河南省商丘市柘城县2017-2018学年七年级下学期期末考试数学试题

适用年级:初一
试卷号:185340

试卷类型:期末
试卷考试时间:2018/8/3

1.单选题(共7题)

1.
已知是二元一次方程组的解,则的算术平方根为()
A.±2B.C.2D.4
2.
如图,AB⊥BC,∠ABD的度数比∠DBC的度数的两倍少15°,设∠ABD和∠DBC的度数分别为x°、y°,那么下面可以求出这两个角的度数的方程组是(  )
A.B.C.D.
3.
八年级某班级部分同学去植树,若每人平均植树7棵,还剩9棵,若每人平均植树9棵,则有1位同学植树的棵数不到8棵.若设同学人数为x人,植树的棵数为(7x+9)棵,下列各项能准确的求出同学人数与种植的树木的数量的是(  )
A.7x+9≤8+9(x﹣1)B.7x+9≥9(x﹣1)C.D.
4.
若不等式组的解集为2<x<3,则a,b的值分别为(  )
A. -2,3 B. 2,-3 C. 3,-2 D. -3,2
5.
如果点P(2x+6,x-4)在平面直角坐标系的第四象限内,那么x的取值范围在数轴上可表示为
A.B.C.D.
6.
若5x3m-2n-2yn-m+11=0是二元一次方程,则(  )
A.m=1,n=2B.m=2,n=1C.m=-1,n=2D.m=3,n=4
7.
某校在“创建素质实践行”活动中组织学生进行社会调查,并对学生的调查报告进行了评比.如图是将某年级60篇学生调查报告的成绩进行整理,分成5组画出的频数分布图.已知从左到右4个小组的百分比分别是5%,15%,35%,30%,那么在这次评比中被评为优秀的调查报告有(分数大于或等于80分为优秀,且分数为整数)(  )
A.18篇B.24篇C.25篇D.27篇

2.选择题(共3题)

8.

我国人口密集区和稀疏区的分界线是(  )

9.阅读理解

    My elder cousin Ted liked complaining almost about everything. When he faced a problem, he always chose to complain about it instead of finding a way to solve it. That was not right. Ted was healthy and had received a good education. He should and could find a good job and work hard to feed himself, but he just complained all day, drifting from one job to another. One day, I read about a farmer called Chris and told Ted about the farmer.

    Chris works hard, performs many jobs around the farm. But Chris is not exactly like other farmers. What makes him different is that he was born without arms or legs. But this has not stopped him from working hard and getting things done.

    Now, you may ask, is this possible? Like many other amazing people who have no arms or legs, Chris does not focus on what he can't do, but rather on what he can do. And he can do a lot! He drives farm vehicles and looks after crops. Once you see Chris in action, you will think there is nothing he could not do.

    Chris is a great example of a person who is making the most of his gifts. His positive attitude and courage make him a true inspiration.

    After I told Ted about Chris, he became silent. Compared with Chris, Ted was much luckier. Then luckily, I saw Ted's change.

    Do you like complaining? If you do, think about Chris. Such a man chooses to stay positive. Why don't we?

10.下面计算对吗?

42÷25=168


3.填空题(共5题)

11.
按如图的运算程序,能使输出结果为3的x,y的值是_____(写一值即可).
12.
在平面直角坐标系中,P点关于原点的对称点为P1(﹣3,﹣),P点关于x轴的对称点为P2(a,b),则=_____
13.
49的平方根是_____,﹣27的立方根是_____.
14.
已知且-1<x-y<0,则k的取值范围为
15.
定义:f (a,b)=(﹣a,b),g(m,n)=(m,﹣n),例 f (1,2)=(﹣1,2),g(﹣4,﹣5)=(﹣4,5),则 g( f (2,﹣3))=_____.

4.解答题(共5题)

16.
解方程组:.
17.
某景点的门票价格如表:
购票人数/人
1~50
51~100
100以上
每人门票价/元
12
10
8
 
某校七年级(1)、(2)两班计划去游览该景点,其中(1)班人数少于50人,(2)班人数多于50人且少于100人,如果两班都以班为单位单独购票,则一共支付1118元;如果两班联合起来作为一个团体购票,则只需花费816元.
(1)两个班各有多少名学生?
(2)团体购票与单独购票相比较,两个班各节约了多少钱?
18.
某中学为了绿化校园,计划购买一批榕树和香樟树,经市场调查榕树的单价比香樟树少20元,购买3棵榕树和2棵香樟树共需340元.
(1)请问榕树和香樟树的单价各多少?
(2)根据学校实际情况,需购买两种树苗共150棵,总费用不超过10840元,且购买香樟树的棵数不少于榕树的1.5倍,请你算算,该校本次购买榕树和香樟树共有哪几种方案.
19.
解不等式组,并把解集在如图所示的数轴上表示出来.
20.
如图,AB∥CD,∠1:∠2:∠3=1:2:3,说明BA平分∠EBF的道理.
试卷分析
  • 【1】题量占比

    单选题:(7道)

    选择题:(3道)

    填空题:(5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:0

    5星难题:0

    6星难题:10

    7星难题:0

    8星难题:3

    9星难题:4