The Trachtenberg Speed System of Basic Mathematics by Jakob Trachtenberg
The Trachtenberg Speed System of Basic Mathematics
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Jakob Trachtenberg
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The Trachtenberg Speed System of Basic Mathematics

Jakob Trachtenberg with R. McShane, A. Cutler

301 pages • first pub 2011 (editions)

nonfiction mathematics science informative medium-paced
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Description

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 calc...

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