Tag: Ann Cutler

The Trachtenberg Speed System Of Basic Mathematics translated and adapted by Ann Cutler and Rudolph McShane (book review).

August 29, 2013 | By | Reply More
The Trachtenberg Speed System Of Basic Mathematics translated and adapted by Ann Cutler and Rudolph McShane (book review).

Jakow Trachtenberg was born in Russia and a pacifist who married a German woman, stayed in Germany but with the on-set of war, they fled to Yugoslavia where he was later interned in a concentration camp. A author and engineer, he spent his days there manipulating numbers, understanding their relationships and developing a system of […]

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