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番禺原创微课 | 中考数学复习系列:二元一次方程组

  • 2026-09-23 07:39:38
番禺原创微课 | 中考数学复习系列:二元一次方程组
今日分享 微课视频

     嗨〜同学们好！欢迎来到番禺区微课堂，今天我们学习的内容是中考数学复习系列知识点——二元一次方程组。解二元一次方程组是中考的必考内容，主要有两种形式，一类是直接求以二元一次方程组的形式出现，例如广州中考2015年的第7题和2019年的17题，第二类是以求抛物线的解析式出现，例如2017年第24题第一问。那么，今天我们就来一起学习二元一次方程组的解法：代入消元法、加减消元法。点击视频，一切来复习中考必考知识点吧！

微课名称：《二元一次方程组》

学段学科：初中数学

教材版本：人教版数学九年级中考复习

主讲老师：番禺区育龙中学 黄芬

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本平台发布的微课及微课应用案例视频，属于广州市番禺区教师发展中心可视化学习行动计划（中小学微课资源深化研究与应用实践项目）课题成果，版权归主讲教师所有，如需引用，请在公众号后台留言联系我们，侵权必究。

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  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000710s ]
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  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000641s ]
  8. SELECT * FROM `article` WHERE `id` = 515036 LIMIT 1 [ RunTime:0.000355s ]
  9. UPDATE `article` SET `lasttime` = 1790129000 WHERE `id` = 515036 [ RunTime:0.001199s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000339s ]
  11. SELECT * FROM `article` WHERE `id` < 515036 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000380s ]
  12. SELECT * FROM `article` WHERE `id` > 515036 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000356s ]
  13. SELECT * FROM `article` WHERE `id` < 515036 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000645s ]
  14. SELECT * FROM `article` WHERE `id` < 515036 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000848s ]
  15. SELECT * FROM `article` WHERE `id` < 515036 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000597s ]
0.081872s