The Trachtenberg Speed System of Basic Mathematics - Trachtenberg, Jakow, and Cutler, Ann (Translated by), and Sloan, Sam (Introduction by)
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Ever find yourself struggling to check a bill or tax on a payslip? The Trachtenberg Speed System provides a course in refining basic mathematics skills to tackle large sums before simplifying to increase concentration and ability in day-to-day arithmetic. The Trachtenberg system has been described as the 'shorthand of mathematics' and only requires the ability to count from one to eleven. Using a series of simplified keys, it allows anyone to master numbers and calculations giving greater speed, ease in handling numbers ...

The Trachtenberg Speed System of Basic Mathematics 2011, Ishi Press

ISBN-13: 9784871877091

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The Trachtenberg Speed System of Basic Mathematics 1989, Souvenir Press Ltd

ISBN-13: 9780285629165

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The Trachtenberg Speed System of Basic Mathematics 1989, Souvenir Press Ltd

ISBN-13: 9780285626782

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