expression, noun
how one plays one's cards; card-playing strategy
Literal meaning: the way one plays cards, including strategy and decision-making in card games.
ポーカーでは、カードの切り方が勝敗を決める。
In poker, how you play your cards determines whether you win or lose.
expression, noun
how one plays one's hand; how one uses one's resources
Idiomatic extension: the way one uses available resources, options, or advantages in a situation, like playing a hand in a card game.
交渉では、カードの切り方が重要だ。
In negotiations, how you play your hand is crucial.