Rapid mental calculation

From: Hans Aberg (haberg-1@telia.com)
Date: Sat Jun 05 2010 - 15:55:14 CDT

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FYI, in view of recent threads, there is a rapid mental calculation
system, for decimal numbers, though it might be done for other bases
as well:
http://en.wikipedia.org/wiki/Trachtenberg_system

Hans

Next message: Doug Ewell: "Re: Overloading Unicode"
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