Hey readers I am not trying to make you math genius but just teaching you some techniques which might be helpful to you in your life somewhere. Won’t it look cool if you can do some mathematical calculation without calculator when you need them at instant and when you don’t have calculator with you? It would be like a great help to you and you could be bit of smart in front of your pals around you.
Today I will write about how to make a calculation with 11. When you calculate any number with 11, you have to work with this formula
11* XY = X (x+y) Y
Well this is the formula to calculate by 11. Let’s get through some examples
11*22 would be 2 (2+2) 2 which is 242
11*39 would be 3 (3+9) 9 which would be 429.
It’s easy and cool enough and you don’t need calculator anymore for multiplying anything by 11.
Showing posts with label Math Tricks. Show all posts
Showing posts with label Math Tricks. Show all posts
Tuesday, February 3, 2009
Friday, January 30, 2009
Math Tricks, multiply by 20's
I have posted how to calculate from 11-19 by 11-19 within few minutes, but now I would like to share how to calculate 20-29 by 20-29. It’s also simple like calculating like before but there is slight change in the formula. In the previous one you have to multiply the last digit by 10, which as over here you have to multiply the last digit by 20. Anyway let’s get through the process so that you would easily learn it.
Let’s calcue 27*29.
In this process, what you have to do is add 27+ last digit of the another number (9), it would become 36, then multiply that number by 20, which will become 720.
As a second step multiply two last digits of your number (i.e. 7 and 9) from your digit, it will become 63. Now add up your two sums (63+720), it would become 783. That is your answer for your multiplication. Isn’t it easy to calculate in your mind within few seconds. Try some of the multiplication by yourself and show your capacity to your friends, they will be happy with your ability.
Let’s calcue 27*29.
In this process, what you have to do is add 27+ last digit of the another number (9), it would become 36, then multiply that number by 20, which will become 720.
As a second step multiply two last digits of your number (i.e. 7 and 9) from your digit, it will become 63. Now add up your two sums (63+720), it would become 783. That is your answer for your multiplication. Isn’t it easy to calculate in your mind within few seconds. Try some of the multiplication by yourself and show your capacity to your friends, they will be happy with your ability.
Wednesday, January 28, 2009
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.
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.
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