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A system for doing multiplication and addition quickly through the use of mental "tricks."
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Addition, Multiplication, Mental arithmeticShowing 1 featured edition. View all 1 editions?
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1
Instant math, based on the Trachtenberg speed system of basic mathematics.
1962, Doubleday
in English
- [1st ed.]
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Feedback?September 28, 2020 | Edited by MARC Bot | import existing book |
February 14, 2020 | Edited by MARC Bot | remove fake subjects |
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December 10, 2009 | Created by WorkBot | add works page |