Learn Maths Easily- Solve at Great Speed !

Hi friends! Have you tried to multiply a 2 digit number with another one without using the conventional way of  one by one digit multiplication in which both the numbers are written one below the  other in two separate lines ? But  suppose you don't have a calculator ( :) ) and you want to  multiply the following :   25 x 28  or  15 x 43  or  90 x 75  and many more like these. The  conventional method will surely give the answer but it will take time. Today, let's see a method  which will give the solution  in less than 5 seconds! with practice .  EXAMPLE 1  Lets start by understanding multiplication of a simple example i.e. 21 X 41 .  Step 1  : Multiply ones place digits i.e. '1' with '1'. It becomes the first digit of the final answer like the following :-  Step 2  :  Cross - Multiply   tens digit with ones digit and ones digit with tens digit like the fol...