One drops five to four (4+ 1), two drops five to three (3+2, 4+2), three drops five to two (2+3, 3+3, 4+3) and four drops five to one (1+4, 2+4, 3+4).
Six on one to five into one (5, 6, 7, 8+6), seven on two to five into one (5, 6, 7+7), eight on three to five into one (5, 6+8) and nine on four to five into one (5+9).
Commonly used terms
Neutral: when both the upper and lower gears of a certain gear are off the beam, it is called neutral. Neutral means this gear doesn't count, or it means 0.
Empty disk: All gears of the abacus are in neutral, that is to say, there is no counting at all. This is called empty disk.
Inner beads: The counting beads counted by the light beam are called inner beads.
Outer beads: Counting beads that are not counted from the light beam are called outer beads.
Pull up: refers to pulling up the lower bead against the beam.
Pull: refers to pulling the upper bead towards the beam.
Pull out: refers to pulling the upper bead or the lower bead away from the beam.