问题 解答题
解比例
0.5:0.8=x:14
x
75
=
1.2
25
x:10%=3:
2
5
2
9
:12=
5
6
:x
1.5:x=0.2:44x:0.5=
2
3
:4
答案

(1)0.5:0.8=x:14

0.8x=0.5×14

0.8x÷0.8=7÷0.8

x=8.75;

(2)

x
75
=
1.2
25

25x=75×1.2

25x÷25=90÷25

x=3.6;

(3)x:10%=3:

2
5

2
5
x=10%×3

2
5
x÷
2
5
=0.3÷
2
5

x=

3
4

(4)

2
9
:12=
5
6
:x

2
9
x=12×
5
6

2
9
x÷
2
9
=10÷
2
9

x=45;

(5)1.5:x=0.2:44

0.2x=1.5×44

0.2x÷0.2=66÷0.2

x=330;

(6)x:0.5=

2
3
:4

4x=0.5×

2
3

4x÷4=

1
3
÷4

x=

1
12

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