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2023年山东省济南市中考数学试卷

  • 2026-04-04 13:45:06
2023年山东省济南市中考数学试卷

2023年山东省济南市中考数学试卷

一、选择题:本题共10小题,每小题4分,共40.每小题只有一个选项符合题目要求.

1.(4分)下列几何体中,主视图是三角形的为(  )

ABCD

2.(4分)2022年我国粮食总产量再创新高,达686530000吨.将数字686530000用科学记数法表示为(  )

A0.68653×108B6.8653×108

C6.8653×107D68.653×107

3.(4分)如图,一块直角三角板的直角顶点放在直尺的一边上.如果∠170°,那么∠2的度数是(  )

A20°B25°C30°D45°

4.(4分)实数ab在数轴上对应点的位置如图所示,则下列结论正确的是(  )

Aab0Ba+b0Ca+3b+3D.﹣3a<﹣3b

5.(4分)如图是度量衡工具汉尺、秦权、新莽铜卡尺和商鞅方升的示意图,其中既是轴对称图形又是中心对称图形的是(  )

AB

CD

6.(4分)下列运算正确的是(  )

Aa2a4a8Ba4a3aC.(a23a5Da4÷a2a2

7.(4分)已知点A(﹣4y1),B(﹣2y2),C3y3)都在反比例函数yk0)的图象上,则y1y2y3的大小关系为(  )

Ay3y2y1By1y3y2Cy3y1y2Dy2y3y1

8.(4分)从甲、乙、丙、丁4名同学中随机抽取2名同学参加图书节志愿服务活动,其中甲同学是女生,乙、丙、丁同学都是男生,被抽到的2名同学都是男生的概率为(  )

ABCD

9.(4分)如图,在△ABC中,ABAC,∠BAC36°,以点C为圆心,以BC为半径作弧交AC于点D,再分别以BD为圆心,以大于BD的长为半径作弧,两弧相交于点P,作射线CPAB于点E,连接DE.以下结论不正确的是(  )

A.∠BCE36°BBCAE

CD

10.(4分)定义:在平面直角坐标系中,对于点Px1y1),当点Qx2y2)满足2x1+x2)=y1+y2时,称点Qx2y2)是点Px1y1)的“倍增点”.已知点P110),有下列结论:

Q138),Q2(﹣2,﹣2)都是点P1的“倍增点”;

若直线yx+2上的点A是点P1的“倍增点”,则点A的坐标为(24);

抛物线yx22x3上存在两个点是点P1的“倍增点”;

若点B是点P1的“倍增点”,则P1B的最小值是

其中,正确结论的个数是(  )

A1B2C3D4

二、填空题:本题共6小题,每小题4分,共24分.直接填写答案.

11.(4分)因式分解:m216

12.(4分)围棋起源于中国,棋子分黑白两色.一个不透明的盒子中装有3个黑色棋子和若干个白色棋子,每个棋子除颜色外都相同,任意摸出一个棋子,摸到黑色棋子的概率是,则盒中棋子的总个数是个.

13.(4分)关于x的一元二次方程x24x+2a0有实数根,则a的值可以是(写出一个即可).

14.(4分)如图,正五边形ABCDE的边长为2,以A为圆心,以AB为半径作弧BE,则阴影部分的面积为(结果保留π).

15.(4分)学校提倡“低碳环保,绿色出行”,小明和小亮分别选择步行和骑自行车上学,两人各自从家同时同向出发,沿同一条路匀速前进.如图所示,l1l2分别表示两人到小亮家的距离skm)和时间th)的关系,则出发h后两人相遇.

16.(4分)如图,将菱形纸片ABCD沿过点C的直线折叠,使点D落在射线CA上的点E处,折痕CPAD于点P.若∠ABC30°,AP2,则PE的长等于

三、解答题:本题共10小题,共86分.解答应写出文字说明、证明过程或演算步骤.

17.(6分)计算:||+1+π+10tan60°.

18.(6分)解不等式组:,并写出它的所有整数解.

19.(6分)已知:如图,点OABCD对角线AC的中点,过点O的直线与ADBC分别相交于点EF.求证:DEBF

20.(8分)图1是某越野车的侧面示意图,折线段ABC表示车后盖,已知AB1mBC0.6m,∠ABC123°,该车的高度AO1.7m.如图2,打开后备厢,车后盖ABC落在AB'C'处,AB'与水平面的夹角∠B'AD27°.

1)求打开后备厢后,车后盖最高点B'到地面l的距离;

2)若小琳爸爸的身高为1.8m,他从打开的车后盖C'处经过,有没有碰头的危险?请说明理由.(结果精确到0.01m,参考数据:sin27°≈0.454cos27°≈0.891tan27°≈0.5101.732

21.(8分)2023年,国内文化和旅游行业复苏势头强劲.某社团对30个地区“五一”假期的出游人数进行了调查,获得了它们“五一”假期出游人数(出游人数用m表示,单位:百万)的数据,并对数据进行统计整理.数据分成5组:A组:1m12B组:12m23C组:23m34D组:34m45E组:45m56.下面给出了部分信息:

aB组的数据:1213151617171820

b.不完整的“五一”假期出游人数的频数分布直方图和扇形统计图如图:

请根据以上信息完成下列问题:

1)统计图中E组对应扇形的圆心角为度;

2)请补全频数分布直方图;

3)这30个地区“五一”假期出游人数的中位数是百万;

4)各组“五一”假期的平均出游人数如表:

组别

A

1m12

B

12m23

C

23m34

D

34m45

E

45m56

平均出游人数(百万)

5.5

16

32.5

42

50

求这30个地区“五一”假期的平均出游人数.

22.(8分)如图,ABCDO的直径,CO上一点,过点C的切线与AB的延长线交于点P,∠ABC2BCP,点E的中点,弦CEBD相交于点F

1)求∠OCB的度数;

2)若EF3,求O直径的长.

23.(10分)某校开设智能机器人编程的校本课程,购买了AB两种型号的机器人模型.A型机器人模型单价比B型机器人模型单价多200元,用2000元购买A型机器人模型和用1200元购买B型机器人模型的数量相同.

1)求A型,B型机器人模型的单价分别是多少元?

2)学校准备再次购买A型和B型机器人模型共40台,购买B型机器人模型不超过A型机器人模型的3倍,且商家给出了两种型号机器人模型均打八折的优惠.问购买A型和B型机器人模型各多少台时花费最少?最少花费是多少元?

24.(10分)综合与实践

如图1,某兴趣小组计划开垦一个面积为8m2的矩形地块ABCD种植农作物,地块一边靠墙,另外三边用木栏围住,木栏总长为am

【问题提出】

小组同学提出这样一个问题:若a10,能否围出矩形地块?

【问题探究】

小颖尝试从“函数图象”的角度解决这个问题:

ABxmBCym.由矩形地块面积为8m2,得到xy8,满足条件的(xy)可看成是反比例函数y的图象在第一象限内点的坐标;木栏总长为10m,得到2x+y10,满足条件的(xy)可看成一次函数y=﹣2x+10的图象在第一象限内点的坐标,同时满足这两个条件的(xy)就可以看成两个函数图象交点的坐标.

如图2,反比例函数yx0)的图象与直线l1y=﹣2x+10的交点坐标为(18)和,因此,木栏总长为10m时,能围出矩形地块,分别为:AB1mBC8m;或ABmBCm

1)根据小颖的分析思路,完成上面的填空;

【类比探究】

2)若a6,能否围出矩形地块?请仿照小颖的方法,在图2中画出一次函数图象并说明理由;

【问题延伸】

当木栏总长为am时,小颖建立了一次函数y=﹣2x+a.发现直线y=﹣2x+a可以看成是直线y=﹣2x通过平移得到的,在平移过程中,当过点(24)时,直线y=﹣2x+a与反比例函数yx0)的图象有唯一交点.

3)请在图2中画出直线y=﹣2x+a过点(24)时的图象,并求出a的值;

【拓展应用】

小颖从以上探究中发现“能否围成矩形地块问题”可以转化为“y=﹣2x+ay图象在第一象限内交点的存在问题”.

4)若要围出满足条件的矩形地块,且ABBC的长均不小于1m,请直接写出a的取值范围.

25.(12分)在平面直角坐标系xOy中,正方形ABCD的顶点ABx轴上,C23),D(﹣13).抛物线yax22ax+ca0)与x轴交于点E(﹣20)和点F

1)如图1,若抛物线过点C,求抛物线的表达式和点F的坐标;

2)如图2,在(1)的条件下,连接CF,作直线CE,平移线段CF,使点C的对应点P落在直线CE上,点F的对应点Q落在抛物线上,求点Q的坐标;

3)若抛物线yax22ax+ca0)与正方形ABCD恰有两个交点,求a的取值范围.

26.(12分)在矩形ABCD中,AB2AD2,点E在边BC上,将射线AE绕点A逆时针旋转90°,交CD延长线于点G,以线段AEAG为邻边作矩形AEFG

1)如图1,连接BD,求∠BDC的度数和的值;

2)如图2,当点F在射线BD上时,求线段BE的长;

3)如图3,当EAEC时,在平面内有一动点P,满足PEEF,连接PAPC,求PA+PC的最小值.

2023年山东省济南市中考数学试卷

参考答案

一、选择题:本题共10小题,每小题4分,共40.每小题只有一个选项符合题目要求.

1A2B3A4D5A6D7C8B9C10C

二、填空题:本题共6小题,每小题4分,共24分.直接填写答案.

11m+4)(m4121213114150.3516

三、解答题:本题共10小题,共86分.解答应写出文字说明、证明过程或演算步骤.

1731801219证明:∵四边形ABCD是平行四边形,

ADBCADBC

∴∠EAO=∠FCO,∠OEA=∠OFC

∵点O为对角线AC的中点,

AOCO

在△AOE和△COF中,

∴△AOE≌△COFAAS),

AECF

ADAEBCCF

DEBF2012.15m

2)没有危险,理由如下:

如图,过C′作CFBE,垂足为点F

∵∠BAD27°,∠BEA90°,

∴∠ABE63°,

∵∠ABC′=∠ABC123°,

∴∠CBF=∠ABC′﹣∠ABE60°,

RtBFC′中,BC′=BC0.6m

BFBC′•cos60°=0.3m

∵平行线间的距离处处相等,

C′到地面的距离为2.150.31.85m

1.851.8

∴没有危险.213615.522160°.

223244242251F40);(2)(﹣4,﹣6);(3261)∠BDC60°,

2

34

声明:试题解析著作权属菁优网所有,未经书面同意,不得复制发布日期:2026/3/29 9:37:49;用户:高新玲;邮箱:jnhyzx13@xyh.com;学号:30631649

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  1. CONNECT:[ UseTime:0.000526s ] mysql:host=127.0.0.1;port=3306;dbname=www_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000915s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000325s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000331s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000598s ]
  6. SELECT * FROM `set` [ RunTime:0.000211s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000646s ]
  8. SELECT * FROM `article` WHERE `id` = 471183 LIMIT 1 [ RunTime:0.000565s ]
  9. UPDATE `article` SET `lasttime` = 1775362324 WHERE `id` = 471183 [ RunTime:0.000764s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000245s ]
  11. SELECT * FROM `article` WHERE `id` < 471183 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000440s ]
  12. SELECT * FROM `article` WHERE `id` > 471183 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000351s ]
  13. SELECT * FROM `article` WHERE `id` < 471183 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001217s ]
  14. SELECT * FROM `article` WHERE `id` < 471183 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000656s ]
  15. SELECT * FROM `article` WHERE `id` < 471183 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002515s ]
0.077994s