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hamnox comments on Truly Part Of You - Less Wrong

59 Post author: Eliezer_Yudkowsky 21 November 2007 02:18AM

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Comment author: hamnox 23 January 2011 03:54:03AM 0 points [-]

I learned my nines like that too, except I think the teacher showed us that trick. Of the things I learned personally... My tricks were more about avoiding the numbers I didn't like than being efficient.

I could only ever remember how to add 8 to a number by adding ten and then subtracting two. I learned my 8 times tables by doubling the 4th multiple, and 7 by subtracting the base number from that. I suppose I only ever really memorized 2-6 and 12.