Sub-topic 1, test-taking skills and precautions for multiple-choice questions
Pay attention to reading all the options in the multiple-choice questions. Various methods can be used to solve multiple-choice questions, such as direct method, special value method, exclusion method, verification method, graphic method, hypothesis method (that is, reduction to absurdity) and hands-on operation method (such as overlapping measurement method) often mentioned by geek math teacher Wu Xiaoping. Using exclusion method and substitution test method can save time.
We must carefully judge the correct number of several propositions. You think it's best to find counterexamples for those who are wrong. Common methods such as direct method, special value method, exclusion method, verification method, graphic method, hypothesis method (reduction to absurdity) and hands-on operation method (such as folding measurement method) can save time.
Step 2 fill in the blanks
(1) Pay attention to the situation of multiple solutions to one question.
(2) Pay attention to the implicit conditions of the topic, such as the quadratic coefficient is not 0, the integer in the actual problem, etc. ;
(3) Pay attention to whether there is a unit, and the expression format must be the final simplified result;
(4) When you can't find the angle and the length of the line segment, you can try to guess or measure.
Step 3 answer questions
(1) Pay attention to the standard answer, and write the standard for the process and conclusion;
(2) the calculation questions must be careful, and the final answer should be the simplest and absolutely correct;
(3) Simplify the problem before the evaluation, and simplify the complex. When substituting for evaluation, pay attention to: denominator is not zero; Appropriate consideration of skills, such as overall substitution;
(4) Solving fractional equations must be tested, and applied problems must also be tested;
(5) To solve the right triangle problem, pay attention to the method of explaining the auxiliary line and the steps of solving the problem. Pay attention to right angles and special angles. When taking approximate values, we must follow the requirements of the topic;
(6) practical application questions, long topics, and more questions. According to the meaning of the question, find out the exact relationship, column equation, inequality (group) or function relationship. Only by paying attention to the equal relationship between topics can we construct the equation, and the unequal relationship is to find the range of independent variables. After finding the solution of the equation, pay attention to the root test and remember the trade-offs.
(7) Probability problem: list all possible results by drawing a tree diagram, list or enumeration, and then calculate the probability;
(8) Scheme design topic: Look at the design requirements of the topic clearly, and consider the simplest scheme that meets the requirements when designing, regardless of the complicated and beautiful scheme.
(9) To find the second resolution function, we must check the first step before we can solve the second step (the first step can't be wrong, and the wrong step will be wasted).
Matters needing attention in mathematics answering 1. Carefully examine the questions and strive for "one-time completion"
After you get the test paper, you must first browse and understand the topic. First, look at the amount of questions, whether there is a printing problem; The second is to have a general understanding of the difficulty of the whole paper.
We should understand the meaning of the topic word by word, pay more attention to the similarities and differences of deja vu topics, and explore the implied conditions and their internal relations from multiple levels. Thoroughly understand the meaning of the problem, such as "two circles are tangent", including circumscribed and inscribed, both of which are indispensable.
The test questions in the senior high school entrance examination are from easy to difficult. Answering a few simple questions smoothly can double the confidence of candidates. Judging from the mathematics examination papers of the senior high school entrance examination in recent years, the examination time is very tight, and candidates have little time to check, so they need to answer questions carefully and accurately to strive for "one success".
2. Dare to "give up" temporarily when encountering difficulties.
Dare to "give up" temporarily when encountering difficulties, and don't waste too much time.
Generally speaking, for multiple-choice questions and fill-in-the-blank questions, the time for excellent candidates to answer each question is no more than 40 seconds, and the time for almost candidates is no more than 2 minutes. After solving the problem you can do, go back and concentrate on solving the problem. When answering questions, you should arrange your time reasonably, and don't fight a "protracted war" on a stuck problem.
3. Computer marking and writing should be neat.
Rolling writing should be fast, neat and accurate. Computer marking requires candidates to fill in the answer sheet accurately, with neat handwriting and clear steps for big questions.
The writing of the draft paper should be planned so as to be easy to retrieve. Many mistakes in calculation problems are due to poor handwriting. The correct way is to list the detailed steps on the answer sheet, and don't skip the steps. Only a few mathematical operations use draft paper.
Facts have proved that the speed of solving problems is fast if every step is completed in a down-to-earth manner; Do every question you can do correctly, and your exam score will be high.
4. Three ways to answer multiple-choice questions
There are three ways to answer multiple-choice questions.
Exclusion method: according to the question type and related knowledge, exclude obviously incorrect options.
Special value method: according to the conditions in the topic, select special values that meet the conditions or make special graphs for calculation and reasoning. When solving problems with special value method, we should pay attention to the selected values to meet the conditions.
Methods of speculation and measurement: direct observation or conclusion. This method is often used to explore the regularity in the senior high school entrance examination questions in recent years.