计算(1/3-1/4+2/5-5/6)x(-60)的值

问题描述:

计算(1/3-1/4+2/5-5/6)x(-60)的值
计算(-1/2)-(-1/6)+(-2/3)+(-4/5)的值

(1/3-1/4+2/5-5/6)x(-60)
=-20+15-24+50
=21