Decimal arithmetic, was Re: Python GUI app to impress the boss?
Piet van Oostrum
piet at cs.uu.nl
Fri Oct 4 21:57:34 CEST 2002
>>>>> Christian Tismer <tismer at tismer.com> (CT) writes:
CT> Greg Ewing wrote:
>> Christian Tismer wrote:
>>> And see how simple they built their positional
>>> system, using just two symbols:
>> Although I suspect that scribes would quickly
>> have learned to recognise each "cluster" of
>> marks, drawn in a recognisable pattern,
>> as a single symbol, in which case there
>> were really 14 symbols (5 + 9).
CT> Right. Remarkably they did *lack a zero* !!!
They used an empty space for the zero. But I saw in a museum a tablet
where the scribe made a calculation error because he failed to notice this
Piet van Oostrum <piet at cs.uu.nl>
URL: http://www.cs.uu.nl/~piet [PGP]
Private email: P.van.Oostrum at hccnet.nl
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