Speed Math - Page 8

Haha :D

On December 13 2013 14:30 Daut wrote: this is stupid, someone get me away from this thread before i turn into neilly

need i remind you of my findings?

Ya'll ever do math on speed?

On December 13 2013 10:56 drone666 wrote: lol, I think 99% are lying here or changing the settings, wtf, I couldn't make more than 13 I will pay 20$ for a video of someone making over 50

How much for over 60?

If anyone wants the PDF of "The Secret of Mental Math" PM me.

Good book. I guarantee if you practice the techniques the book illustrates you'll atleast double your speed

Seems like I am spamming the thread, but whatever.

I just remember another one.


When you multiple any 2 digit by 11, you add the to digits together and place in the middle of those two digits. If the addition is greater than ten, you carry the 1 to the tens place and add.

Examples:
11*22=242

2+2=4(put digit in middle), now you get 242

11*33=363
3+3=6, put in middle
363

11*67=737

Now the easy way: 6+7=13
put 3 in middle, and add 1 to the digit farthest left. In this case it's 6.

so, 6+1, 37 = 737

11*87= 957
8+7=15

put 5 in middle, add the 1 to the 8, you get 957

Why not just mutiply by 10 and add the number one more time? Seems a lot simpler. 11*22 = 220+22. 11x73= 730+73.

On December 14 2013 08:48 Raidern wrote: Why not just mutiply by 10 and add the number one more time? Seems a lot simpler. 11*22 = 220+22. 11x73= 730+73.

I disagree. For example 58*11, 5+8 is a lot easier to add than 10*58+58

Less digits.

Maybe my explanation wasn't the best in the post, which could be the reason of why it may seem more difficult.

5+8=13, Add the 1 to the digit is the tens spot, you get 6,

so 638

new record



ran ridiculously well with getting easy questions

26 first try while wathing TV and also on a laptop in the dark