*To*: debian-devel@lists.debian.org*Subject*: Re: Stupid Arithmetic Tricks*From*: martin f krafft <madduck@madduck.net>*Date*: Thu, 28 Mar 2002 23:04:28 +0100*Message-id*: <[🔎] 20020328220428.GB23479@fishbowl.madduck.net>*Mail-followup-to*: debian-devel@lists.debian.org*In-reply-to*: <[🔎] 20020328173156.GP19063@deadbeast.net>*References*: <[🔎] 20020328020840.GA4665@x8b4e53d6.dhcp.okstate.edu> <[🔎] 20020328173156.GP19063@deadbeast.net>

also sprach Branden Robinson <branden@debian.org> [2002.03.28.1831 +0100]: > If I'm given a long column of one or two-digit numbers to add up (on > paper), I go down the ones column and strike out all complementary pairs > that add up to 10, e.g., 1 and 9, 2 and 8, 3 and 7, etc. For each pair > that I strike out, I make a tally mark or just keep track mentally. > Odds are you won't be left with very many digits to add up. So you do > that, carry the one if need be, and then add your tally marks to what > you're carrying. So if I struck off 4 complementary pairs that add up > to 10 and I was carrying a one, I'm now carrying a 5. You can then > repeat this process for the tens column. In theory this works for > arbitrarily long numbers, but with numbers > 99 paper space becomes a > concern. This technique is much, much faster than manually adding each > digit to the one below. At least in my experience... not meaning to push you off your cloud, branden, but that's how it's taught to first-graders over here in germany ;) -- martin; (greetings from the heart of the sun.) \____ echo mailto: !#^."<*>"|tr "<*> mailto:"; net@madduck no micro$oft components were used in the creation or posting of this email. therefore, it is 100% virus free and does not use html by default (yuck!).

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**Follow-Ups**:**Re: Stupid Arithmetic Tricks***From:*William Lee Irwin III <wli@holomorphy.com>

**Re: Stupid Arithmetic Tricks***From:*"Sean 'Shaleh' Perry" <shalehperry@attbi.com>

**Re: Stupid Arithmetic Tricks***From:*Branden Robinson <branden@debian.org>

**References**:**Re: ITP: mencal -- A menstruation calendar***From:*David Starner <starner@okstate.edu>

**Stupid Arithmetic Tricks***From:*Branden Robinson <branden@debian.org>

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