Hello, friends today I am going to teach you or show you the magical tricks of multiplication in a simple way. Must read and watch my youtube video.


MAGICAL TRICKS OF MULTIPLICATION PART 3 - Aptitude Classes 4u


General Rule for Multiplication

Having dealt in fairly sufficient detail with the app special cases of multiplication, we now proceed with Formula" applicable to all cases of multiplication. It is sometimes not very convenient to keep all the above cases and their steps in mind, so all of us should be very much familiar with the "General Formula" of multiplication.

Multiplication by a two-digit number 

Ex. 1 Solve (1) 12x13 = ? (2) 17x18 = ? (3) 87x92 = ? 

Soln : (1) 12 x 13 = ? 

Step I. Multiply the right-hand digits of multiplicand and multiplier (unit-digit of multiplicand with unit-digit of the multiplier).


Step II. Now, do cross-multiplication, ie, multiply 3 by 1 and 1 by 2. Add the two products and write them down to the left of 6.


Step III. In the last step, we multiply the left-hand figures of multiplicand and multiplier.

1    2

↕️

1    3

1 5 6 (1 x 1)

(2) 17 x 18 = ?

Step I.


Step II.

Step III.


(3) 87 x 92 = ? 


So. these are the steps you have to follow to get the answer quickly and fast. If have any doubts just comment below I will reply to you. Must Watch my youtube video.

Youtube Video of Magical Tricks of Multiplication Part 3

Thank You ☺