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Yes: I was taught it in school aged 11 or 12. *NM* Tim Send a noteboard - 29/02/2012 11:33:22 PM
Vigilantibus non dormientibus jura subveniunt.

—Nous disons en allemand : le guerre, le mort, le lune, alors que 'soleil' et 'amour' sont du sexe féminin : la soleil, la amour. La vie est neutre.

—La vie ? Neutre ? C'est très joli, et surtout très logique.
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Does anybody know this math trick? - 29/02/2012 07:29:58 PM 832 Views
Sure, it's an artifact of base 10 - 29/02/2012 08:24:18 PM 630 Views
Your own fault for doing lots of math. - 29/02/2012 08:37:39 PM 675 Views
More my fault for having a algebra textbook that obsessed with abnormal base calculations - 29/02/2012 09:19:15 PM 679 Views
I think I had one like that one year. - 02/03/2012 04:16:26 AM 823 Views
Your method for 11 might be even quicker! - 29/02/2012 08:46:44 PM 508 Views
I think it's basically the same method, but if not enjoy - 29/02/2012 09:16:21 PM 480 Views
That's what I've always used. - 29/02/2012 09:24:05 PM 505 Views
Squares and factoring are also your friend. - 02/03/2012 03:56:08 AM 634 Views
Yes: I was taught it in school aged 11 or 12. *NM* - 29/02/2012 11:33:22 PM 205 Views
That is wayyyyy more complicated than 10x+x. But if it works for you, I am happy. *NM* - 01/03/2012 07:16:40 AM 226 Views
Not really - 01/03/2012 04:24:20 PM 463 Views
That's, uh... the same thing. - 01/03/2012 08:38:03 PM 446 Views
Again, it's the doing it in your head thing - 01/03/2012 10:27:01 PM 577 Views
Yes. It's called multiplication. *NM* - 02/03/2012 12:40:20 AM 269 Views
Har har har. Why even comment? *NM* - 02/03/2012 05:15:05 AM 207 Views

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