Trick 5

Multiply any number between 10- 19.

I know that your teacher,mom and other people would tell u to learn tables till 20.For this u must know tables till 10 and addition.

Let us take the example-

Example-18 x 17 =

Step 1- Add the larger digit with the rightmost digit of the other .(18 + 7 = 25)

Step 2 - Write a 0 after the number obtained in step 1. (25 - 250)

Step 3 -Then multiply last digits of both the numbers.(8 x 7 = 56 )

Step 4 - Then add the answer of Step 2 with Step 3.(250 + 56 = 306)

So i think u must have got that learning tricks an fasten your calculations.
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