The Trachtenberg Speed System of Basic Mathematics
Jakow Trachtenberg, translated by Ann Cutler and Rudolph McShane
| ISBN: | 9780285629165 |
| Publisher: | Profile Books |
| Published: | 1 June, 1989 |
| Format: | Paperback |
| Language: | English |
| Links | |
| Editions: |
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The Trachtenberg Speed System of Basic Mathematics
Jakow Trachtenberg, translated by Ann Cutler and Rudolph McShane
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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