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2026南昌一模数学第20题本质解析及课件共享

  • 2026-05-01 14:13:30
2026南昌一模数学第20题本质解析及课件共享

反比例函数

【思考】

解题小结：

平面直角坐标系下“斜三角形”（底高为非横平竖直型）面积求解，通常处理方式为：①割补，②平移，两者都属于“改斜归正”的思维路径，具体选择哪一种要根据具体试题情景做好规划。主要区别在于，割补法较适用于学生常见思维，学生易想，但运算量较大。平移法较为灵活需要深刻理解面积的转化，运算量较小。（两种方法都是基于教材）

网络画板课件交互链接地址：

https://www.netpad.net.cn/presentationEditor/presentationPlay.html#share/4ad1c140-3ded-11f1-a88e-eba901bf229f

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  13. SELECT * FROM `article` WHERE `id` < 503375 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002652s ]
  14. SELECT * FROM `article` WHERE `id` < 503375 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.005855s ]
  15. SELECT * FROM `article` WHERE `id` < 503375 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.004132s ]
0.110024s