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 1.125:1/80
问题描述:
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 1.125:1/80
答
12/25÷2÷3/5=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=31/6
3/2:4/5=3/2×5/4=15/8=15:8
33/5:22=33/5×1/22=3/10=3:10
1.5:51/2=3/2×2/51=1/17=1:17
1.125:1/80=9/8×80=90=90:1
答
12/25÷2÷3/5
=12/25*1/2*1/3*5
=2/5
(1/4*8/15+4)/4/5
=(2/15+4)*1/4*1/5
=1/150+1/5
=(1+30)/150
=31/150
3/2:4/5
=3/2*5/4
=15/8
33/5:22
=33/(22*5)
=3/10
1.5:51/2
=1.5*2/51
=3/51=1/17
1.125:1/80
=9/8:1/80
=80*9/8
=90
答
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1/63/2:4/5 =3/2*5/4=15/833/5:22 =33/5*1/22=3/101.5:51/2 =3/2*2/51=1/171.125:1/80=1又1/8*80=9/8*...