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The Trachtenberg Speed System of Basic Mathematics
The Trachtenberg Speed System of Basic Mathematics
Author: Ann Cutler
The revolutionary *new* method for high-speed multiplication, division, addition, subtraction, and square root. Multiply without using the multiplication tables.
ISBN: 274888
Publication Date: 1960
Pages: 270
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Publisher: Doubleday
Book Type: Hardcover
Members Wishing: 2
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