4/5×(-25/6)×(-9/10) =(-10/3)×(-9/10) =3 (24/13)×(16/7)×0×4/3=0 5/4×(-1.2)×(-1/9) =(-3/2)×(-1/9) =-1/6 (-3/7)×(-1/2)×(-8/15) =3/14×(-8/15) =-4/35
五分之四乘（负六分之二十五）乘（负十分之九）=?
4/5×(-25/6)×(-9/10) =(-10/3)×(-9/10) =3 (24/13)×(16/7)×0×4/3=0 5/4×(-1.2)×(-1/9) =(-3/2)×(-1/9) =-1/6 (-3/7)×(-1/2)×(-8/15) =3/14×(-8/15) =-4/35