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Capa de Instant math, based on the Trachtenberg speed system of basic mathematics

a novel ·

Instant math, based on the Trachtenberg speed system of basic mathematics

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A system for doing multiplication and addition quickly through the use of mental "tricks."

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A system for doing multiplication and addition quickly through the use of mental "tricks."

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"A system for doing multiplication and addition quickly through the use of mental "tricks.""

— Margaret

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