先化简比,再求比值: 6.4:8= 1/6:2/3= 0.375:0.625= 8:8/9=

问题描述:

先化简比,再求比值:
6.4:8=

1
6
2
3
=
0.375:0.625=
8:
8
9
=

6.4:8=64:80=4:5,
6.4:8=4;5=0.8;

1
6
2
3
=1:4,
1
6
2
3
=1:4=0.25;
0.375:0.625=
3
8
5
8
=3:5,
0.375:0.625=3:5=0.6;
8:
8
9
=72:8=9:1.
8:
8
9
=9:1=9.
故答案为:4:5,0.8;1:4,0.25;3:5,0.6;9:1,9.