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# Mental math champ : Multiply Up to 20X20 In Your Head

Debraj Paul
19/03/2017 0 0

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. Just follow four simple steps.
I will assume that you know your multiplication table reasonably well up to 10x10.

Try this:

Take 14 x 18 for an example.

Add the first number to the last digit of the second number : 14 + 8 = 22

Multiply the result by 10: 22 x 10 =220

Multiply the last digits of both numbers together: 4 x 8 = 32

Add: 220 + 32 = 252

Another Example

Q. 11 x 14 = ?

Step 1: 11 + 4 = 15

Step 2: 15 x 10 = 150

Step 3: 1 x 4 = 4

Step 4: 150 + 4 = 154

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