The Trachtenberg Speed System of Basic Mathematics
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Book Details
Author(s)
Jakow Trachtenberg
Publisher
Praeger
ISBN / ASIN
0313232008
ISBN-13
9780313232008
Category
Mathematics
Marketplace
France 🇫🇷
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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 calculation is as easy as reading a story. It looks like magic, but the rules are based on sound logic.
