Abacus is an ancient mathematical instrument used for calculation. It is a brain development tool which helps in exercising the brain and there by improve, creativity, concentration, confidence and thus imparts techniques to do the fast calculations.
The basic principle behind the abacus is to represent numbers through the manipulation of beads. Beads on the lower part of each rod represent smaller place values, while those on the upper part represent larger values. By sliding beads back and forth along the rods, users can perform addition, subtraction, multiplication, and division.