bn:15846703n
Noun Named Entity
Categories: Games of mental skill, Abacus, Mental calculation, Number stubs
EN
mental abacus  abacus system  Flash Anzan
EN
The abacus system of mental calculation is a system where users mentally visualize an abacus to carry out arithmetical calculations. Wikipedia
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EN
The abacus system of mental calculation is a system where users mentally visualize an abacus to carry out arithmetical calculations. Wikipedia
A system involving visualization of an abacus to carry out arithmetical calculations Wikipedia Disambiguation
system where users mentally visualize an abacus to do calculations Wikidata
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