napkin math
The act of performing quick mathematics often as a means of estimation, as if done on…The act of performing quick mathematics often as a means of estimation, as if done on the back of a napkin (or in one's head).
Значение
значений: 1(Канада, США, неисчисляемое)The act of performing quick mathematics often as a means of estimation, as if done on the back of a napkin (or in one's head).
Однокоренные
связанных слов: 1Связанныеback-of-the-envelope
Уроки к слову
уроков: 1- A1Исчисляемые и неисчисляемые существительные — Потому что оно может быть неисчисляемым