问题 解答题
化简比.
0.4:
2
5

3
8
3
4

50千克:1吨.
答案

(1)0.4:

2
5

=(0.4×

5
2
):(
2
5
×
5
2
),

=1:1;

(2)

3
8
3
4

=(

3
8
×
8
3
):(
3
4
×
8
3
),

=1:2;

(3)50千克:1吨,

=50千克:(1×1000千克),

=50:1000,

=(50÷50):(1000÷50),

=1:20.

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