Cover art for Trachtenberg Speed System of Basic Mathematics

Trachtenberg Speed System of Basic Mathematics
New edition

By Jakow Trachtenberg

Published
Souvenir, June 1989
ISBN
9780285629165
Format
Softcover, 272 pages
Dimensions
12.9cm × 19.8cm
$27.99
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First developed during WW2, the Trachtenberg speed system makes possible high-speed arithmetical calcula tions with a remarkable degree of accuracy. The system has e ven been known to beat computer calculations - in some insta nces - in terms of speed '