The Trachtenberg Speed System of Basic Mathematics by

The Trachtenberg Speed System of Basic Mathematics

with Rudolph McShane (Translator), Ann Cutler (Translator)

272 pages • missing pub info (view editions)

nonfiction mathematics science informative medium-paced
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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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