问题 解答题

化简比

5:3.5;    1:1.8;  3.75:1.

答案

5:3.5,

=(5×2):(3.5×2),

=10:7;

1:1.8,

=(1×5):(1.8×5),

=5:9;

3.75:1,

=(3.75×20):(1×20),

=75:20,

=(75÷5):(20÷5),

=15:4.

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