Rader's NUMBERNUT.COM. Advanced Math. Maths Solutions - home page. Maths Quizzes - home page. Online Maths School. Motivating children to succeed. 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 held in a Nazi concentration camp. The rest of this article presents some methods devised by Trachtenberg. The most important algorithms are the ones for general multiplication, division and addition[citation needed]. HomeEdResources : Links. A to Z of Maths Is Fun. BetterExplained. The average is a simple term with several meanings.
The type of average to use depends on whether you’re adding, multiplying, grouping or dividing work among the items in your set. Quick quiz: You drove to work at 30 mph, and drove back at 60 mph.