[Bobalu]

Not only should these methods still be taught but another system also needs to be.

The Trachtenberg System of speed math!

From Wikipedia: 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.

http://en.wikipedia.org/wiki/Trachtenberg_system

[Thank You Rush]

“”The Trachtenberg System of speed math!””

I always hated math in school but the Trachtenberg System intrigued me and I loved working with it. I’ve tried over the years to remember the name of it - thanks!!