First of all, we should carefully examine the questions. When doing a problem, the taboo is not to look at the problem carefully and not to work hard. As a result, not only a lot of time is wasted, but sometimes wrong choices are made, resulting in half the effort. Therefore, we must read through the questions and quickly think of concepts, formulas, theorems and problems that should be paid attention to in knowledge points. To explore the implied conditions in the topic, we should discard the false and retain the true, and understand the true meaning of the topic.
Secondly, we should pay attention to solving problems. In addition to solving problems directly according to ideas, we should also pay attention to some special methods, such as special value method, substitution method, exclusion method, verification method, combination of numbers and shapes and so on.
Direct method. Some multiple-choice questions are adapted from some fill-in-the-blank questions, judgment questions and analytical questions, so they can often be solved step by step by using direct methods, starting directly from concepts, formulas, theorems and properties. Most of us will use this method when solving problems.
Exclusion method. Because the answer to multiple-choice questions is one of the four options, there must be only one correct answer, so we can use the exclusion method to exclude the answer that is easy to judge as wrong from the four options, so the remaining one is naturally the correct answer.
Verification method. Through the observation and analysis of the selected branches, each selected branch is substituted into the trunk one by one for verification, or a special value is appropriately selected for verification, or other verification means are adopted to judge whether the selected branches are right or wrong.
Special value method. Some multiple-choice questions are difficult to solve by conventional methods. It is often very simple to choose some special cases for analysis, or to choose some special values for calculation, or to change the general form into a special form with specific values instead of letter parameters, and then to judge.
Combination of numbers and shapes. Also called mirror image method. Some multiple-choice questions are complicated to solve by algebraic method, but if we can make a sketch according to the meaning of the question, we can get the answer of multiple-choice questions according to the shape, position, nature and comprehensive characteristics of the figure.
There are many ways to solve multiple-choice questions, but don't stick to fixed thinking when doing them. Sometimes a question can have many special uses.
Also, in the process of making multiple-choice questions, you can use a pen to mark keywords to attract your attention, such as at least, no, at most one and so on. Mark the questions you didn't do the first time, but be careful to distinguish them from other marks, so that they are not easy to miss.
Finally, after finishing the questions, carefully check whether there are any omissions or mistakes, and do it again in a comprehensive and serious way. You can verify the answers in different ways. Besides, if you really can't do it, don't do it in vain. Be sure to choose an answer.