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Sunday, July 11, 2010

Multiply 11 to 19 In Your Head

In this vedic trick you would learn to quickly multiply numbers between 11 and 19 in your head. With this trick, you will be able to multiply any two numbers from 11 to 19 in your head quickly, without the use of a calculator.

It is assumed that you know your multiplication table reasonably well up to 10x10.
Example 1: Multiply 14 by 17
  1. Always place the larger number of the two on top in your mind.
  2. Add right portion of lower number. 17 + 4 = 21


    Multiply up to 20 x 20 in your head
  3. Add a zero behind it (multiply by 10) to get 210.
  4. Multiply right portions of both numbers (4x7 = 28)


    Multiply up to 20 x 20 in your head
  5. Add 210 + 28 = 238.


    Multiply up to 20 x 20 in your head
Hence, 14 x 17 = 238
Example 2: Multiply 15 by 18
  1. Place the larger number of the two on top in your mind.
  2. First add 18 + 5 = 23
  3. Add a zero behind it (multiply by 10) to get 230.
  4. Multiply the covered lower 5 x the single digit above it the "8" (5x8 = 40)
  5. Add 230 + 40 = 270.
Hence, 15 x 18 = 270
That is It! Wasn't that easy? Practice it on paper first!
Note: This Method works only numbers between 11 and 19.

8 comments:

  1. ahaa...well said. well explained and gr8 way to do the multiplication in our head...

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  2. These tricks has improved my maths speed. Thanks for sharing

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  3. Vedic maths really rocks. Thanks for posting and keep posting........

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  4. Hi this is Poonam raane preparing for my next bank po exam can you be continue with these tricks?
    I Need Some more tricks to increase my math speed.

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  5. I solve 11 x 19 by applying positive of base 10 numbers
    11 is +1
    19 is +9

    1 x 9 = 9 right
    11+ 9 = 20 left

    20 left and 9 on the right is 209

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  6. Very nice trick your share for us..thanks sharing

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  7. Hiez..M Tanveer khan...I jst love vedic maths..thnx for sch useful information..:-)

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