Speed System of Basic Mathematics
Speed System of Basic Mathematics
By Jakow Trachtenberg, R. McShane, A. Cutler
Publisher: Souvenir Press Ltd | 1989 | 272 Pages | ISBN: 0285629166 | PDF | 8.80 MB
By Jakow Trachtenberg, R. McShane, A. Cutler
Publisher: Souvenir Press Ltd | 1989 | 272 Pages | ISBN: 0285629166 | PDF | 8.80 MB
| The complete system of the Trachtenberg method of mathematics which makes possible high-speed arithmetical calculations with a remarkable degree of accuracy. |
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