化简下面各比并求比值3/5:5/8 1.25:0.25 3.6:0.16.
问题描述:
化简下面各比并求比值
:3 5
5 8
1.25:0.25
3.6:0.16.
答
:3 5
5 8
=(
×40):(3 5
×40)5 8
=24:25;
:3 5
5 8
=
÷3 5
5 8
=
;24 25
1.25:0.25
=(1.25×100):(0.25×100)
=125:25
=(125÷25):(25÷25)
=5:1;
1.25:0.25
=1.25÷0.25
=5;
3.6:0.16
=(3.6×100):(0.16×100)
=360:16
=(360÷8):(16÷8)
=45:2;
3.6:0.16
=3.6÷0.16
=
.45 2