Assertion: abacus's bead | /r/HasProperty | moved to the middle
Facets:
Source sentences:
text: If one bead from the upper deck and three beads from the lower deck in the ones column have been moved to the middle, this equals 8, since the bead from the upper deck is worth 5.
text: For example, if three beads from the lower deck in the ones column have been moved toward the middle, the abacus shows the number 3.
text: If one bead from the upper deck and three beads from the lower deck in the ones column have been moved to the middle, this equals 8, since the bead from the upper deck is worth 5.
text: To add numbers on the abacus, beads are moved toward the middle.