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【考公笔记】资料分析(1):截位直除

  • 2026-09-21 19:42:06
【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:0.000623s ] mysql:host=172.18.0.4;port=3306;dbname=d_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000938s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000433s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000361s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000562s ]
  6. SELECT * FROM `set` [ RunTime:0.000267s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000682s ]
  8. SELECT * FROM `article` WHERE `id` = 459265 LIMIT 1 [ RunTime:0.000408s ]
  9. UPDATE `article` SET `lasttime` = 1789993568 WHERE `id` = 459265 [ RunTime:0.001209s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000353s ]
  11. SELECT * FROM `article` WHERE `id` < 459265 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000475s ]
  12. SELECT * FROM `article` WHERE `id` > 459265 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000375s ]
  13. SELECT * FROM `article` WHERE `id` < 459265 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000633s ]
  14. SELECT * FROM `article` WHERE `id` < 459265 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000495s ]
  15. SELECT * FROM `article` WHERE `id` < 459265 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000597s ]
0.080380s