化简下列各比并求比值：（要有过程) 8.1 : 9 3/4 : 0.25 9/10 : 3/35 5 : 3/4

8.1:9 3/4:0.25 9/10:3/35 5:3/4=(8.1*10):(9*10) =3/4:1/4 =(9/10*70):(3/35*70) =(5*20):(3/4*20)=81:90 =(3/4*4):(1/4*4) =63:6 =100:15=(81/3):(90/3) =3:1 =63/6 =20:3=27:30 =3 =20/3=27/30楼主,这些都是我一...