山东省荣成市35中学石岛联盟2017-2018学年八年级上学期期中考试数学试题

适用年级:初二
试卷号:592969

试卷类型:期中
试卷考试时间:2017/11/15

1.单选题(共12题)

1.
下列分解因式错误的是( )
A.B.
C.D.
2.
下列各式中,能用平方差公式分解因式的是(    )
A.B.C.D.
3.
若关于的多项式含有因式,则实数的值为(  )
A.B.C.D.
4.
已知可以被在0~10之间的两个整数整除,则这两个数是(   )
A.1、3B.3、5C.6、8D.7、9
5.
如果为整数,那么使分式的值为整数的的值有(    )
A.2个B.3个C.4个D.5个
6.
把分式中的都扩大为原来的3倍,分式的值(    )
A.不变B.扩大3倍C.缩小为原来的D.扩大9倍
7.
下列变形正确的是(    )
A.B.
C.D.
8.
下列各式是分式的有( )个
A.B.C.D.
9.
分式x÷化简后的结果为 (   )
A.1B.xyC.D.
10.
已知ab0的结果为(  )
A.0B.正数C.负数D.不能确定
11.
某工厂原计划完成120个零件,每天生产x个,采用新技术后,每天可多生产2个零件,结果提前3天完成.可列方程(  )
A.B.
C.D.
12.
已知一组数据从小到大依次为-1,0,4,x,6,15,中位数为5,则其众数为 (    )
A.4B.5C.5.5D.6

2.选择题(共3题)

13.

根据短文理解选择正确答案。

      Everyone needs friends. Friends bring us happiness and hope in our lives. But the ability to make friends changes from person to person. To some people, making friends is easy, and to others it's very difficult.

      Making friends is a skill, and the first thing is to know how to get on with others.

      If you have trouble in making friends, maybe I can tell you how to do it.

      ★Realize your own good points. You have skills and talents(才能) that others will like.

      ★ Believe that you are a good person and have something nice to share with others.

      ★ Be humourous. Learn to laugh at yourself and your weakness. Remember to smile at others.

      ★ Respect(尊敬) others. Everyone has his own idea. Learn how to listen to others’ ideas without trying to make them accept(接受) yours.

      ★ Be kind. If you are kind to others, they will usually be kind to you. There are hundreds of little things you can do to show your kindness. Open the door for someone. Wave to a friend and so on.

      ★  Don't complain(抱怨). Learn to accept what you can't change, and work hard to change what you can. No one is willing to hear your complaints all the time.

      ★ Never give up. Even if you are faced with some closed-minded people, never give up. And try to find someone who will understand you.

14.

关于小磁针,下列描述错误的是(  )

15.

关于小磁针,下列描述错误的是(  )

3.填空题(共4题)

16.
如果是一个完全平方式,那么的值是________.
17.
若分式若,则=________________.
18.
若代数式的值为零,则代数式(a+2)(a2-1)-24的值是_________.
19.
关于的方程的解是负数,则的取值范围是    .

4.解答题(共5题)

20.
因式分解:
(1); (2)
(3) ; (4)
21.
计算:
(1);     (2)
(3);    (4)
22.
化简求值:已知:,求的值
23.
当m为何值时,关于x的方程有增根?
24.
(10分) 铭润超市用5000元购进一批新品种的苹果进行试销,由于销售状况良好,超市又调拨11000元资金购进该品种苹果,但这次的进货价比试销时每千克多了0.5元,购进苹果数量是试销时的2倍.
(1)试销时该品种苹果的进货价是每千克多少元?
(2)如果超市将该品种苹果按每千克7元的定价出售,当大部分苹果售出后,余下的400千克按定价的七折(“七折”即定价的70%)售完,那么超市在这两次苹果销售中共盈利多少元?
试卷分析
  • 【1】题量占比

    单选题:(12道)

    选择题:(3道)

    填空题:(4道)

    解答题:(5道)

  • 【2】:难度分析

    1星难题:0

    2星难题:0

    3星难题:0

    4星难题:1

    5星难题:0

    6星难题:12

    7星难题:0

    8星难题:4

    9星难题:4