(-1又2/3)÷3/4*(-0.6)*1又3/4÷1.4*(-2/5)=-5/3x4/3x3/5x7/4x5/7x2/5=-(5/3x3/5)x(7/4x5/7)x(4/3x2/5)=-1x5/4x8/15=-2/3
把小数和带分数都化成分数,除法变成乘法=—5/3x4/3x3/5x7/4x5/7x2/5然后进行约分就可以了=—2/3