Abacus

Abacus is mechanical calculation device which requires manual operation for finding solutions to arithmetic problems. The abacus (plural abaci or abacuses), also called a counting frame, is a calculating tool that was in use in Europe, China and Russia, centuries before the adoption of the written Hindu–Arabic numeral system and is still used by merchants, traders and clerks in some parts of Eastern Europe, Russia, China and Africa.

Research has shown that people who are good at abacus and perform mental calculations, use the right hemisphere of the brain actively with the sense of sight and hearing. Our animated tutorial is developed keeping these points in mind and we believe that “abacus” is the best mental arithmetic program for kids.