Comments on: Quick Multiplication up to 20 x 20

By: Vilas Thakur

Vilas Thakur — Wed, 13 Jun 2012 15:04:34 +0000

13 *18 = 1*( 13 + 8 ) l ( 3 * 8 ) = 1*21 l 24 =21 l 24 = 234
23 *28 = 2*( 23 + 8 ) l ( 3 * 8 ) = 2 *31 l 24 = 62 l 24 = 644
33 *38 = 3*( 33 + 8 ) l ( 3 * 8 ) = 3 *41 l 24 = 123 l 24 = 1254
43 *38 = 4*( 43 +8 ) l ( 3 * 8 ) = 4 *51 l 24 = 204 l 24 = 2064
53 *58 = 5*( 53 + 8 ) l ( 3* 8 ) = 5 * 61 l 24 = 305 l 24 = 3074

By: nidhi

nidhi — Thu, 12 Apr 2012 14:08:02 +0000

hey,is it any specific books available 4 this???????????????????????
plz tell,i need it…………………………………

By: rani

rani — Wed, 08 Feb 2012 09:14:03 +0000

its very nice n useful

By: RAJEEV MAHADANI

RAJEEV MAHADANI — Thu, 01 Dec 2011 13:04:53 +0000

Dear, is there any another short cut then Matrix?

By: Niranjan Bhandi

Niranjan Bhandi — Wed, 02 Nov 2011 15:16:46 +0000

Hi Nandeesh

can you tell me the above formula can be used in any two digit multiplication

and for three digit multiply what is the formula for ex: 839478*625

waht are short cut tricks for square, cube root, Division

By: varsha upadhyay

varsha upadhyay — Sun, 02 Oct 2011 06:05:50 +0000

THANKS!!! FOR THE GREAT TRICKS!

By: khalid

khalid — Sat, 01 Oct 2011 10:26:13 +0000

another trick which suits to all two digit multiplication is
Eg-25*24
(5*4) multiplying one’s(here we remains with carry 2 ie 5*4=20)….0
now multiplying criss cross (5*2)+(4*2)+carry ie 2 is 20…..0
now multiply ten’s (2*2)+carry ie 2 is….. 6
the ans is 600

By: Anupam Das

Anupam Das — Tue, 13 Sep 2011 14:42:32 +0000

76*45= simple use the guys method of criss-cross as explained in hindi.

or u can use 76*(50-5)=its very easy to multiply by 5 ain’t it

=(76*100)/2- no need to calculate it now= 3800-380=3420…ans

By: Anupam Das

Anupam Das — Tue, 13 Sep 2011 14:39:40 +0000

another approach:
hy can u tell me D shortcut trick of multiplying 45*487

45*487=(50-5)*487=(487*50)-(487*5)= (487*100/2) – (no need to calculate it now)
= 24350-2435=21915…just trying it, in this way nos can be calculated mentally ofcourse with practice

By: Sai

Sai — Fri, 12 Aug 2011 10:54:26 +0000

great job yaar…