题目内容

8:30=24:x
2
3
5
6
=x:9
3:x=9:15
1.25:0.25=x:1.6
x
9
=
0.8
4.5
1
3
1
4
=
1
5
:x.
(1)8:30=24:x
8x=30×24,
x=90;

(2)
2
3
5
6
=x:9
5
6
x=
2
3
×9,
x=
36
5


(3)3:x=9:15
9x=3×15,
x=5;

(4)1.25:0.25=x:1.6
0.25x=1.25×1.6,
x=8;

(5)
x
9
=
0.8
4.5

4.5x=9×0.8,
x=1.6;

(6)
1
3
1
4
=
1
5
:x
1
3
x=
1
4
×
1
5

x=
3
20
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