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.

3
5
5
8
 
=(
3
5
×40):(
5
8
×40)
=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