Math Trick

I have been away from blog writing for a long time, as I was very busy with my college stuffs and other stuffs. Anyway now I think I can catch up with my blog writing. Well for the starting I would like to write about some math tricks, how you can multiply fast. I will be writing about multiplying of 11-19. I will go thorough each step so the reader could learn within few minutes and can calculate very fast.
Well let’s start with how to calculate with
a) 17*9
to calculate this easily what we have to do is, we have to multiply 7 (the last digit) with the 9, which will become 63.
To the second step you have to multiply 9 (the last digit) by 10, which will be 90.
After that, we have to join up those two which will become 153.

Dear friends, you can say that buddy, you are taking long time to calculate, but friends, if it’s 19*9 or something like that it might be bit hard to calculate.

b) 18*13
To calculate these two numbered one, the formula is you have to add up one number with the last number of another one ( i.e. either 13+8 , or 18+3) then multiply the sum by 10. It will become 210.
Second step is, we have to multiply last number of each (i.e. 8*3) which will become 24 and then add those both number to get answer, which will be 234.

You can use these formulas to calculate any number. I hope it will take only five minutes to master these two formulas and you can calculate those hard feeling numbers very easily such as 17*16 or 19*18, or 13*17, anything of your wish.

I hope this might be a good start for getting back with blogs.