问题 解答题
求比值并化简比.
①1.25:4.5②32:56
5
6
7
8
答案

1.25:4.5,

=1.25÷4.5,

=

5
18

1.25:4.5,

=(1.25×100):(4.5×100),

=125:450,

=(125÷25):(450÷25),

=5:18;

32:56,

=32÷56,

=

4
7

32:56,

=(32÷8):(56÷8),

=4:7;

5
6
7
8

=

5
6
÷
7
8

=

20
21

5
6
7
8

=(

5
6
×24):(
7
8
×24),

=20:21.

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