论文部分内容阅读
在高考中,数学选择题所占分值较大,因此能否准确快捷地解答选择题.直接关系着高考数学能否取得好成绩.数学选择题的求解,一般有两种思路:一是从题干出发,探求结果;二是题干和选择支联合考虑.或以选择支为出发点探求是否满足题干的条件.解题的基本原则是“小题不能大做”.解题的基本策略是:要充分利用题设和选择支两方面提供的信息来判断.能做定性判定的,就不使用复杂的定量计算;能使用特值判定的,就不使用常规解法;对于明显可以否定的选择支.应及早排除,以缩小选择的范围.
In the college entrance examination, mathematics multiple-choice questions account for a large number of points, so whether to answer multiple-choice questions quickly and accurately. Is directly related to whether the college entrance examination mathematics can achieve good results. Mathematical multiple-choice questions, there are generally two ideas: First, from Starting from the stem and searching for results; secondly, considering the stem and the choice branch jointly, or selecting the branch as the starting point to search for the conditions for satisfying the stem. The basic principle of the problem is that “small questions cannot be made large”. The basic strategy is: to make full use of the information provided by the questions and the selection of branches to judge. Can make qualitative judgments, do not use complex quantitative calculations; can use the special value to determine, do not use conventional solutions; for obvious Negative selections should be excluded as soon as possible to narrow the choice.