mental math
English
Noun
mental math (usually uncountable, plural mental maths)
- (Canada, US, Philippines) Synonym of mental calculation (“arithmetical calculations using only the human brain, with no help from any supplies (such as pencil and paper) or devices such as a calculator”).
Translations
arithmetical calculations using only the human brain, with no help from any supplies (such as pencil and paper) or devices such as a calculator — see mental calculation