Trachtenberg system: Revision history

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23 November 2014

4 November 2013

  • curprev 00:2700:27, 4 November 2013‎ en>Sluffs‎ 17,088 bytes +17,088‎ →‎General multiplication: changed: "Ordinary people can learn this algorithm and thus multiply four digit numbers in their head..." - removed "Ordinary people" - more important to stress its an easy way of doing calculations in your head

21 July 2012

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