Re: soroban (Japanese abacus)
From llizard <lli...@NOPOLLUTIONwildmail.com>
· alt.ascii-art
· 17 Nov 2002 14:19 · View full thread
· report
In article <e31...@adfpc.amp.uni-hannover.de>, Andreas Freise <ad...@mpq.mpg.de> wrote: >On 16 Nov 2002 llizard wrote: >> I am just relearning how to add and subtract on one of these fantastic >> devices: [snip of soroban] >So, how _does_ it work then? Lesson 2 (from llizard's bbackwards sschool of soroban) Example with subtracting 128 from 237 traditional method: 1. starting in the ones column: 7-8=9 (take one from the tens column...) -| _ _ __ ) _) / /_ _) / _ _ ___ | ) (_) | /_ (_) ___________ _ (_) / 2. going to the tens column: 3-1-2=0 -| _ _ __ ) _) / /_ _) / _ _ ___ | ) (_) | /_ (_) ___________ _ _ | |(_) |_| / 3. going to the hundreds column: 2-1=1 -| _ _ __ ) _) / /_ _) / _ _ ___ | ) (_) | /_ (_) ___________ _ _ | | |(_) | |_| / Example with subtracting 128 from 237 1. Put 237 onto the soroban, then starting with the hundreds column: 2-1=1 1a _____________________________________ |o o o o o o o o o o o o o o o | || ||_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_o| || | | | | | | | | | | | | | o o o| |o o o o o o o o o o o o o o o o o| |o o o o o o o o o o o o o o | o || |o o o o o o o o o o o o o o o | o| ejm_|o_o_o_o_o_o_o_o_o_o_o_o_o_o_o_o_o|_ 1b _____________________________________ |o o o o o o o o o o o o o o o | || ||_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_o| || | | | | | | | | | | | | | o o o| |o o o o o o o o o o o o o o | o o| |o o o o o o o o o o o o o o o o || |o o o o o o o o o o o o o o o | o| ejm_|o_o_o_o_o_o_o_o_o_o_o_o_o_o_o_o_o|_ 2. Moving to the tens column: 3-2=1 _____________________________________ |o o o o o o o o o o o o o o o | || ||_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_o| || | | | | | | | | | | | | | o o o| |o o o o o o o o o o o o o o | | o| |o o o o o o o o o o o o o o o o || |o o o o o o o o o o o o o o o o o| ejm_|o_o_o_o_o_o_o_o_o_o_o_o_o_o_o_o_o|_ 3. Moving to the ones column: 7-8 oh oh, can't do that, so subtract 10 and add 2 3a _____________________________________ |o o o o o o o o o o o o o o o | || ||_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_o| || | | | | | | | | | | | | | o | o| |o o o o o o o o o o o o o o | o o| |o o o o o o o o o o o o o o o o || |o o o o o o o o o o o o o o o o o| ejm_|o_o_o_o_o_o_o_o_o_o_o_o_o_o_o_o_o|_ 3b _____________________________________ |o o o o o o o o o o o o o o o | || ||_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_o| || | | | | | | | | | | | | | o | o| |o o o o o o o o o o o o o o | o o| |o o o o o o o o o o o o o o o o o| |o o o o o o o o o o o o o o o o o| ejm_|o_o_o_o_o_o_o_o_o_o_o_o_o_o_o_o_||_ -- now that that is clear, shall I move onto finger arithmetic? >%^7^^^7^^ llizard aka ejm llizard@idirec+.ca ASCII-art & ASCII-animation www.crosswinds.net/~llizard/ascii-art/ If you are e-mailing and hit the reply button, add an "e" to "idirct"
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f996b,d4f7dda36d683f42 X-Google-Attributes: gidf996b,public X-Google-ArrivalTime: 2002-11-17 07:32:31 PST Path: archiver1.google.com!news1.google.com!sn-xit-02!sn-xit-06!sn-post-01!supernews.com!corp.supernews.com!not-for-mail From: llizard <lli...@NOPOLLUTIONwildmail.com> Newsgroups: alt.ascii-art Subject: Re: soroban (Japanese abacus) Date: Sun, 17 Nov 2002 09:19:46 -0500 Organization: via Internetdirect, Canada; zone 6A (or is it 5b?) Message-ID: <pr7...@4ax.com> Reply-To: lli...@idirct.ca References: <chh...@4ax.com> <e31...@adfpc.amp.uni-hannover.de> X-Newsreader: Forte Agent 1.8/32.548 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Complaints-To: abu...@supernews.com Lines: 125 Xref: archiver1.google.com alt.ascii-art:20710
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