Meaning & use
abacus
Last updated
A manual calculating tool made of a frame with rows of movable beads, used to perform arithmetic.
See it in a sentence
The shopkeeper quickly added up the total using an abacus.
Students in the class learned to do fast mental math after practicing with an abacus.
A note on using this word
Though invented thousands of years ago, the abacus is still taught in some countries as a tool for building mental arithmetic skills.
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