问题 解答题
化简比
0.3:
9
7
1
7
5
14
1.5:1.
答案

(1)0.3:

9
7

=

3
10
9
7

=(

3
10
×70):(
9
7
×70),

=21:90,

=7:30;

(2)

1
7
5
14

=(

1
7
×14):(
5
14
×14
),

=2:5;

(3)1.5:1,

=(1.5×2):(1×2),

=3:2.

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