Fast multiplication
learn how to multiply 2-digit numbers without using a calcultor. it works!!
Duration : 0:5:1
[youtube w6e2V49B2jw]
Tags: calculation, easycal, fast, maths, multiplication
learn how to multiply 2-digit numbers without using a calcultor. it works!!
Duration : 0:5:1
[youtube w6e2V49B2jw]
Tags: calculation, easycal, fast, maths, multiplication
June 28th, 2009 at 5:01 am
you are so smart
you are so smart
June 28th, 2009 at 5:01 am
omg!!! Thank you!
omg!!! Thank you!
June 28th, 2009 at 5:01 am
thats easy, (100(56 …
thats easy, (100(56) - 2(56))
5600 - 2*56
5600 - 112
5488
June 28th, 2009 at 5:01 am
cause 98 and 56 is …
cause 98 and 56 is closer to 100.. its in the other video.. the numbers that he showed are only closer to 10..
June 28th, 2009 at 5:01 am
omg ty so much for …
omg ty so much for this method genius 5/5
June 28th, 2009 at 5:01 am
yh yh…it works …
yh yh…it works whit low numbers like 13 x 13 but try do like 98 x 56 than that ign thing not work so….i say bad work !
June 28th, 2009 at 5:01 am
I already know all …
I already know all these skills but thanks for helping us out anyway. I personally think that it’s easier when you’ve learnt all your times tables and do the calculations normally because what he did slowed down my calculation. XD lol
June 28th, 2009 at 5:01 am
what if it is like …
what if it is like 135×125
June 28th, 2009 at 5:01 am
the math behin the …
the math behin the trick:
12 can be written as 10+2, 14 as 10+4
Or more generally for any number close to 10… 10+a or 10+b
now the multiplication becomes (10+a)*(10+b)
which can be rewritten as 10(10+a+b) + a*b
So this is why it works.
June 28th, 2009 at 5:01 am
Thank you for …
Thank you for posting this awesome video!!!! I can multiply Double digit numbers simply now!!!!!
June 28th, 2009 at 5:01 am
awsome thxx
awsome thxx
June 28th, 2009 at 5:01 am
It works with …
It works with numbers in the twenties to. U just have to multiply it by 2 after u add the number so 23X22: 23+2=25X2=50, those are your 2 first digits, for the the last one u do 2X3=6 so your answer is 506 XD It’S that simple
June 28th, 2009 at 5:01 am
Navz007, tell the …
Navz007, tell the people it ONLY WORKS with numbers in there teens on either side. Someone try 21 x 22 his way and see what you get.
it’s still cool other wise.
June 28th, 2009 at 5:01 am
what if it is like …
what if it is like 13×56?
June 28th, 2009 at 5:01 am
Wow how’d you find …
Wow how’d you find this method out? My fastest way is way more complicated!
June 28th, 2009 at 5:01 am
you are a life …
you are a life savor thanks
June 28th, 2009 at 5:01 am
omg thx
omg thx
June 28th, 2009 at 5:01 am
thx!!!!!!!!!!!! …
thx!!!!!!!!!!!! awesome lol
June 28th, 2009 at 5:01 am
u in awesome …
u in awesome man
really!!!!!!!!!!!!
June 28th, 2009 at 5:01 am
dude your so genius …
dude your so genius, thanks for sharing us your blessings
June 28th, 2009 at 5:01 am
NICE!!!
NICE!!!
June 28th, 2009 at 5:01 am
great video, my son …
great video, my son will learn how to multiply using this method!!! thanks!!!
June 28th, 2009 at 5:01 am
really cool, works …
really cool, works and tanks, this is very simple compared to the normal method.
Thx ^.^ Thx
June 28th, 2009 at 5:01 am
your my saviour …
your my saviour thanks navz you rule
June 28th, 2009 at 5:01 am
Damn thats cool!!
thats cool!!