题目内容

5:x=3:9
54
x
=
4
5
x:
1
4
=4:
2
3
36:18=x:5.4
6
1.5
=
x
10
1:
1
2
=x:
1
3
3
8
2
5
=x:
6
5
5
6
2
3
=
1
8
:x
5
12
=
7
x
7
2
:x=
3
5
1
7
1
10
1
8
=x:
1
4
x
0.8
=1.5:4
X:1.5=25%
x
13
=0.6
2.5
x
=
2
25
x:
3
4
=
8
9
(1)5:x=3:9,
3x=5×9,
3x÷3=45÷3,
x=15;

(2)
54
x
=
4
5

4x=54×5,
4x÷4=270÷4,
x=67.5;

(3)x:
1
4
=4:
2
3

2
3
x=
1
4
×4,
2
3
x÷
2
3
=1÷
2
3

x=
3
2


(4)36:18=x:5.4,
18x=36×5.4,
18x÷18=194.4÷18,
x=10.8;

(5)
6
1.5
=
x
10

1.5x=6×10,
1.5x÷1.5=60÷1.5,
x=40;

(6)1:
1
2
=x:
1
3

1
2
x=1×
1
3

1
2
x÷
1
2
=
1
3
÷
1
2

x=
2
3


(7)
3
8
2
5
=x:
6
5

2
5
x=
3
8
×
6
5

2
5
x÷
2
5
=
9
20
÷
2
5

x=
9
8


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

5
6
x÷
5
6
=
1
12
÷
5
6

x=
1
10


(9)
2
12
=
7
x

2x=12×7,
2x÷2=84÷2,
x=42;

(10)
7
2
:x=
3
5
1
7

3
5
x=
7
2
×
1
7

3
5
x÷
3
5
=
1
2
÷
3
5

x=
5
6


(11)
1
10
1
8
=x:
1
4

1
8
x=
1
10
×
1
4

1
8
x÷
1
8
=
1
40
÷
1
8

x=
1
5


(12)
x
0.8
=1.5:4,
4x=1.5×0.8,
4x÷4=1.2÷4,
x=0.3;

(13)X:1.5=25%,
X=1.5×25%,
X=0.375;

(14)
x
13
=0.6,
x=13×0.6,
x=7.8;

(15)
2.5
x
=
2
25

2x=2.5×25,
2x÷2=62.5÷2,
x=31.25;

(16)x:
3
4
=
8
9

x=
3
4
×
8
9

x=
2
3
练习册系列答案
相关题目

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网