问题 解答题
14.4:x=18:5
0.5
0.4
=
x
0.6
9.6
x
=
9
0.6
35
0.7
=
x
21
0.8:x=
3
5
:0.75
49:(5+x)=14:2
5
6
3
4
=
x
0.4
x:1.6=12:
4
5
答案

(1)14.4:x=18:5,

             18x=14.4×5,

             18x=72,

               x=4;

(2)

0.5
0.4
=
x
0.6

      0.4x=0.5×0.6,

      0.4x=0.3,

         x=0.75;

(3)

9.6
x
=
9
0.6

        9x=9.6×0.6,

        9x=5.76,

         x=0.64;

 

(4)

35
0.7
=
x
21

      0.7x=35×21,

      0.7x=735,

         x=1050;

(5)0.8:x=

3
5
:0.75,

         0.6x=0.8×0.75,

         0.6x=0.6,

            x=1;

(6)49:(5+x)=14:2,

      14(5+x)=49×2,

      14(5+x)=98,

            5+x=7,

              x=2;

(7)x:1.6=12:

4
5
         0.8x=1.6×12,

         0.8x=19.2,

            x=24;

(8)

5
6
3
4
=
x
0.4
3
4
x=
5
6
×
2
5

         

3
4
x=
1
3

            x=

4
9

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