解方程或解比例 0.36×5+ 3 4 x= 2 4 5 1 2 : 1

解方程或解比例 0.36×5+ 3 4 x= 2 4 5 1 2 : 1 5 = 1 8 :x.
2025-03-03 18:41:59
推荐回答(1个)
回答1:

(1)0.36×5+
3
4
x= 2
4
5

             1.8+
3
4
x=2
4
5

         1.8+
3
4
x-1.8=2
4
5
-1.8,
                
3
4
x=1,
            
3
4
3
4
=1÷
3
4

                  x=
4
3

(2)
1
2
1
5
=
1
8
:x,
       
1
2
x=
1
5
×
1
8

       
1
2
x=
1
40

   
1
2
1
2
=
1
40
÷
1
2

          x=
1
20