How many upper beads and how many lower beads should be used to represent the "8" on the abacus?
One upper grade bead represents 5
The next bead represents 1
8: In the same gear, it is indicated by one upper bead and three lower beads
One upper grade bead represents 5
The next bead represents 1
8: In the same gear, it is indicated by one upper bead and three lower beads