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Trachtenberg Speed System

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Author:Math Forum, Ask Dr. Math FAQ
Description: An introduction to Trachtenberg's system of performing high-speed multiplication, division, addition, subtraction, and square root, all in one's head, with references.

Levels: Elementary, Middle School (6-8), High School (9-12)
Languages: English
Resource Types: Problems/Puzzles, Recreations
Math Topics: Basic Operations, Exponents/Roots

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