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【数学】2025年七中八年级期中试卷分析

  • 2026-04-15 07:45:05
【数学】2025年七中八年级期中试卷分析
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一、题型难度与所属考点
各题目的考点与难度如下：

试卷整体难度适中，考察范围为八下前三单元内容的学习内容，知识点覆盖较为全面。

·预警线：75分
·优秀线：90分

二、经典题型分析

（一）重难点题

【选择压轴题】

--------------    解     析    -------------

·选择压轴题考查了一元二次方程与图形面积结合的问题，读懂题意并数形结合是解题的关键，需要学生能正确用代数式表示出目标图形的面积并求解。

【填空压轴题】

--------------    解     析    -------------

·填空压轴题考查了整式的混合运算，涉及矩形面积，一元二次方程的判别式等，解题的关键是由有且只有一个a的值，使得到的矩形面积为2s，列出关于s 的方程。

【解答压轴题】

--------------    解     析    -------------

·解答压轴题为近年常考的一元二次方程新定义问题，学生要能熟练掌握韦达定理的应用，以及正确理解“邻根方程”的定义。

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  1. CONNECT:[ UseTime:0.000731s ] mysql:host=127.0.0.1;port=3306;dbname=www_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001201s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.002205s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.001193s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001097s ]
  6. SELECT * FROM `set` [ RunTime:0.000488s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001175s ]
  8. SELECT * FROM `article` WHERE `id` = 476201 LIMIT 1 [ RunTime:0.001931s ]
  9. UPDATE `article` SET `lasttime` = 1776415274 WHERE `id` = 476201 [ RunTime:0.004093s ]
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0.115198s