The Trachtenberg Speed System of Basic Mathematics (Hardcover) (ISBN-13: 9780313232008)

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.

Author: Ann Cutler
ISBN-10: 0313232008
ISBN-13: 9780313232008
Publisher: Praeger
Language: English
Published: 02/04/1982
Pages: 272
Format: Hardcover
Weight: 0.93lbs
Size: 8.59h x 5.79w x 0.94d