Statistics is basically a small problem, mainly the calculation of expected value, variance and standard deviation.

There are several typical types of derivative function problems, so just do a few more. Generally, it is to investigate the derivative operation and minimax and minimax calculation of a quadratic equation with one variable, and sometimes it will lead to application problems.

Mathematics needs methods, and I have a deep understanding. I'm not very good at math, but I can't find a few who are better than me in high school.

When I was in high school, a college entrance examination paper was handed in 30 minutes in advance. If there are no special circumstances, it is no problem to spend more 140. Now I'm trying to take some students with me. At first, it seems to be 60,70 (total score 150). After a month or two, it can generally reach 1 10~ 120. The trick is a method. How can I learn math well?

If you want to learn math well, it's actually very simple. It is enough to pay attention to the following points:

1, don't be afraid of math.

Many students seem to have a natural fear of mathematics. When they see mathematics, they naturally have a kind of resistance, which affects their normal thinking. Especially those application problems, some students didn't even see the problems. When they saw that the problem was so long, they dared not write it, thinking that they would not do it directly, wasting a good opportunity. I don't know, the application problem of mathematics is actually the so-called sub-problem, and there are few real difficulties. As long as you can read the questions carefully and write mathematical expressions, the score will be more than half completed.

In fact, in mathematics, most of them are changes, and all we really need to remember are a few formulas. We can treat him like a game. Mathematical formulas are weapons in our hands, and the topic is our enemies. Only each weapon has its own characteristics. Different enemies may have to change a variety of weapons. I don't think when playing games, you should run away when you see the enemy. It hasn't started yet. You're dead. How do you get through customs? That's why I call this website Game Mathematics. Think of mathematics as a game, just a game, what's the fuss! If we really hit a wall, we'll take another road. We are all maze experts. A little math problem just wants to scare us, is it possible?

Of course, if you really want to regard mathematics as a game, you need a solid foundation, that is, the basic knowledge of mathematics (in my website, this is very detailed). You are not advanced enough to beat a soldier. Why should you deal with that boss?

2. Pay attention to the skills of answering questions in the examination room.

Some students are particularly good at doing every problem wholeheartedly, but the problem is that he is seriously short of time. It took him almost an hour to choose the multiple-choice questions alone. Later, when he did a big problem, he clearly knew how to do it and believed that he could do it. Unfortunately, he was about to hand in his papers and had to give up reluctantly. Poor thing, why didn't you notice it at first?

First of all, when doing math problems in the examination room, especially the college entrance examination questions, we must pay attention to the answering skills. When you first get the test paper, don't do it directly (the general teacher won't let you answer it). Read the whole paper slowly (mainly the next few big questions) to see if there are any questions you have done, or if there are any questions you have seen, and if there are any questions you can finish quickly. After reading it, solve these problems first. Then do multiple-choice questions. The steps of doing the whole college entrance examination questions are as follows: done questions-multiple choice questions-big questions-fill in the blanks. Why put the fill-in-the-blank question at the end? Because the score of the fill-in-the-blank question is very small, it is not much different from the calculation question, and it takes a lot of thought. Unlike multiple-choice questions, it can guess the answer, so it is usually put at the end.

Secondly, when you do the exam questions, you must pay attention to getting points. In other words, it's all about grades. It doesn't matter if the topic can't be done, it will do in a few minutes. Therefore, when doing problems, especially when doing the later calculation problems, we should pay attention to the skills of getting points. The first thing to pay attention to is the problem-solving format. Because the college entrance examination is graded step by step, no matter whether you can do that topic or not, at least you should have a process of doing it, and then write a mathematical formula (if you can't write a mathematical formula, it is no problem to write at least an expression in Chinese). As for the calculation, if it really doesn't work, forget it. Don't waste too much time here, there are still many problems waiting for you!

3. Pay attention to problem-solving skills

The problem-solving skills mentioned here are mainly aimed at multiple-choice questions and fill-in-the-blank questions. This kind of question only needs an answer, and no method is required. When we do it, there is no need to do it honestly, just like doing a calculation problem. As long as you can get the answer, even if you guess, no one can control you. So the main point of this kind of topic is one: guess! Once I watched it with students and found several college entrance examination papers. In this way, at least 50 points in each set of papers are not counted.