数かぞえ違ちがえる

ichidan verb

miscount; count wrongly

Used when someone makes a mistake in counting, such as tallying items, pages, or numbers.

• ページを数かぞえ違ちがえて、足たりないことに気きづいた。

  I miscounted the pages and realized there weren't enough.

• お釣つりを数かぞえ違ちがえないように気きをつけて