解比例.12﹕15=x﹕60 &nb...

2025-06-20 08:58:03
推荐回答(1个)
回答1:

(1)12﹕15=x﹕60
           15x=12×60
       15x÷15=720÷15
             x=48;

(2)0.8﹕2.4=12﹕x
         0.8x=2.4×12
    0.8x÷0.8=28.8÷0.8
            x=36;

(3)x﹕

1
4
=28:
1
6

      
1
6
x=
1
4
×28
   
1
6
1
6
=7÷
1
6

         x=42;

(4)1.5:16=x﹕3.2
         16x=1.5×3.2
     16x÷16=4.8÷16
           x=0.3;

(5)
4
5
2
5
1
2
﹕x
       
4
5
x=
2
5
×
1
2

    
4
5
4
5
=
1
5
÷
4
5

          x=
1
4


(6)
2
3
﹕x=
4
7
﹕6
      
4
7
x=
2
3
×6
    
4
7
x÷
4
7
=4÷
4
7

        x=7.