book-download The Trachtenberg Speed System Of Basic Mathematics Book

The Trachtenberg Speed System Of Basic Mathematics

Souvenir Press Ltd | 1989-06-29 | ISBN: 0313232008 | 272 pages | PDF | 3 MB
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.

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date Date: 28:Jul:2010
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isbn ISBN: 0313232008
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