is a simple rectangular structure containing beads used for calculation purpose, both simple and complex, including LCM, percentage, roots, etc. A basic abacus contains two sections or rows divided by a center bar. The number of columns is variable. Each column in the upper section has one or two beads and each column in the lower section has four beads. Let’s get familiar with its working.
Proper arrangement of the Abacus The beads in the upper section holds five times the value of
Assignment of Place Value The columns in the abacus are assigned a place value where the column beads in the lower section. Different values can be assigned to the beads in the bottom section. on the extreme right holds the ones place and its
Count the beads Push the bead upwards in order to count a digit. 1 can be shown by pushing a bead from the lower section of the extreme right to the upper section, 2 by shifting two beads, and hence forth.