计算丨丨丨丨1-2丨-3丨-4丨-5丨的值

问题描述:

计算丨丨丨丨1-2丨-3丨-4丨-5丨的值

丨丨丨丨1-2丨-3丨-4丨-5丨
=丨丨丨1-3丨-4丨-5丨
=丨丨2-4丨-5丨
=丨2-5丨
=3.