计算:[2-(1又2/3-4/5)*2]*(-6又1/3)
问题描述:
计算:[2-(1又2/3-4/5)*2]*(-6又1/3)
答
[2-(5/3 -4/5)×2]×(-19/3)
=[2-(10/3- 8/5)]×(-19/3)
=[(30/15)-(50/15)+(24/15)]×(-19/3)
=(4/15)×(-19/3)
=-76/45