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技巧解读数学选择题的解题本质就是去伪存真,舍弃不符合题目要求的选项,找到符合题意的正确结论.筛选法(又叫排除法)是解答选择题的一种常用方法,使用筛选法的前提条件是答案唯一.筛选法是根据题设条件,结合选项,通过观察、比较、猜想推理和计算进行排查,从四个选项中将不正确的答案一一淘汰,最后得出正确答案的方法,特别对用由因导果法解答较困难而答案又模棱两可者更有用.
Interpretation of the skills of mathematical interpretation of the problem of choice is the essence of falsehood, give up the options that do not meet the requirements of the title, to find the correct conclusion in line with the questions.Screening method (also known as exclusion method) is a commonly used method to answer multiple-choice questions, the use of screening method Prerequisites are the only answer.The screening method is based on the conditions set, combined with options, through observation, comparison, guesswork and calculation to investigate, from the four options will be incorrect answers one by one eliminated, the final solution to the correct answer In particular, it is more useful to answer the ambiguous answer again, which is more difficult to answer by the result-based method.