De qué está hecho ábaco
A counting board with movable pebbles or beads.
- Wooden frame — tiene como parte. A frame with rods.
- Abacus beads — tiene como parte. Movable beads — the places of a number.
- Abacus rods — tiene como parte. Guides for the beads.
- Madera — está hecho de. The counting board was made of wood.
- Piedra — está hecho de. Counting was done with pebbles — the Latin calculus.