1740110
9780313232008
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.Cutler, Ann is the author of 'Trachtenberg Speed System of Basic Mathematics System of Basic Math' with ISBN 9780313232008 and ISBN 0313232008.
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