三下五除二

sānxiàwǔchú'èr ㄙㄢ ㄒㄧㄚˋ ㄨˇ ㄔㄨˊ ㄦˋ

    • three, set five remove two (abacus rule)
    • efficiently
    • quickly and easily

Character by character

Saying俗语俗語

Idiom惯用语 · In everyday use

Literally
three down, five divide by two
Meaning
From an abacus rhyme; describes doing something quickly, neatly and without fuss. Approving.

Sources