Web definition of abacus more. Recognized globally as a 'holistic brain development system,' the abacus is more. An abacus has beads that slide on rods. It can be used to count, add, subtract, multiply and more.
An abacus has beads that slide on rods. It can be used to count, add, subtract, multiply and more. An abacus has beads that slide on rods. Recognized globally as a 'holistic brain development system,' the abacus is more. Web definition of abacus more.
