Skills of mathematical problems in college entrance examination;
Skills 1. Take a protractor into the examination room during the college entrance examination, because there must be some minor problems in solving geometry problems in the college entrance examination. At this time, you can measure it with a protractor, and then you can write the final conclusion. This is the simplest and most awesome math problem-solving skill in the college entrance examination.
Tip 2: In a math problem, you must first write a word! If the number of options is 4, usually the second largest option is the correct option. Looking at the options alone, there are generally more BD and less A. One more thing, don't change it after you choose it unless you are more than 90% sure. This experience can be regarded as the best mathematical puzzle solving skill in the history of college entrance examination.
Tip 3. Summarizing the experience of college entrance examination over the years, the first and last questions of college entrance examination mathematics are generally not A! The answers to the multiple-choice questions in the college entrance examination are evenly distributed! Fill in the blanks not only with 0 or 1! If the answer has a root sign, don't choose! The answer is 1, choose! When one is positive X and the other is negative X, choose one of these two! If the question looks simple, the answer is complicated, and vice versa! What to choose in the last question, what to choose in this question, three consecutive identical ones are not suitable for this article! When none of the above is practical, choose B!
Tip 4: If you can't choose math, remove the maximum and minimum and choose another one. The teacher told us! 80% of the college entrance examination questions are like this.
Tip 5, the derivative multiple-choice questions of transcendental functions can be replaced by constant functions that meet the conditions, but not linear functions. If there are too many conditions, kill by mirroring. Inequality is also a special numerical method and image method.
Methods of solving mathematical puzzles in college entrance examination;
Function method, this is to convert some calculations into functions, first bring in the answers, then shift the terms, turn one side of the equation into zero, and then you can roughly draw the expression of the function to see if there is a unique focus with zero, so that you can roughly judge the answers or find the answers closest to zero!
Empirical method: it is also used in sorting or conventional topics. First, for example, find the triangle area. Look at the answers A: 12, B: 13, C: 6, D: 1 1. First, 12, 13, 1 1 are obviously the wrong answers. Secondly, there must be a trap of forgetting to divide the triangle area by 2, so the correct rate of C's answer is high. There are some answers, and the first few are repeated, just like the picture below, so we won't just choose to repeat more answers! 1 2 There are two duplicate answers, and C and D are the most likely.
If, really can't find any method, then look at the answer, there are * * * common divisors generally have the correct answer. Generally, those answers will not have similar answers to the other three, but they are generally wrong. It can be ruled out directly, and finding the answer is actually finding the difference. Look through the author's thoughts, consider what trap the topic wants to set, and eliminate some irrelevant answers.