The Trachtenberg Speed System of Basic M

The Trachtenberg Speed System of Basic M
Pris
Pris
169,- 169,-
Pocket
Format Pocket
Utgivelsesår 1989
Forlag Profile Books Ltd
Språk Engelsk
ISBN 9780285629165
Sider 272

Om The Trachtenberg Speed System of Basic M

First developed during WW2, the Trachtenberg speed system makes possible high-speed arithmetical calcula tions with a remarkable degree of accuracy. The system has e ven been known to beat computer calculations - in some insta nces - in terms of speed '


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