【4又2/3*(-5/14)+(-0.4)/(-4/25)】*1又1/5

问题描述:

【4又2/3*(-5/14)+(-0.4)/(-4/25)】*1又1/5

【4又2/3*(-5/14)+(-0.4)/(-4/25)】*1又1/5
=【-5/3+5/2】*1又1/5
=5/6×6/5
=1