The Trachtenberg Speed System of Basic Mathematics
hardcover
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February 4, 1982
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ISBN-13: 9780313232008
ISBN-10: 0313232008
About this book
The Trachtenberg Speed System of Basic Mathematics by Jakow Trachtenberg. hardcover edition. ISBN: 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.
