- Is there any site about multiplying two numbers mentally? Is there any

way to multiply two numbers without having to remember a lot of

numbers [except carry's and answers maybe]?

I am new to this, and I don't know where to find information on any of

this. So maybe a more appropriate question would be: Where should I

start if I want to multiply large numbers together?

Thanks! - 14/m/usa wrote:
> Is there any site about multiplying two numbers mentally? Is there any

"Trachtenberg's speed system of basic mathematics" might be a good place

> way to multiply two numbers without having to remember a lot of

> numbers [except carry's and answers maybe]?

>

> I am new to this, and I don't know where to find information on any of

> this. So maybe a more appropriate question would be: Where should I

> start if I want to multiply large numbers together?

>

> Thanks!

to start.

http://www.amazon.com/exec/obidos/ASIN/0285629166/rekordklubsaxoni

Regards,

Vikas - Hi;

To be able to calculate quickly and easily any 2 digit number, extend your multiplications table to 25 x 25; (although up to 12 x 12 could be sufficient too but makes principle more difficult in practice)

25 X 25 require only 325 facts

actually 170 new facts ( 55 facts with the 10 x 10 table )

from the 170 it's still possible to remove other facts.

Emmanuël

14/m/usa <mrcubist@...> a écrit :

Is there any site about multiplying two numbers mentally? Is there any

way to multiply two numbers without having to remember a lot of

numbers [except carry's and answers maybe]?

I am new to this, and I don't know where to find information on any of

this. So maybe a more appropriate question would be: Where should I

start if I want to multiply large numbers together?

Thanks!

Yahoo! Groups Links

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[Non-text portions of this message have been removed] - I have looked into the Trachtenberg system a little bit. But are

Trachtenberg's multiplication procedures designed for the mind? i.e.

can an average/above average, or so, person use Trachtenberg's system

mentally?

Thanks again

Robert

----

----> "Trachtenberg's speed system of basic mathematics" might be a good

place

> to start.

>

> http://www.amazon.com/exec/obidos/ASIN/0285629166/rekordklubsaxoni

>

> Regards,

> Vikas - Do you want to look at 2 numbers and, while looking at

them, say from right to left the answer?

Also, recently, there was described a very achievable

way of mentally calculating a 3 digit by 3 digit

number (cross multiplication):

http://www.geocities.com/mentalmathandcatlover/multiplication.html

I understand that Trachtenberg is a great way to

obtain an answer from right to left.

Another pursuit is to use mnemonics to memorise the

question itself and to mentally produce the answer and

then to announce it from left to right - but this is

much slower and less entertaining for an audience, I

would imagine.

Mike

--- Robert <mrcubist@...> wrote:

> I have looked into the Trachtenberg system a little

http://www.amazon.com/exec/obidos/ASIN/0285629166/rekordklubsaxoni

> bit. But are

> Trachtenberg's multiplication procedures designed

> for the mind? i.e.

> can an average/above average, or so, person use

> Trachtenberg's system

> mentally?

>

> Thanks again

> Robert

>

>

> ----

> ----

> > "Trachtenberg's speed system of basic mathematics"

> might be a good

> place

> > to start.

> >

> >

>

> >

___________________________________________________________

> > Regards,

> > Vikas

>

>

>

>

>

>

>

>

> Yahoo! Groups Links

>

>

> MentalCalculation-unsubscribe@yahoogroups.com

>

>

>

>

>

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