早教吧 育儿知识 作业答案 考试题库 百科 知识分享

解比例58:x=5:160163:25=167:x1.8x=25x:8=0.125:0.2518:23=16:x44.88=x60.75:12=12:X.

题目详情
解比例
5
8
:x=5:160

16
3
2
5
=
16
7
:x
1.8
x
=
2
5
x:8=0.125:0.25
1
8
2
3
=
1
6
:x
 
44.8
8
=
x
6
0.75:
1
2
=12:X.
▼优质解答
答案和解析
(1)
5
8
:x=5:160
           5x=160×
5
8

        5x÷5=100÷5
           x=20;

(2)
16
3
2
5
=
16
7
:x
      
16
3
x=
2
5
×
16
7

  
16
3
16
3
=
2
5
×
16
7
÷
16
3

          x=
3
35


(3)
1.8
x
=
2
5

       2x=5×1.8
    2x÷2=5×1.8÷2
        x=4.5;

(4)x:8=0.125:0.25
     0.25x=8×0.125
0.25x÷0.25=1÷0.25
          x=4;

(5)
1
8
2
3
=
1
6
:x
      
1
8
x=
2
3
×
1
6

   
1
8
1
8
=
1
9
÷
1
8

         x=
8
9


(6)
44.8
8
=
x
6

        8x=44.8×6
     8x÷8=44.8×6÷8
         x=33.6;

(7)0.75:
1
2
=12:X
       0.75X=12×
1
2

 0.75X÷0.75=5÷0.75
           X=
100
3