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历城二模数学试卷 都考了啥

  • 2026-11-01 11:39:40
历城二模数学试卷 都考了啥

2026年历城二模数学试卷涵盖了初中数学的核心知识领域,包括数与代数、图形与几何、统计与概率。以下是各题知识点的详细分析:

一、数与代数(约65分)

题号

知识点

具体内容

1

实数比较

正数、负数、分数、无理数的大小比较(最小的是-3)

3

科学记数法

表示较大数(6710亿=6.71×10¹¹)

4

不等式性质

已知a≤b,判断不等式是否一定成立(注意方向与乘负数)

6

整式运算

合并同类项、积的乘方、同底数幂除法、同底数幂乘法

7

一元二次方程

已知一根求另一根(韦达定理或代入法)

8

概率

不放回抽取两张卡片,求特定组合的概率(1/6)

10

新定义变换(k级变换点)

理解坐标变换规则,判断函数图象上的点存在性、最值、参数范围(多结论)

11

因式分解

平方差公式(9-m²=(3+m)(3-m))

12

几何概率

正方形网格中黑色区域面积占整体面积的比例

14

一次函数应用

行程问题,根据图象求乙比甲早到的时间

16

实数运算

零指数幂、特殊角三角函数、二次根式、绝对值、负整数指数幂混合计算

17

不等式组

解一元一次不等式组,求正整数解

19(3)

加权平均

按40%和60%计算综合成绩,比较两款机器人

22

分式方程与不等式

分式方程求单价(倍数关系);一次函数最值(最少购买费用)

23

反比例函数与一次函数

求函数解析式,面积计算,等角条件求点坐标(分类讨论)

25

二次函数综合

求表达式及顶点坐标,相似或坐标变换求点坐标,抛物线内区域单调性求参数范围

二、图形与几何(约65分)

题号

知识点

具体内容

2

三视图

常见几何体的左视图形状判断(圆柱、圆锥、球、正方体等)

5

图形对称性

围棋棋子摆放图案,轴对称与中心对称识别

9

尺规作图与几何计算

角平分线、垂直平分线,利用相似或角平分线性质求三角形周长

13

平行线与正多边形

正五边形,对角线,平行线求角度

15

矩形折叠

折叠性质,EF∥AC,求线段AF长(相似或勾股定理)

18

菱形与全等

菱形性质,边相等,证明角相等(三角形全等)

19(1)(2)

统计中的方差

方差含义及比较(评价一致性)——可归入统计

20

解直角三角形应用

坡比、仰角,求高度(两次解三角形,含坡度)

21

圆与切线

等腰三角形,直径所对圆周角,切线的判定,相似或勾股求边长

23(3)

等角条件

反比例函数上点P满足∠BDP=∠ABC,利用相似或三角函数求m(分类讨论)

24

矩形旋转相似

动态矩形,线段数量关系与位置关系(手拉手模型),中点最值问题

25(2)(3)

抛物线中的几何变换

倍长PO得Q,构造矩形,求Q坐标;抛物线内部区域单调性

三、统计与概率(约20分)

题号

知识点

具体内容

8

概率

不放回抽取两张卡片(“仁”“善”)的概率

12

几何概率

正方形地板中黑色区域的概率(面积比)

19

统计

中位数、众数、方差,比较评价一致性,加权综合成绩计算

四、综合能力要求

-逻辑推理:第9、10、15、18、21、23(3)、24、25题需多步推理。

-运算求解:第16、17、20、22、23(2)等题考查基本计算与代数变形。

-数形结合:第10、14、23、25题借助图象分析函数与几何关系。

-模型应用:第20题(城楼测量)、第22题(采购优化)、第24题(旋转相似模型)体现数学建模。

-分类讨论:第10题(参数范围)、第23(3)题(等角条件)、第25(3)题(单调性)。

总体来看,试卷结构合理,基础题(约60分)、中档题(约50分)、压轴题(约40分)分布典型,注重对核心概念、基本方法和综合运用能力的考查。

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  14. SELECT * FROM `article` WHERE `id` < 496462 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000498s ]
  15. SELECT * FROM `article` WHERE `id` < 496462 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000558s ]
0.092430s