The Trachtenberg Speed System of Basic Mathematics
The complete system of the Trachtenberg method of mathematics which makes possible high-speed arithmetical calculations with a remarkable degree of accuracy. This method is not only speedy but simple. It looks like magic, but the rules are based on sound logic.
Specificaties
| ISBN/EAN | 9780313232008 |
| Auteur | Ann Cutler |
| Uitgever | Van Ditmar Boekenimport B.V. |
| Taal | Engels |
| Uitvoering | Gebonden in harde band |
| Pagina's | 272 |
| Lengte | |
| Breedte |