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→Reading the abacus
File:Abacus-6.png|1 bottom bead is up and 1 top bead is down, corresponding to 6 units
File:Abacus-6.png|1 bottom bead is up and 1 top bead is down, corresponding to 6 units
File:Abacus-10.png|5 bottom beads are up and 1 top bead is down, corresponding to 10 units (time to "carry" to the left)
File:Abacus-10.png|5 bottom beads are up and 1 top bead is down, corresponding to 10 units (time to "carry" to the left)
File:Abacus-10x1.png|This 10 is equivalent to...
File:Abacus-1x10.png|... this 10
File:Abacus-54321.png|54321
File:Abacus-54321.png|54321
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