内容正文:
2018学年第二学期八年级数学期中抽测参考答案
一、选择题:
1、
2、
3、
4、
5、
6、
7、
8、
9、
10、
A
D
D
C
C
C
C
A
B
A
二、填空题:
11、
12、
13、
14、
15、
16、
12
18
AB=BC
(多个答案)
5
11
三、解答题:
17、(1)
解:原式=
``````````````````````````````4
分
=
``````````````````````````````5分
(2)
解:原式=
``````````````````````````````2分
=
``````````````````````````````3
分
=
``````````````````````````````5分
(3)
解:原式=
`````````````````3
分
=
``````````````````````````````5
分
(4)
解:原式=
```````````````````````3
分
=
``````````````````````````````4
分
= -13-
``````````````````````````````5分
18、方法一:(直接代入)
解:当
时,
原式
``````````````````````````````2
分
``````````````````````````````7
分
=0````````````````````````````````````````````9
分
方法二:(先变形)
解:
````````````5分
当
时,
````````````````6
分
```````````````````7分
=2-2 `````````````````````8分
=0 ````````````````````9分
19、解:
``````````````````````````````3分
=3 ``````````````````````````````