2又2/3*(1又7/8-5/6)除[3又1/4/(1/8+1又5/6)]
问题描述:
2又2/3*(1又7/8-5/6)除[3又1/4/(1/8+1又5/6)]
有符号打错:2又2/3*(1又7/8-5/6)除[3又1/4除(1/8+1又5/6)]
答
2又2/3*(1又7/8-5/6)除[3又1/4/(1/8+1又5/6)]= 8/3*(1又7/8-5/6)*(1/8+1又5/6)/3又1/4= 8/3*(15/8-5/6)*(1/8+11/6)*4/7=(8/3*15/8-8/3*5/6)*(1/8*4/7+11/6*4/7)=(5-20/9)*(1/14+22/21)=25/9*47/...