Abacus Basic Level
The abacus, counting frame used for performing arithmetic calculations. Abacus widely used as a brain development program. It consists of a rectangular frame holding a number of vertically arranged rods, on which beads slide up and down. The columns of beads represent different place values. One column represents numbers in the hundreds, while another column represents numbers in the thousands. Abacus is the fastest way of calculation. We can achieve the level of mental arithmetic and can do a large number of calculations in mind within a second by doing a continuous practice.