Looking online for abacus classes? Join online abacus classes at Mastermindabacus.com. The Abacus is split into two parts by a straight bar perpendicular to the poles. Paradise beads are those that are above the crossbar, and also earth beads are those that are below the bar. For more information, visit our website.
https://www.mastermindabacus.com/
https://www.mastermindabacus.com/
