abacus [noun]
Definition of abacus:
a calculator that performs arithmetic functions by manually sliding counters on rods or in grooves
Sentence/Example of abacus:
The children in the museum were fascinated by the ancient abacus.
Although calculators are common today, the abacus is still used in some parts of the world.
She used an abacus with remarkable speed and accuracy.
The merchant relied on his abacus to keep track of his daily sales.
Before the invention of calculators, the abacus was the primary tool for complex calculations.
Learning to use an abacus can improve mental math skills.
The teacher demonstrated how to use the abacus to add and subtract large numbers.
The clicking sound of the abacus beads filled the room as the shopkeeper made his calculations.
The exhibit showcased the evolution of calculating tools, from the abacus to the modern calculator.
Despite its simplicity, the abacus can be used for complex mathematical operations.