高考数学压轴大题答题技巧【二】

2019-07-04 15:37  点击次数: 次   作者:admin

第三重要心态:重视审题。
 
你的心态就是珍惜题目中给你的条件。数学题目中的条件都是不多也不少的,一道给出的题目,不会有用不到的条件,而另一方面,你要相信给出的条件一定是可以做到正确答案的。所以,解题时,一切都必须从题目条件出发,只有这样,一切才都有可能。
 
在数学家波利亚的四个解题步骤中,第一步审题格外重要,审题步骤中,又有这样一个技巧:当你对整道题目没有思路时,步骤(1)将题目条件推导出“新条件”,步骤(2)将题目结论推导到“新结论”,步骤(1)就是不要理会题目中你不理解的部分,只要你根据题目条件把能做的先做出来,能推导的先推导出来,从而得到“新条件”。步骤(2)就是想要得到题目的结论,我需要先得到什么结论,这就是所谓的“新结论”。然后在“新条件”与“新结论”之间再寻找关系。一道难题,难就难在题目条件与结论的关系难以建立,而你自己推出的“新条件”与“新结论”之间的关系往往比原题更容易建立,这也意味着解出题目的可能性也就越大!
 
最高境界就是任何一道题目,在你心中没有难易之分,心中只有根据题目条件推出新条件,一直推到最终的结论。解题心态也应当是宠辱不惊,不以题目易而喜,不以题目难而悲,平常心解题。
 
最后还有一点要提醒的是,虽然我们认为最后一题有相当分值的易得分部分,但是毕竟已是整场考试的最后阶段,强弩之末势不能穿鲁缟,疲劳不可避免,因此所有同学在做最后一题时,都要格外小心谨慎,避免易得分部分因为疲劳出错,导致失分的遗憾结果出现
 
 
 
Third important mentality: attach importance to examining topics.
 
Your mentality is to cherish the conditions given to you in the title. There are many and many conditions in math problems. If you give a question, it won't be useless. On the other hand, you must believe that the given conditions can certainly achieve the correct answer. Therefore, when solving a problem, everything must start from the condition of the topic. Only in this way can everything be possible.
 
Among the four solving steps of the mathematician Polia, the first step is particularly important. In the examination step, there is another skill: when you have no idea about the whole question, step (1) deduces the condition of the topic into "new condition", step (2) deduces the conclusion of the topic into "new conclusion", step (1) ignores the topic. The part you don't understand, as long as you can do it first according to the conditions of the topic, you can deduce it first, so as to get the "new conditions". Step (2) is to get the conclusion of the topic. What conclusion do I need to get first? This is called "new conclusion". Then the relationship between "new conditions" and "new conclusions" can be found. A difficult problem is that it is difficult to establish the relationship between the condition of the topic and the conclusion, and the relationship between the new condition and the conclusion that you put forward by yourself is often easier to establish than the original one, which also means that the possibility of solving the problem is greater.
 
The highest realm is any topic. There is no difficulty in your mind. In your mind, only new conditions are introduced according to the conditions of the topic, until the final conclusion is reached. The mentality of solving problems should also be spoiled and humiliated, not delighted by the ease of the topic, not sad by the difficulty of the topic, and solve problems with an ordinary mind.
 
Last but not least, although we think that the last question has a fairly high score, it is the final stage of the whole exam, and fatigue is unavoidable. Therefore, all students should be very careful when doing the last question to avoid some of the reasons for easy score. For fatigue errors, resulting in the loss of points unfortunate results.
 
 


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