9.625除以2又3/2-4又8/3*8/3
=9又8/5*8/3-4又8/3*8/3
=(9又8/5-4又8/3)*8/3
=5又4/1*8/3
=4/21*8/3
=32/639.625除以2又3/2-4又8/5*8/3要算式我用的也不是方程啊