问题 解答题
解方程
x-40%x=120
2
3
1
4
=12
0.36×5-
3
4
x=
3
5
4X-6×
2
3
=2.
答案

(1)x-40%x=120,

0.6x=120,

0.6x÷0.6=120÷0.6,

x=200;

(2)

2
3
1
4
=12,

2
3
1
4
×
1
4
=12×
1
4

2
3
X=3,

2
3
2
3
=3÷
2
3

X=

9
2

(3)0.36×5-

3
4
x=
3
5

1.8-

3
4
x=
3
5

1.8-

3
4
x+
3
4
x=
3
5
+
3
4
x,

3
4
x+
3
5
=1.8,

3
4
x+
3
5
-
3
5
=1.8-
3
5

3
4
x=1.2,

3
4
3
4
=1.2÷
3
4

x=1.6;

(4)4X-6×

2
3
=2,

4X-4=2,

4X-4+4=2+4,

4X=6,

4X÷4=6÷4,

x=1.5.

问答题 简答题
单项选择题