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2026版八下数学寒假自学讲义12讲

  • 2026-04-04 14:04:31
2026版八下数学寒假自学讲义12讲
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     今天为同学们带来2026版八年级下册数学寒假自学讲义，全册共12讲，精准对标人教版八下新教材，聚焦前三章核心内容展开预习规划。

本次新教材做了重要调整，在原有知识体系基础上，新增四边形及多边形章节。对比旧版教材，这部分内容既是知识拓展重点，也是八下数学学习的难点所在。

建议同学们把握寒假黄金预习期，优先攻克四边形板块，不仅要夯实基础概念，更要针对性开展提升训练，为新学期数学学习抢占先机！

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  1. CONNECT:[ UseTime:0.000958s ] mysql:host=127.0.0.1;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001389s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000689s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000638s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001646s ]
  6. SELECT * FROM `set` [ RunTime:0.000627s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001577s ]
  8. SELECT * FROM `article` WHERE `id` = 464473 LIMIT 1 [ RunTime:0.001186s ]
  9. UPDATE `article` SET `lasttime` = 1775944058 WHERE `id` = 464473 [ RunTime:0.001591s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000601s ]
  11. SELECT * FROM `article` WHERE `id` < 464473 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000991s ]
  12. SELECT * FROM `article` WHERE `id` > 464473 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000921s ]
  13. SELECT * FROM `article` WHERE `id` < 464473 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001496s ]
  14. SELECT * FROM `article` WHERE `id` < 464473 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001801s ]
  15. SELECT * FROM `article` WHERE `id` < 464473 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002449s ]
0.130838s