Sunday 22 September 2013

Multiply upto 20X20 in your head

The Main thing that helps to be better in maths is to understand how it works.

Can u Multiply upto 20X20 in your head

Ill show you how.........

See for yourself with an example:

Take 17 X 15
  • Place the larger of the two on the top in your mind 

                                   
  • Then draw a shape such that it covers 17 above and 5 from below            
Those numbers are all you need.
  • Add 17 + 5 = 22
  • Add zero behind it that is multiply it by 10  = 220
  • Multiply the covered lower 5 and the single digit above it which is 7
   7 X 5 = 35
  • Now add  220 + 35 = 225
ANY NUMBER UPTO 20 X 20 CAN BE MULTIPLIED MENTALLY BY THIS METHOD
TRY IT FOR YOURSELF TAKING DIFFERENT NUMBERS. IT WILL MAKE YOUR CALCULATIONS EASY.


No comments:

Post a Comment