我家住在五层。

Wǒjiā zhù zài wǔ céng.

My home is on the fifth floor.

这商场一共有几层啊？

Zhè shāngchǎng yígòng yǒu jǐ céng a?

How many floors does this shopping mall have?

这里每层都有洗手间。

Zhèlǐ měi céng dōu yǒu xǐshǒujiān.

Every floor here has a bathroom.