abacuses
An abacus is a simple counting tool used for performing arithmetic calculations. It consists of a rectangular frame with rods or wires, each holding beads that can be moved back and forth. The position of the beads represents different values, allowing users to add, subtract, multiply, and divide numbers.
Originating in ancient times, the abacus has been used in various cultures, including the Chinese and Roman civilizations. While modern calculators and computers have largely replaced it, the abacus remains a valuable educational tool for teaching basic math concepts and improving mental calculation skills.