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解方程或比例:18X-1=0.2X:514=21:58x:0.4=310:125.

题目详情
解方程或比例:
1
8
X-1=0.2
X:
5
14
=21:
5
8

x:0.4=
3
10
12
5
解方程或比例:
1
8
X-1=0.2
X:
5
14
=21:
5
8

x:0.4=
3
10
12
5
解方程或比例:
1
8
X-1=0.2
X:
5
14
=21:
5
8

x:0.4=
3
10
12
5
解方程或比例:
1
8
X-1=0.2
X:
5
14
=21:
5
8

x:0.4=
3
10
12
5
解方程或比例:
1
8
X-1=0.2
X:
5
14
=21:
5
8

x:0.4=
3
10
12
5

1
8
X-1=0.2
X:
5
14
=21:
5
8

x:0.4=
3
10
12
5
1
8
1 8 1 1 8 8
5
14
=21:
5
8

x:0.4=
3
10
12
5
5
14
5 14 5 5 14 14
5
8

x:0.4=
3
10
12
5
5
8
5 8 5 5 8 8
x:0.4=
3
10
12
5
3
10
3 10 3 3 10 10
12
5
12 5 12 12 5 5
▼优质解答
答案和解析
(1)
1
8
X-1=0.2,
1
8
X-1+1=0.2+1,
1
8
X=1.2,
1
8
1
8
=1.2÷
1
8

X=9.6,

(2)X:
5
14
=21:
5
8

5
8
X=
5
14
×21,
5
8
5
8
=
5
14
×21÷
5
8

X=
5
14
×21×
8
5

X=12;

(3) x:0.4=
3
10
12
5

12
5
x=0.4×
3
10

12
5
12
5
=0.4×
3
10
÷
12
5

x=0.4×
3
10
×
5
12

x=
1
20
(1)
1
8
X-1=0.2,
1
8
X-1+1=0.2+1,
1
8
X=1.2,
1
8
1
8
=1.2÷
1
8

X=9.6,

(2)X:
5
14
=21:
5
8

5
8
X=
5
14
×21,
5
8
5
8
=
5
14
×21÷
5
8

X=
5
14
×21×
8
5

X=12;

(3) x:0.4=
3
10
12
5

12
5
x=0.4×
3
10

12
5
12
5
=0.4×
3
10
÷
12
5

x=0.4×
3
10
×
5
12

x=
1
20
(1)
1
8
X-1=0.2,
1
8
X-1+1=0.2+1,
1
8
X=1.2,
1
8
1
8
=1.2÷
1
8

X=9.6,

(2)X:
5
14
=21:
5
8

5
8
X=
5
14
×21,
5
8
5
8
=
5
14
×21÷
5
8

X=
5
14
×21×
8
5

X=12;

(3) x:0.4=
3
10
12
5

12
5
x=0.4×
3
10

12
5
12
5
=0.4×
3
10
÷
12
5

x=0.4×
3
10
×
5
12

x=
1
20
(1)
1
8
X-1=0.2,
1
8
X-1+1=0.2+1,
1
8
X=1.2,
1
8
1
8
=1.2÷
1
8

X=9.6,

(2)X:
5
14
=21:
5
8

5
8
X=
5
14
×21,
5
8
5
8
=
5
14
×21÷
5
8

X=
5
14
×21×
8
5

X=12;

(3) x:0.4=
3
10
12
5

12
5
x=0.4×
3
10

12
5
12
5
=0.4×
3
10
÷
12
5

x=0.4×
3
10
×
5
12

x=
1
20
(1)
1
8
X-1=0.2,
1
8
X-1+1=0.2+1,
1
8
X=1.2,
1
8
1
8
=1.2÷
1
8

X=9.6,

(2)X:
5
14
=21:
5
8

5
8
X=
5
14
×21,
5
8
5
8
=
5
14
×21÷
5
8

X=
5
14
×21×
8
5

X=12;

(3) x:0.4=
3
10
12
5

12
5
x=0.4×
3
10

12
5
12
5
=0.4×
3
10
÷
12
5

x=0.4×
3
10
×
5
12

x=
1
20
1
8
1 8 1 1 1 8 8 8 X-1=0.2,
1
8
X-1+1=0.2+1,
1
8
X=1.2,
1
8
1
8
=1.2÷
1
8

X=9.6,

(2)X:
5
14
=21:
5
8

5
8
X=
5
14
×21,
5
8
5
8
=
5
14
×21÷
5
8

X=
5
14
×21×
8
5

X=12;

(3) x:0.4=
3
10
12
5

12
5
x=0.4×
3
10

12
5
12
5
=0.4×
3
10
÷
12
5

x=0.4×
3
10
×
5
12

x=
1
20
1
8
1 8 1 1 1 8 8 8 X-1+1=0.2+1,
1
8
X=1.2,
1
8
1
8
=1.2÷
1
8

X=9.6,

(2)X:
5
14
=21:
5
8

5
8
X=
5
14
×21,
5
8
5
8
=
5
14
×21÷
5
8

X=
5
14
×21×
8
5

X=12;

(3) x:0.4=
3
10
12
5

12
5
x=0.4×
3
10

12
5
12
5
=0.4×
3
10
÷
12
5

x=0.4×
3
10
×
5
12

x=
1
20
1
8
1 8 1 1 1 8 8 8 X=1.2,
1
8
1
8
=1.2÷
1
8

X=9.6,

(2)X:
5
14
=21:
5
8

5
8
X=
5
14
×21,
5
8
5
8
=
5
14
×21÷
5
8

X=
5
14
×21×
8
5

X=12;

(3) x:0.4=
3
10
12
5

12
5
x=0.4×
3
10

12
5
12
5
=0.4×
3
10
÷
12
5

x=0.4×
3
10
×
5
12

x=
1
20
1
8
1 8 1 1 1 8 8 8 X÷
1
8
=1.2÷
1
8

X=9.6,

(2)X:
5
14
=21:
5
8

5
8
X=
5
14
×21,
5
8
5
8
=
5
14
×21÷
5
8

X=
5
14
×21×
8
5

X=12;

(3) x:0.4=
3
10
12
5

12
5
x=0.4×
3
10

12
5
12
5
=0.4×
3
10
÷
12
5

x=0.4×
3
10
×
5
12

x=
1
20
1
8
1 8 1 1 1 8 8 8 =1.2÷
1
8

X=9.6,

(2)X:
5
14
=21:
5
8

5
8
X=
5
14
×21,
5
8
5
8
=
5
14
×21÷
5
8

X=
5
14
×21×
8
5

X=12;

(3) x:0.4=
3
10
12
5

12
5
x=0.4×
3
10

12
5
12
5
=0.4×
3
10
÷
12
5

x=0.4×
3
10
×
5
12

x=
1
20
1
8
1 8 1 1 1 8 8 8
X=9.6,

(2)X:
5
14
=21:
5
8

5
8
X=
5
14
×21,
5
8
5
8
=
5
14
×21÷
5
8

X=
5
14
×21×
8
5

X=12;

(3) x:0.4=
3
10
12
5

12
5
x=0.4×
3
10

12
5
12
5
=0.4×
3
10
÷
12
5

x=0.4×
3
10
×
5
12

x=
1
20
5
14
5 14 5 5 5 14 14 14 =21:
5
8

5
8
X=
5
14
×21,
5
8
5
8
=
5
14
×21÷
5
8

X=
5
14
×21×
8
5

X=12;

(3) x:0.4=
3
10
12
5

12
5
x=0.4×
3
10

12
5
12
5
=0.4×
3
10
÷
12
5

x=0.4×
3
10
×
5
12

x=
1
20
5
8
5 8 5 5 5 8 8 8 ,
5
8
X=
5
14
×21,
5
8
5
8
=
5
14
×21÷
5
8

X=
5
14
×21×
8
5

X=12;

(3) x:0.4=
3
10
12
5

12
5
x=0.4×
3
10

12
5
12
5
=0.4×
3
10
÷
12
5

x=0.4×
3
10
×
5
12

x=
1
20
5
8
5 8 5 5 5 8 8 8 X=
5
14
×21,
5
8
5
8
=
5
14
×21÷
5
8

X=
5
14
×21×
8
5

X=12;

(3) x:0.4=
3
10
12
5

12
5
x=0.4×
3
10

12
5
12
5
=0.4×
3
10
÷
12
5

x=0.4×
3
10
×
5
12

x=
1
20
5
14
5 14 5 5 5 14 14 14 ×21,
5
8
5
8
=
5
14
×21÷
5
8

X=
5
14
×21×
8
5

X=12;

(3) x:0.4=
3
10
12
5

12
5
x=0.4×
3
10

12
5
12
5
=0.4×
3
10
÷
12
5

x=0.4×
3
10
×
5
12

x=
1
20
5
8
5 8 5 5 5 8 8 8 X÷
5
8
=
5
14
×21÷
5
8

X=
5
14
×21×
8
5

X=12;

(3) x:0.4=
3
10
12
5

12
5
x=0.4×
3
10

12
5
12
5
=0.4×
3
10
÷
12
5

x=0.4×
3
10
×
5
12

x=
1
20
5
8
5 8 5 5 5 8 8 8 =
5
14
×21÷
5
8

X=
5
14
×21×
8
5

X=12;

(3) x:0.4=
3
10
12
5

12
5
x=0.4×
3
10

12
5
12
5
=0.4×
3
10
÷
12
5

x=0.4×
3
10
×
5
12

x=
1
20
5
14
5 14 5 5 5 14 14 14 ×21÷
5
8

X=
5
14
×21×
8
5

X=12;

(3) x:0.4=
3
10
12
5

12
5
x=0.4×
3
10

12
5
12
5
=0.4×
3
10
÷
12
5

x=0.4×
3
10
×
5
12

x=
1
20
5
8
5 8 5 5 5 8 8 8 ,
X=
5
14
×21×
8
5

X=12;

(3) x:0.4=
3
10
12
5

12
5
x=0.4×
3
10

12
5
12
5
=0.4×
3
10
÷
12
5

x=0.4×
3
10
×
5
12

x=
1
20
5
14
5 14 5 5 5 14 14 14 ×21×
8
5

X=12;

(3) x:0.4=
3
10
12
5

12
5
x=0.4×
3
10

12
5
12
5
=0.4×
3
10
÷
12
5

x=0.4×
3
10
×
5
12

x=
1
20
8
5
8 5 8 8 8 5 5 5 ,
X=12;

(3) x:0.4=
3
10
12
5

12
5
x=0.4×
3
10

12
5
12
5
=0.4×
3
10
÷
12
5

x=0.4×
3
10
×
5
12

x=
1
20
x:0.4=
3
10
3 10 3 3 3 10 10 10 :
12
5
12 5 12 12 12 5 5 5 ,
12
5
x=0.4×
3
10

12
5
12
5
=0.4×
3
10
÷
12
5

x=0.4×
3
10
×
5
12

x=
1
20
12
5
12 5 12 12 12 5 5 5 x=0.4×
3
10

12
5
12
5
=0.4×
3
10
÷
12
5

x=0.4×
3
10
×
5
12

x=
1
20
3
10
3 10 3 3 3 10 10 10 ,
12
5
12
5
=0.4×
3
10
÷
12
5

x=0.4×
3
10
×
5
12

x=
1
20
12
5
12 5 12 12 12 5 5 5 x÷
12
5
=0.4×
3
10
÷
12
5

x=0.4×
3
10
×
5
12

x=
1
20
12
5
12 5 12 12 12 5 5 5 =0.4×
3
10
÷
12
5

x=0.4×
3
10
×
5
12

x=
1
20
3
10
3 10 3 3 3 10 10 10 ÷
12
5

x=0.4×
3
10
×
5
12

x=
1
20
12
5
12 5 12 12 12 5 5 5 ,
x=0.4×
3
10
×
5
12

x=
1
20
3
10
3 10 3 3 3 10 10 10 ×
5
12

x=
1
20
5
12
5 12 5 5 5 12 12 12 ,
x=
1
20
1
20
1 20 1 1 1 20 20 20 .