问题 解答题
2
3
X-
1
2
X=42
20:X=
1
6
1
5
X-0.125=
5
8
答案

2
3
x-
1
2
x=42,

x(

2
3
-
1
2
)=42,

1
6
x=42,

1
6
1
6
=42÷
1
6

x=252;

(2)20:X=

1
6
1
5

1
6
x=20×
1
5

1
6
x=4,

1
6
1
6
=4÷
1
6

x=24;

(3)X-0.125=

5
8

X-

1
8
+
1
8
=
5
8
+
1
8

x=

3
4

单项选择题 A1/A2型题
名词解释