The abacus is considered the oldest calculating device used by humans but in the 1940s, a Korean man invented an abacus-like counting method using fingers called jisanbeop or chisanbop, a term that ...

When I was a kid learning arithmetic the only visual aid I remember is flash cards. These were useful for memorizing single-digit addition and multiplication, but is memorization really the best ...

Discover the abacus, a historic tool still vital in math, accounting, and education. Learn its usage, relevance today, and ...

Adults tend to want their children to outgrow using their fingers to solve number problems. “The finger technique is considered to be a less intelligent way of counting and calculating,” Aditya ...

Abacus is an ancient calculating tool that can be used for various mathematical calculations like addition, subtraction, multiplication, division or even for basic counting. The design of this tool ...

FORT LEE — For 10 seconds, a series of 50 random three-digit numbers flashed on the screen. After another second, abacus master Jeonghee Lee announced she'd finished the mental addition, correctly ...