hello friends
Vedic maths has got many short cuts and tips for mental arithimatic
It is very easy to understand and if practice it serioulsy for 15- 20 days it can become second nature to us…
Give it a try
Do you recommend any good websites about it?
Here is a book that covers all the basic procedures of vedic maths starting from the beginning.
You will see that many mental math ‘tricks’ are based on vedic math.
The author lets you download it for free. Here’s the link:
I recommend that everyone learn ‘shudha’(sp?) multiplication and division. I went to a private school and learned these methods - methods of cross multiplication versus adding trailing zero’s or however the other methods work… I honestly don’t know. It makes it extremely simple to do mental calculations on 1x1 - 4x4 calculations. For instance, 385 x 129 is a simple calculation that would probably take me 10 seconds to calculate and I haven’t even practiced.
Do you mean Vedic Sutras?
The book in post #2 shows cross multiplication up to 3x3’s but the principle is the same for bigger numbers.
It seems like that is what it is called…very similar to this method:
http://www.vedic-math.com/PDF/VM_Col_Feb_03_DS_2.pdf
except I did not learn to subtract by 9 or 10.
Sounds cool. Why don’t you time yourself doing that problem and then you can speak with data instead of guessing? Remember Data talks and ■■■■■■■■ walks. 
That’s a special case. In the pdf link he is using the distance from the closest base. That’s why he is subtracting.
Bill Handley uses this a lot in his book Speed Mathematics.
Straight cross multiplication would also work but when you’re multiplying numbers close to the same base it’s easier.
With regular 2x2 cross multiplication you have 4 multiplication steps and 3 addition steps to get the answer.
With this “close to the base” method you have 2 subtraction steps, 1 addition step and 1 multiplication step to get the answer.
This is how you do it.
92 x 89 = ?
First you put the distance from the base, in this case 100, to the left of the multiplicand and multiplier.
92 is 8 less than 100 so -8.
89 is 11 less than 100 so -11.
92 -8
89 -11
Add or subtract, in this case subtract, from the number diagonally across. Either top-to-bottom or bottom-to-top you will get the same answer.
92 - 11 = 81
or
89 - 8 = 81
Drop that number, 81, in the first position on the left.
Then multiply the two differences from the base.
-8 x -11 = 88
Drop that number, 88, down behind the first number on the right.
92 -8
89 -11
81 / 88 —> 8188
The answer is 8,188.
Thanks for this Bill W. I’m programming some of these into my daily mental workout to practice them.
You’re welcome Dale.
Some good book and website on vedic math
-
Teachers Manual elementary level
(refer vedicmaths.org)- Explain vedic math with large number of lucid and simple example.
-
Modern approach to speed math
(Amazon.com)- This book unifies Trachtenberg system , Speed math and Modern math. It explain vedic math in simple
language and extend Vedic math framework in area like divisibility , n’th root , power computation , Equation solving
in one line.
- This book unifies Trachtenberg system , Speed math and Modern math. It explain vedic math in simple
-
http://burningmath.com
Explore yourself