bn:03375671n
Noun Concept
Categories: All pages needing cleanup, Games of mental skill, Articles with short description, Mental calculation
EN
mental calculation  Arithmetic shortcut  Arithmetic shortcuts  Fast mathematics  Fast mental calculation
EN
Mental calculation consists of arithmetical calculations using only the human brain, with no help from any supplies or devices such as a calculator. Wikipedia
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EN
Mental calculation consists of arithmetical calculations using only the human brain, with no help from any supplies or devices such as a calculator. Wikipedia
Arithmetical calculations using only the human brain Wikidata
The solving of arithmetical problems without the help of pen and paper or calculators. OmegaWiki