题目内容

(1)x:9=8:3. (2)
2
3
5
6
=x:20
(3)
4
5
:2.4=x:0.06
(4)
6
7
2
3
=x:
7
15
(5)x:
3
20
=
1
4
3
8
(6)
x
4.5
=
4
27
(1)x:9=8:3,
           3x=9×8,
        3x÷3=72÷3,
            x=24;

(2)
2
3
5
6
=x:20

         
5
6
=
2
3
×
20,
     
5
6
x÷
5
6
=
40
3
÷
5
6

           x=16;

(3)
4
5
:2.4=x:0.06,
        2.4x=
4
5
×
0.06,
   2.4x÷2.4=0.048÷2.4,
           x=0.02;

(4)
6
7
2
3
=x:
7
15

      
2
3
x=
6
7
×
7
15

   
2
3
x÷
2
3
=
2
5
÷
2
3

         x=
3
5


(5)x:
3
20
=
1
4
3
8

       
3
8
x=
3
20
×
1
4

    
3
8
x÷
3
8
=
3
80
÷
3
8

          x=
1
10


(6)
x
4.5
=
4
27

      27x=4.5×4,
  27x÷27=18÷27,
        x=
2
3
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