The Trachtenberg Speed System of Basic Mathematics
$17.83
$20.98
ISBN 0285629166
Book info: The Trachtenberg Speed System of Basic Mathematics (Paperback, 272 pages) – Souvenir, 1989. Language: English. 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. Once one has mastered...
Book info: The Trachtenberg Speed System of Basic Mathematics (Paperback, 272 pages) – Souvenir, 1989. Language: English.
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. Once one has mastered the rules, lightning calculation is as easy as reading a story. It looks like magic, but the rules are based on sound logic.
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