14.4:x=18:50.50.4=x0.69.6x=90.6350.7=x210.8:x=35:0.7549:(5+x)=14:256:34=x0.4x:1.6=12:45.-数学

题文

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
题型:解答题  难度:中档

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;
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