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Cutler A., McShane R. The Trachtenberg speed system of basic mathematics

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Cutler A., McShane R. The Trachtenberg speed system of basic mathematics
Garden City, New York: Doubleday & Company. Inc., 1960. — 270 p.
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.
Foreword
Tables Or No Tables?
Rapid Multiplication By The Direct Method
Speed Multiplication - "Two-finger" Method
Addition And The Right Answer
Division - Speed And Accuracy
Squares And Square Roots
Algebraic Description Of The Method
Postscript
Русский перевод: twirpx /file/2164987/, /file/53962/
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