Abacus‐based mental calculation (AMC) was derived from the abacus which means doing calculation, including addition, subtraction, multiplication, and division, in mind with an imagined abacus. It is a high-level cognitive skill that runs through calcula

Abacus definition, a device for making arithmetic calculations, consisting of a frame set with rods on which balls or beads are moved. See more.

Abacus definition is - an instrument for performing calculations by sliding counters along rods or in grooves. Did You Know?