noun
EXAMPLES FROM CORPUS
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All of them will make either a slide rule or an abacus as a way of presenting how number sets work.
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Make an abacus and write a report about its usefulness in terms of place value and computation.
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Once in a while, the numbers fall, the abacus clicks into a pattern.
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She gave him an abacus , explained the basic principles, and showed him how to make his trick work even better.
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Sometimes he calculates the price on an abacus and then indicates the total.
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The central volutes intertwine and a tendril and foliage breaks the line of the abacus between these and the angle volutes.
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Vassily Prokofyevich, the manager, was doing his accounts, snapping his abacus .
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Vocabulary is words, lists of, abacus beads, each encapsulating a precise idea.