zhǎokāi cháng zhǐ bǎ dà miàn'é huàn kāi, zhǎolíng shì jiézhàng hòu tuìhuí duōyú de qián

“找开”常指把大面额换开，“找零”是结账后退回多余的钱。

"Zhaokai" usually refers to breaking a large bill, while "zhaoling" refers to receiving change after settling a bill.