问题 解答题
化简下列各比.
1
2
3
4
=
102
68
=
5
12
:15=
1:0.25=
答案

1
2
3
4

=(

1
2
×4):(
3
4
×4),

=2:3;

102
68
=102:68,

=(102÷26):(68÷26),

=7:3;

5
12
:15,

=(

5
12
×
12
5
):(15×
12
5
),

=1:36;

1:0.25,

=(1×4):(0.25×4),

=4:1.

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