一五一十

yīwǔyīshí
lit. count by fives and tens (idiom); to narrate systematically and in full detail

CEDICT

  1. (of narrating) in full detail
  2. in full detail

Wiktionary

  1. 数数目时普通以五为单位，故以一五、一十指计数的动作。
  2. 比喻把事情从头至尾详细说出，无所遗漏。

重編國語辭典

把事情从头至尾详细说出，无所遗漏

維基詞典

Entry Composition

1 一 yī
  1. one
  2. single
  3. a (article)
  4. as soon as
  5. entire; whole; all; throughout
  6. "one" radical in Chinese characters (Kangxi radical 1)
  7. also pr. yāo for greater clarity when spelling out numbers digit by digit
2 五一 wǔyī 5-1 (May 1st)
3 十 shí
  1. ten
  2. 10