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The Trachtenberg Speed System of Basic Mathematics
The Trachtenberg Speed System of Basic Mathematics
Author: Jakow Trachtenberg
The Trachtenberg Speed System of Basic Mathematics is a revolutionary system for calculating and teaching basic math. Children, who had repeatedly failed in arithmetic until their parents sent them to learn this method, were able to perform amazing calculations within seconds. In one demonstration, a ten year old child, when asked to multiply 51...  more »
ISBN-13: 9784871877091
ISBN-10: 4871877094
Publication Date: 8/8/2011
Pages: 272
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Publisher: Ishi Press
Book Type: Paperback
Other Versions: Hardcover
Members Wishing: 2
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