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考公题型7——资料分析速算技巧,放缩

  • 2026-04-28 20:13:43
考公题型7——资料分析速算技巧,放缩
所谓放缩，就是做除法的时候一种快速而精确的估算方法，放缩的优点是精准而优雅，不需要再去考虑选项差距过小而导致的误差。
1.学会正确的处理位数
我们在放缩之前，一定要处理好位数关系，因为我们不希望放缩的时候带小数点，或者因为位数的原因影响最后的结果。
2.放缩的思路
假设分母和分子之间是比例关系，那么分子分母同时加减一个数字和它对应比例的倍数，那么原=后，通过放缩的形式，我们可把复杂的分式，简化他的分母或者分子
例题：
首先我们需要取消位数，不把小数点给拉进来计算，所以分子截一下留673。然后分母取消小数位数，得到10700，然后我式子里面为什么10700后面的两个0也去掉，这样可以快速估计出673是107的6.5倍，如果用10700来算，我们就很难快速判断出10700是673的多少倍。所以这里无论截取多少位数，我们都需要保证截取到最后，你能把握住最后的比例关系即可。也就是截取一定是发生在缩放之前！！！
分子分母之间大约是6.5倍，这里我们先取6倍，然后分子多加一点，最后计算得到的答案是63开头的选项。
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  1. CONNECT:[ UseTime:0.000852s ] mysql:host=127.0.0.1;port=3306;dbname=d_sjds;charset=utf8mb4
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  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000501s ]
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  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000961s ]
  6. SELECT * FROM `set` [ RunTime:0.000418s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001262s ]
  8. SELECT * FROM `article` WHERE `id` = 459887 LIMIT 1 [ RunTime:0.001772s ]
  9. UPDATE `article` SET `lasttime` = 1777443182 WHERE `id` = 459887 [ RunTime:0.006910s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000542s ]
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