Home›Browse›mental calculation🌐EnglishEnglishBahasa IndonesiaDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaTürkçeРусскийالعربيةفارسیहिन्दी한국어中文日本語EntityQ620584· pop 33· linked from 161 articlesmental calculationSign in to saveAlso known as mental math, mental arithmeticarithmetical calculations using only the human brainAvailable in 30 languagesEspañolFrançaisDeutsch中文日本語РусскийItalianoالعربيةहिन्दीBahasa IndonesiaBasqueBetawiCatalanFinnishGreekHebrewHungarianKazakhShow 11 moreMalayNederlandsNorwegianSerbiansimpleSvenskaUkrainianWarayzh_yueفارسی한국어via Wikidata sitelinks · CC0