Question

12/25÷2÷3/5 （1/4*8/15+4）/4/5 化简（有过程）3/2:4/5 33/5:22 1.5:51/2

Answer 1

12/25÷2÷3/5 = 12/25 *1/2 *5/3 =6/25*5/3=2/5

（1/4*8/15+4）/(4/5) = (2/15+4)*5/4=2/15*5/4+4*5/4=1/6+5=5又1/6

3/2:4/5 =3/2*5/4=15/8

33/5:22 =33/5*1/22=3/10

1.5:51/2 =3/2*2/51=1/17

1.125:1/80=1又1/8*80=9/8*80=90