The Trachtenberg Speed System of Basic Mathematics
ebook (ePub)
Jakow Trachtenberg (Auteur), Ann Cutler (Traduction), Rudolph McShane (Traduction)
Do high-speed, complicated arithmetic in your head using the Trachtenberg Speed System.
Ever find yourself struggling to check a bill or a payslip? With The Trachtenberg Speed System you can. Described as the 'shorthand of mathematics', the...
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Format
ebook (ePub)
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Editeur
Souvenir Press
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Parution
01/03/2011