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Abacus

usgb/ˈæbəkəs/Volume
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Calculation DevicePlay
An abacus is an ancient counting device, not a modern calculator. SlideBack in my grandmother's school, every student had an abacus.
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Physical InteractionPlay
Using an abacus involves manually moving beads; it's tactile. SlideI learned basic arithmetic by sliding beads on an abacus.
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Historical ImportancePlay
The abacus was essential before digital calculators; it's a piece of history. SlideThe museum's math exhibit features an ancient Roman abacus.