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Old 08-05-2007   #1
The Last Leonidas
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Default Speed Math. What recommendations for methods (ex: trachenburg) of quick...

..."in your head" calculations? My work requires quick calculations 2,3,4 digit multiplication, addition, subtraction, and division.Ive looked at trachenburg and it doesnt seem to suit my purposes well. "Speed Math" it a book Im reading that uses reference numbers, and its not bad, but I wonder what else is out there?
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