问题 解答题
化简下面各比.
18﹕240.12﹕0.4
5
8
5
9
答案

(1)18﹕24,

=(18÷6)﹕(24÷6),

=3:4;

(2)0.12﹕0.4,

=(0.12×50)﹕(0.4×50),

=6:20,

=3:10;

(3)

5
8
5
9

=(

5
8
×72)﹕(
5
9
×72),

=45:40,

=9:8.

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