Hacli06 1163956009 Reply Spam [+1] Moderate Up Moderate Down Remove
Always negative comments.
Only reason for that is that you are jealous that you didnt came with this video first.
Nice Trick akahad3119237 - 1
I rather use a calculator..
By Misled 1163783436 Reply Spam [+0] Moderate Up Moderate Down Remove- 0
do it 99999x9999 and see wat u draw
By lo83 1163771564 Reply Spam [+0] Moderate Up Moderate Down Remove- 0
Big props to you bro. Makes life a bit easier eh - so long as you've got paper and pen. Bugger if it's in your head.
I'm gonna have to try this one out next time.
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than buying an asian kid.......how?
By cptmanok 1163756574 Reply Spam [+0] Moderate Up Moderate Down Remove- 0
guys..any body can tell me from where i should start put the DOTs? tks a lot
By Waz up ya 1163728766 Reply Spam [+0] Moderate Up Moderate Down Remove- 0
It seems there should be sound with this, but I'm not getting any.,
By bobmark 1163722988 Reply Spam [+0] Moderate Up Moderate Down Remove- 0
- No sound
There's no sound. I'm not good at creating music and i don't want to use the copyrighted ones. Maths don't need heavy metal. :p
By Akahad 1165449826 Reply Spam [+0] Moderate Up Moderate Down Remove3244708 - 1
Long Multiplication is quicker, easier and doesn't cost a fortune in pencils.
By Dayt 66 1163717720 Reply Spam [+0] Moderate Up Moderate Down Remove- 0
especially when you have large numbers like 12345...
By lazyrom 1163704947 Reply Spam [+0] Moderate Up Moderate Down Remove- 0
it could help to make fun an arithmetic class for my son
By malo92 1163702964 Reply Spam [+0] Moderate Up Moderate Down Remove- 0
- zero
how you do with zero
By hhhhhhhhhhhhhhhh 1165048566 Reply Spam [+0] Moderate Up Moderate Down Remove3034905 - 1
how you do with zero like 302*32=...?
By hhhhhhhhhhhhhhhh 1165048270 Reply Spam [+0] Moderate Up Moderate Down Removethe usual way is easier and takes less time. Glad to see a different way though
By ZoglerMan 1163686079 Reply Spam [+0] Moderate Up Moderate Down Remove- 0
The crossing points are just multiplication, but through counting. It's way faster to multiply than to count, and you actually end up doing exactly the same thing, but perhaps in a slightly different order.
Just draw 1 line each time, but with a number attached to it, draw the little arcs, and then multiply the crossings. Same thing...
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u only can do it ,if it 1 in the end of whole number. for example 31, 321, 71. and watch my video( new formula of mathematic> search:mathematic)
By salihin 1163644723 Reply Spam [+0] Moderate Up Moderate Down Remove- 0
- 0
- It works!
The numbers you are left with are:
By letmein1 1163649847 Reply Spam [+0] Moderate Up Moderate Down Remove
6, 22, 20 right?
(6 2), (2 2), 0 = 840
Remember with 2-digit numbers, the upper digit is added with the number to its left.3291282 - 1
24 x 35 does word using this method
By albonator316 1163647315 Reply Spam [-1] Moderate Up Moderate Down Removeincase you forgot to bring your calculator
By jengkoil 1163630039 Reply Spam [+0] Moderate Up Moderate Down Remove- 0
321 x 123 =
I would multiply 321 x 100 = 32100
then multiply 321 x 20 = 6420
then 321 x 3 = 963
then add them all together 32100 + 6420 +321 = 39483
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- obviously not easier to round off
You should try his method because:
By albonator316 1163647003 Reply Spam [-1] Moderate Up Moderate Down Remove
32100 6420 321 doesn't equal 39483!!
use a calaculator!3262031 - 1
- you made a typo
the last term of your addition should be 963 and not 321 (as you calculated previously), that's why people are saying you're wrong. But one might question their intelligence when you consider that your procedure was correct, thus it should give a correct answer ...
By Bingk 1163946803 Reply Spam [+0] Moderate Up Moderate Down Remove1847649 - 2
Hey, the goal is not to use any calc...
At least, his mistake proves that he didn't use one to write this post... How many of you really did 123 x 321 mentaly ?
Interesting!! ...
By Mavreq 1163611110 Reply Spam [+0] Moderate Up Moderate Down Remove- 0
if only u can find that trick, before they found calculator...
ok, n now, where's my calculator...?
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the solution is interesting .But there will be a certain of points to count...?...haha
By yayaniu 1163412970 Reply Spam [+0] Moderate Up Moderate Down Remove- 0
- yes
that's why he drew those lines circling the dots to circle, watch closely, you'll know which dots to count.
By KilluaZaoldyeck 1163606227 Reply Spam [+0] Moderate Up Moderate Down Remove1894822 - 1
I guess Every Problem has a Solution in itself!!! :)
By sidshadow 1199353659 Reply Spam [-1] Moderate Up Moderate Down Remove- 0
Well that makes sense but how about the weird number 9, who can explain that? http://www.metacafe.com/watch/704894/the_best_math_trick_ever/
By andreipalatkas 1183565471 Reply Spam [-1] Moderate Up Moderate Down Remove- 0
very nice but missed out on something, http://www.metacafe.com/watch/609924/sweet_kick/
By good right 1180418851 Reply Spam [-1] Moderate Up Moderate Down Remove- 0
Nice Video...
If you are interested in posting your video at 15 of my website and drive more traffic to you for only $15 for a whole year. (that is onlya $1.25 a month)
Please Contact me at: info(at)choufouni (dot)com
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it works with 1,2and3 only :-D
By hafidovitche 1177000608 Reply Spam [-1] Moderate Up Moderate Down Remove- 0
que crack
By noestudies 1175622576 Reply Spam [-1] Moderate Up Moderate Down Remove- 0
Well done. There's another cool trick here. Check it out... http://www.metacafe.com/watch/476990/derivation_of_cube_roots_from_any_perfect_cube/
By shwalker 1174450900 Reply Spam [-1] Moderate Up Moderate Down Remove- 0
http://www.metacafe.com/watch/332976/great_math_trick_with_number_6/
By papitza 1173975602 Reply Spam [-1] Moderate Up Moderate Down Remove- 0
Thats cool technique, but it does get complicated for larger multiplication
there is good technique for squaring large numbers you can view it on..
http://www.metacafe.com/watch/454399/speed_calculations_squaring_large_numbers/
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Cool graphics. But impractical to use for larger digits
Check out this funny prank : http://www.metacafe.com/watch/452926/funny_prank_vanishing_desktop_icons/
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http://www.metacafe.com/watch/441990/cool_math_trick/
By shortdude1619 1172197222 Reply Spam [-1] Moderate Up Moderate Down Remove- 0
great man how do you know about this?
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That method is like methods of multiplication used in computer science, for instance ALU in CPUs.
Cool :)
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i tried with other numbers (ex:6789...)
and it worked
ex 585x3=1755
5x3=15
8x3=24
5x3=15
- 0
HOW DUMB CAN ANYONE BE?? frankly speaking... if you start to draw in ur maths exam, you will fail coz you dont have enough time to finish it. Why is multiply symbol is "x"? coz its is all crosses... know you know how calculus think of all these thing up hundred of years ago? in short, do more exercise, dont let your brain rusts, you will be more familiar with even 5 digit multiplication... do in ur tiny little brain. i hope there will be another video clip teach you how to add 1 1 = 2... So you go to college to learn - X / eh?
By nvidia888 1165105645 Reply Spam [-1] Moderate Up Moderate Down Remove- 0
_______
321
642
963
= 39483
aint that much easer than all dat
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use a calculator. ........ this isnt mental btw. in mental sums etc. u arent allowed to write anything except the answers so.... thats considered working =)
By !@#!@# 1164125400 Reply Spam [-1] Moderate Up Moderate Down Remove- 0
I prefer the common method of multiplication. Uses less paper and less time. Less margin of error, too...it could be simple to draw the arc in the wrong spot in this method shown.
By BeerInMyHand 1163991477 Reply Spam [-1] Moderate Up Moderate Down Remove- 0
I checked with larger numbers and it works. Yet didn't took the time to compare which one is faster, this method or regular multiplication as taught in school.
By lolalolita 1163974210 Reply Spam [-1] Moderate Up Moderate Down Remove- 0
this may have been useful for the chinese when they invented papyrus, but we invented the calculator to do this S**t for us, its a neat trick, but boring as F**k , so.... buy a calculator instead, u'll save money instead of having to buy paper and pens.
By pinman21 1163960618 Reply Spam [-1] Moderate Up Moderate Down Remove- 0
it relys very heavly on drawing a picture... hence not mental!
By xeno_tm 1163929200 Reply Spam [-1] Moderate Up Moderate Down Remove- 0
nothing interesting
By michaelonline 1163802804 Reply Spam [-1] Moderate Up Moderate Down Remove- 0
I'm usually not rating videos, but this time it would be stupid not to rate it as excellent!
The man who discovered this should be given a nobel price. Someone understanding how this trick is possible? Please explain if you can!
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why dont you try multiplication you learnt at school ...
By cdrk 1163777770 Reply Spam [-1] Moderate Up Moderate Down Remove- 0
use calculator is much more faster right...
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THANKS!!!!!!!
By teflon 1163770922 Reply Spam [-1] Moderate Up Moderate Down Remove- 0
- 1
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stupid..why dont use calculator
By lo83 1163770262 Reply Spam [-1] Moderate Up Moderate Down Remove- 0
ABSOLUTELY BRILLIANT. THIS IS THE KIND OF STUFF I APPRECIATE. GOOD WORK!!!!
By teflon 1163770200 Reply Spam [-1] Moderate Up Moderate Down Remove- 0
- you have got to be f*ckin jocking
...
By Ibiza82 1163873214 Reply Spam [-1] Moderate Up Moderate Down Remove1021194 - 1
- negatve numbers?
Hey this was like totally Bomb...I tried for an aptitude test and got all screwed up when I had eight out of ten questions with negative numbers:)
By JRef 1163990117 Reply Spam [+0] Moderate Up Moderate Down Remove3346331 - 2
that is F**king retarded. takes forever, i rather do the old fashioned way. not only does it actually prove u know how, rather than doing this bogus way, its also faster.
so 1) its faster, and 2) it shows u know how.
- 0
i was trying to do this in school today in math didnt realy work with like 29x24 bc its a uneven square if i did somthing wrong tell me
- 0
and less complicated
I don't mean to multply them by using calculator
- 0
Amazing indeed
By Maximum_LiMiT 1163675508 Reply Spam [-1] Moderate Up Moderate Down Remove- 0
AND THIS WHOLE TIME IVE BEEN USING A " CALCULATOR "
By PROLIFIC 1163664678 Reply Spam [-1] Moderate Up Moderate Down Remove- 0
if you try using higher numbers like 7, 8 and 9. For 1, 2 and 3 there aren't so many lines.
By Foddy 1163662494 Reply Spam [-1] Moderate Up Moderate Down Remove- 0
BUY A CALCULATOR! !!!!!!
By Human above all 1163626658 Reply Spam [-1] Moderate Up Moderate Down Remove- 0
I'd work that problem out by hand the normal way even faster than that
By 1163616874 Reply Spam [-1] Moderate Up Moderate Down Remove- 0
Check this out http://www.metacafe.com/watch/440644/hard_multiplication_made_easy/
By MURFIE 1172063651 Reply Spam [-2] Moderate Up Moderate Down Remove- 0
This one is even easier: http://www.metacafe.com/watch/328038/amazing_multiplication_trick/
By joach 1168116094 Reply Spam [-2] Moderate Up Moderate Down Remove- 0
I think we have calculators for a reason!!! :S
By LordPIG 1168013808 Reply Spam [-2] Moderate Up Moderate Down Remove- 0
well that wazz funny you know so that o.k.
well check it out yo!!!!!! :]
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Yo there is this crazy thing I don't know if you've heard of it. But there is a couple out on market. It's called....... hold on let me think.....Oh Yea! THE CALCULATOR!!!
By icedogs2931 1166845889 Reply Spam [-2] Moderate Up Moderate Down Remove- 0
That's why calculators were invented..so we don't have to draw on pieces of paper for days trying to figure out a stupid math question..
By KGurl 1166845762 Reply Spam [-2] Moderate Up Moderate Down Remove- 0
What the F**k , why does this damn video hav 7000 dollars worth of views. almost 1.5 mil people. i watched this and had to turn it off half way through, u can work it out faster any othe way. Regular methoud of just multiplication works fine for me. This guy doesnt deserve 7000 dollars for drawing lines. Its not like he invented this metod anyway.
By lowrider144 1165738284 Reply Spam [-2] Moderate Up Moderate Down Remove- 0
Imagine multiplying 989 * 8789 - lines and points everywhere.
Me I think it's probably easier on an hp12c, don't you?
- 0
impresive... but y dont u only use a calculator or do it normal ... its faster and easier
By Tevize 1164935505 Reply Spam [-2] Moderate Up Moderate Down Remove- 0
- 0
It's called a calculator people, since we're not in grade 5 any more your allowed to use it.
By Blutonium_Boy 1164799463 Reply Spam [-2] Moderate Up Moderate Down Remove- 0
ive got a good feeling im gonna earn good salary making sh**ty videos for 4G's...im gonna quit my waiter job..
By eatMYmilkshake 1164603489 Reply Spam [-2] Moderate Up Moderate Down Remove- 0
Unless you are in 1st grade and can't multiply, this is totally a waste of time, it takes 4 times longer than doing it the normal way. you won't look like an idiot drawing lots of lines together.
By Reikon 1164330354 Reply Spam [-2] Moderate Up Moderate Down Remove- 0
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