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 held in a Nazi concentration camp. The rest of this article presents some of the methods devised by Trachtenberg. The most important algorithms are the ones for general multiplication, division and addition. Also, the Trachtenberg system includes some specialized methods for multiplying small numbers between 5 and 13.
The chapter on addition demonstrates an effective method of checking calculations that can also be applied to multiplication.
Famous quotes containing the word system:
“I need not say what match I would touch, what system endeavor to blow up; but as I love my life, I would side with the light, and let the dark earth roll from under me, calling my mother and my brother to follow.”
—Henry David Thoreau (18171862)