Activities/Abacus: Difference between revisions
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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-54321.png|54321 | |||
</gallery> | </gallery> | ||