(Q10419540)

English

mental abacus

system where users mentally visualize an abacus to do calculations

abacus system

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mental calculation

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Chinese Wikipedia

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Microsoft Academic ID

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subject named as

珠心算

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Wikipedia(3 entries)

enwiki Mental abacus
ruwiki Система мысленных вычислений на абаке
zhwiki 珠心算

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