back-of-the-envelope in Portuguese
back-of-the-envelope in Portuguese
em cima do joelho
(idiomatic, informal) Especially of a calculation, estimation, or other reasoning, or an idea: approximate, rough, simplified. [from 20th c.]
à pressa
(idiomatic, informal) Especially of a calculation, estimation, or other reasoning, or an idea: approximate, rough, simplified. [from 20th c.]