Math Is Fun Forum / Vedic Math

radha55 · 2009-10-11 06:31:12

Use the formula ALL FROM 9 AND THE LAST FROM 10 to perform instant subtractions.

* For example 1000 - 357 = 643

We simply take each figure in 357 from 9 and the last figure from 10.

So the answer is 1000 - 357 = 643

And thats all there is to it!

This always works for subtractions from numbers consisting of a 1 followed by noughts: 100; 1000; 10,000 etc.

* Similarly 10,000 - 1049 = 8951
* For 1000 - 83, in which we have more zeros than figures in the numbers being subtracted, we simply suppose 83 is 083.

So 1000 - 83 becomes 1000 - 083 = 917

http://vedicmaths.110mb.com

Last edited by radha55 (2009-10-11 06:31:57)

bobbym · 2009-10-11 06:35:56

Hi radha55;

This is the vedic technique that I like for multiplication.

http://www.youtube.com/watch?v=kZKOPKIHsrc

Last edited by bobbym (2009-10-11 06:42:49)

radha55 · 2009-10-11 21:32:05

Vedic Maths - Trick 2

Using VERTICALLY AND CROSSWISE you do not need to the multiplication tables beyond 5 X 5.

* Suppose you need 8 x 7

8 is 2 below 10 and 7 is 3 below 10.
Think of it like this:

The answer is 56.
The diagram below shows how you get it.

You subtract crosswise 8-3 or 7 - 2 to get 5,
the first figure of the answer.
And you multiply vertically: 2 x 3 to get 6,
the last figure of the answer.

That's all you do:

See how far the numbers are below 10, subtract one
number's deficiency from the other number, and
multiply the deficiencies together.
* 7 x 6 = 42

Here there is a carry: the 1 in the 12 goes over to make 3 into 4.

Here's how to use VERTICALLY AND CROSSWISE for multiplying numbers close to 100.

*
Suppose you want to multiply 88 by 98.

Not easy,you might think. But with
VERTICALLY AND CROSSWISE you can give
the answer immediately, using the same method
as above.

Both 88 and 98 are close to 100.
88 is 12 below 100 and 98 is 2 below 100.

You can imagine the sum set out like this:

As before the 86 comes from
subtracting crosswise: 88 - 2 = 86
(or 98 - 12 = 86: you can subtract
either way, you will always get
the same answer).
And the 24 in the answer is
just 12 x 2: you multiply vertically.
So 88 x 98 = 8624

http://vedicmaths.110mb.com/tutorial2.html