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2026年北京顺义区初一(下)期末数学试卷解析

  • 2026-07-14 21:27:15
2026年北京顺义区初一(下)期末数学试卷解析

期末临近！今日京考研习社整理了2026年北京顺义区初一（下）期末数学试卷解析相关内容，同步分享给各位同学与家长，助力大家期末备考、查漏补缺！文末附获取方式！

2026年北京顺义区初一（下）期末数学试卷

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试卷评析
本卷覆盖有理数运算、方程与不等式、整式乘除、平行线、统计、平移变换等七年级核心内容，共30题，题量较大。整体难度中等偏上，较大兴卷明显拔高，与昌平卷相当，但在新定义与动态几何上更为突出。
一、基础题覆盖全面，但渗透思维要求
选择题第1-9题多为常规计算、概念辨析与图表读取，第7题台球角度结合余角与对顶角，需两步推理；第9题统计图增速理解，需区分“日均产量”与“当月增速”的关系，易因概念混淆失分。第10题含参方程组四个结论逐一判断，涉及解方程、相反数、恒等式与不等式，综合性强，是选择题区分关键。填空第16题面积关系需设元列式，第18题工序调度需枚举最优顺序，考查统筹规划，设问新颖。
二、解答题梯度分明，中档题注重代数变形与几何逻辑
第19-24题为计算、解方程组不等式及化简求值，难度平缓。第25题平行线证明填空，直接考查判定定理。第26题统计折线图补全与平均数中位数比较，规则清晰，计算简单。第27题平移作图步骤排序与面积差，需理解平移后平行四边形面积关系，利用 SAA’C’C−SAA’B’BSAA’C’C−SAA’B’B 得出 SBB’C’C=10SBB’C’C=10，对图形变换的代数表示有要求。
三、应用题与几何压轴体现选拔功能
第28题走马灯转速问题，列方程组求单量，再结合不等式求采购方案数，需枚举整数解，模型常规但运算量尚可。第29题平行线背景下角平分线与动点G，需补全图形，分情况讨论 ∠FGM∠FGM 与 ∠EMG∠EMG 的关系，涉及角平分线、平行线性质及外角定理，分类讨论完整性与几何推理严谨性要求较高。第30题新定义“b关联点”，结合数轴平移与参数范围，需根据原线段长度 aa 判断平移方向，再转化为区间包含关系，第（2）问还要处理点P的平移与线段GH的关联，抽象度与分类复杂度均高，为全卷最难小题。
全卷基础分约65分，中档约20分，压轴约15分。今后复习上需强化含参方程组的整体处理、几何动态问题的分类意识，以及新定义条件的区间转化能力。优秀生应在压轴题的完整性与严谨性上重点突破，中等生需确保基础题满分，争取中档题稳定得分。

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  1. CONNECT:[ UseTime:0.000603s ] mysql:host=127.0.0.1;port=3306;dbname=www_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000691s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.003751s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000353s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000549s ]
  6. SELECT * FROM `set` [ RunTime:0.000241s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000576s ]
  8. SELECT * FROM `article` WHERE `id` = 507224 LIMIT 1 [ RunTime:0.000375s ]
  9. UPDATE `article` SET `lasttime` = 1784042992 WHERE `id` = 507224 [ RunTime:0.006207s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000274s ]
  11. SELECT * FROM `article` WHERE `id` < 507224 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000467s ]
  12. SELECT * FROM `article` WHERE `id` > 507224 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000401s ]
  13. SELECT * FROM `article` WHERE `id` < 507224 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000699s ]
  14. SELECT * FROM `article` WHERE `id` < 507224 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.017239s ]
  15. SELECT * FROM `article` WHERE `id` < 507224 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002461s ]
0.106407s