Jakow Trachtenberg - Who derived his own Speed Math in Nazi Concentration Camp - Trachtenberg System
The Trachtenberg system is a system of rapid mental calculation. The system consists of a number of readily memorized operations that allow one to perform arithmetic computations very quickly. It was developed by the Russian Jewish engineer Jakow Trachtenberg in order to keep his mind occupied while being in a Nazi concentration camp. #Trachtenberg #SpeedMaths
Jakow Trachtenberg - Who derived his own Speed Math in Nazi Concentration Camp - Trachtenberg System
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