问题 解答题

0.25:0.4.

答案

(1)0.25:0.4,

=(0.25×100):(0.4×100),

=25:40,

=(25÷5):(40÷5),

=5:8;

(2)0.25:0.4,

=0.25÷0.4,

=

5
8

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