(-1/3)*(0.75)+2.5*(-1又1/5)等于多少?
问题描述:
(-1/3)*(0.75)+2.5*(-1又1/5)等于多少?
答
原式=(-1/3)*(3/4)+(5/2)*(-6/5)
= -1/4-3
= -13/3