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【考公笔记】资料分析(1):截位直除

  • 2026-04-01 09:14:52
【考公笔记】资料分析(1):截位直除

截位直除是资料分析除法运算最基础的方法，必须掌握，再逐渐学习其它的运算技巧。下面主要参考高照老师的课程。

基本方式：以左边第1个非0数开始截，截几位就四舍五入保留几位数。

截几位？——看选项差距

 1. 选项差距大，截两位

首位均不同，或者首位相同第二位不同，但第二位差>首位

    ▲ 选项差距大，分母截两位

 2. 选项差距小，截三位

首位相同第二位不同，且第二位差<首位

    ▲ 选项差距小，分母截三位

 3. 多步除法，分子分母都截

观察是否可以约分

    ▲ 多步除法，分子分母都截

-END-

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  1. CONNECT:[ UseTime:0.000379s ] mysql:host=127.0.0.1;port=3306;dbname=d_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000646s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.002991s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000270s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000641s ]
  6. SELECT * FROM `set` [ RunTime:0.000454s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000577s ]
  8. SELECT * FROM `article` WHERE `id` = 459265 LIMIT 1 [ RunTime:0.001335s ]
  9. UPDATE `article` SET `lasttime` = 1775300382 WHERE `id` = 459265 [ RunTime:0.000954s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000237s ]
  11. SELECT * FROM `article` WHERE `id` < 459265 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000389s ]
  12. SELECT * FROM `article` WHERE `id` > 459265 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000399s ]
  13. SELECT * FROM `article` WHERE `id` < 459265 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001353s ]
  14. SELECT * FROM `article` WHERE `id` < 459265 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000862s ]
  15. SELECT * FROM `article` WHERE `id` < 459265 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000630s ]
0.085021s