题目内容

解比例.
0.5:x=
2
3
:0.25
x
25
=
1.2
75
3
5
7
12
=
9
10
:x
15:x=0.2:44.
(1)0.5:x=
2
3
:0.25,
2
3
x=0.25×0.5,
2
3
x=1.25,
x=1.25÷
2
3

x=1.875,

x
25
=
1.2
75

75x=25×1.2,
x=
25×1.2
75

x=0.4,

3
5
7
12
=
9
10
:x,
3
5
x=
7
12
×
9
10

3
5
x=
21
40

x=
21
40
÷
3
5

x=
7
8


15:x=0.2:44,
0.2x=15×44,
x=
15×44
0.2

x=3300.
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