Problems in science studies, learning about science problems

Mathematics is a continuous thing, and it is necessary to make up for the previous ones. Set goals for yourself, such as advancing one place in each monthly exam, etc., and you will always succeed, as long as you really work hard. There is no need to worry about you, the college entrance examination is a competition with people in the whole province, not the whole class.

As long as you improve every time, it's fine. Self-encouragement is necessary, which boosts confidence. Don't go to bed too late, lack of sleep is more than worth the cost.

When I was in high school, I went to bed at 11:30, at 12 at the latest, got up at 6:30, and took a nap for an hour, and my grades were okay, and I read 211Now that I've graduated, I hope I can help you. It depends on what you're aiming for.

If you can get 120 in general mathematics, 211 is still no problem. A year and a half is enough for you to catch up with math. In fact, it is not as difficult as you think, the main thing is the learning method and efficiency, it is recommended that you consult your school's senior math teacher.

After all, they are the ones who are professionals, and they can at least provide you with an idea. After all, everyone's learning method is different.

Don't just think about geometry problems, the best way is to draw a stroke.

The amount of questions in science is very important, but you can't do it by death. It is necessary to pay attention to the question type of each knowledge point and the synthesis of several knowledge points.

Putting it simple and then difficult is the most helpful way to boost confidence.

Don't do just one type of question, and don't just do the type of question you can do...

Summary. To learn science classes well, we must learn science classes well, and classroom learning is the core. In the classroom, students should do "three diligences":

Use your brain, your mouth, and your hands. Use your brain. Think proactively in class and think about the questions asked by the teacher.

Pay attention to what the teacher says, what problems you want to explain, and what the reasons are, and actively participate in teaching activities. Move your mouth frequently. Raise your hand to the teacher's questions and ask the teacher more questions.

If the student is too shy, you can also ask the question in the homework book that the teacher gives to you every day. Be hands-on. This manifests itself in two ways:

First, the teacher's knowledge expansion and some typical example questions, it is best to write them down in time. The second is to be diligent in the experimental class, which can not only cultivate hands-on ability and familiarize yourself with skills, but also find your own shortcomings in experimental analysis or design in the hands-on class, and deepen your understanding of the experiment. "Unlike other subjects, science is a synthesis of four disciplines, and its life, application, and practice are very strong.

Therefore, students must have a wide range of knowledge and interests. ”

Good. Hello, it is a pleasure to answer your questions about learning scienceWe are swinging, if a person stands on the autumn seepage Li Qian does not move, the movement of the swing is similar to the movement of a single circle and a virtual pendulum. When the swing swings from the lowest point to the highest point, gravity does negative work, and the kinetic energy of the system is converted into the potential energy of the system.

In the classroom, respecting Hu Sheng should achieve the "three diligences": diligent use of the brain, diligent use of the mouth and diligent hands. Use your brain.

Think proactively in class and think about the questions asked by the teacher. Pay attention to what the teacher says, what problems you want to explain, and what the reasons are, and actively participate in teaching activities. Move your mouth frequently.

Raise your hand to the teacher's questions and ask the teacher more questions. If the student is too shy, you can also ask the question in the homework book that the teacher gives to you every day. Be hands-on.

This is manifested in two aspects: one is the knowledge expansion and some typical example problems taught by the teacher, and it is best to write them down in time. The second is to be diligent in the experimental class, which can not only cultivate hands-on ability and familiarize yourself with skills, but also find your own shortcomings in experimental analysis or design in the hands-on class, and deepen your understanding of the experiment.

"Different from other subjects, science is a synthesis of four disciplines, and its life, use of bright sources, and practice are very strong. Therefore, students must have a wide range of knowledge and interests. ”

You're only a freshman in high school, you can, you can.

There are a lot of students like you among the students I teach, and some of them have raised it. It's because they did it: insisting on diligence and doing it right.

Science learning methods: 1. Reading books, this is the premise. It is necessary to read the textbook thoroughly to understand how the theorems, laws, and formulas in it come about, and especially to memorize the key points of the teacher's lectures.

2. Practice, that's the point. First of all, I recommend buying good materials, understanding the example questions, and then doing the following homework one by one from easy to difficult, and making each answer clear. (Don't mess up the information, just finish a good information from beginning to end, do as much as you can on your basis, but you must do it by hand, you must do more.)

3. Associative induction, it is also necessary to prepare a notebook for science and copy the important formula knowledge points; Cut out the classic questions from the materials and paste them; Copy the questions you did wrong; Compare the same and similar formulas and knowledge points to distinguish their differences and commonalities.

Final advice: persistence is paramount, and a diligent approach is essential.

What are you going to take? If you have 2 books, it's enough to do regular exercises, and if you have 1 book, it is recommended not to choose science, choose liberal arts, more advanced Fudan and the like, or even Tsinghua University and Peking University, then it depends on your rp, maybe one day you will succeed.

Do more questions, sister, I'm in my third year of high school, and my first year of high school is similar to you, but after doing more questions, I will be proficient, and now there is nothing that I can't do.

One grasps the concept, the second grasps the foundation, the third grasps the problem, the fourth grasps the thinking, and the fifth grasps the reflection.

1: Let the hundred digits be a, the ten digits be b, and the single digits be c

b-a=3 b=4a-3 c=3a-1

a=2 b=5 c=7

Answer: 257

2: Let the side length of the square be x.

3x=(x-3)x4

x = 12 Answer: 12

4: Let the number of days be x and the number of parts be y.

240x=y-400

280x=y+200

x=5y=1200

Answer: The number of days is 5 and the number of parts is 1200

5: Let the distance be a common multiple of A and B 48.

A completes 3 per hour and B completes 2 per hour

B has completed a distance of 2x5=10.

48 of 5 8 is 30 miles away.

There are 20 journeys left, and A and B will be completed together.

Answer: It takes 4 hours to complete.

6: Let the speed of B be x and the speed of A be y and the distance of z will be.

2/3 x =z

z-y)*（2/3）=6

Relation 3: If A goes ahead with 1 1 2, then B can catch up with A with 1h. I don't understand this sentence.

After asking you what the teacher means, you can make a list of formulas to explain.

Answer: The data in the question is wrong and needs to be corrected.

7：x:y:z=42：80：108

9：a=14 b=2

10：m=3 n=2

11: b=7

13: A is not equal to 0 and A is not equal to 3

31:m=

32: Set the original x balls in box A and the original y balls in box B.

Then there is: y+10=(x-10)*6

y-10=(x+10)*3+10

Solution: x=40, y=70

33:x=3,y=1

34:6cm

38: Since the sum of the outer angles of the polygon is 360°, the sum of the inner angles of the polygon is 360°*Let the polygon be n-sided, then.

n-2)*180°=900°

The solution is n=7, and the polygon is heptagon.

39: Looks like there's something wrong with the title.

40: Proof: by the question, there is.

a+b=90° 180°-b=4a

The solution is a=30°, b=60°

Therefore a = 1 2 b

41: Incorrect. Since the opposite sides of the apex must be in the same straight line, the conditions given in the question are obviously incorrect.

ps: I'm a top student, hehe. Be sure to give the bounty!

.5x-y=10

32, A 40 B 170

33、x=3 y=-1

km/h 4km/h

38. a heptagon.

39, I don't know what LZ asked.

40, angle a=30 angle b=60, can get a=1 2b41, incorrect, such as a straight line perpendicular, two adjacent angles are equal but not to the top angle.

30: (x/2) -y=10

31: m=1/2

32, A 40 B 170

33: x=3 y=-1

34: The circumference is 6

35: Hydrostatic velocity 16 Water velocity 4

37: The question seems to be problematic. The sum of the inner angles of the triangle is equal to 18039: the question is wrong, huh?

If x squared - 3x = 0 gives x = 0 or 3, then 2x cubic - 11x-8 = 0 or 13

40: Proof : a+b=90, 4a=180-ba=30, b=60

Therefore a=1 2b

41: Incorrect.

In addition to the fact that the vertices are the same and the two angles are equal, the two angles must also be two angles formed by the intersection of two straight lines.

The little kid doesn't study hard, so he takes this kind of question out and gives points.

Almost all the time reviewing ......

Don't put too much pressure on yourself. You didn't study, and your classmates didn't necessarily study.

During the revision process, you need to understand what you will do. What else won't ......

The problem exists, and there are more than one or two, however, if you solve one, there will be one less!

Mathematics: High school mathematics knowledge is very systematic, and it is divided into several major parts, such as sets, functions, plane sets, solid geometry, curves, etc., and mathematics review should be systematic.

English: Pay attention to the accumulation of words and the practice of listening. Then there is the question-based review, which selects the vocabulary, phrases, and grammar in a single selection; Essay reading, composition. Write more essays and pay attention to the application of good long sentences.

Physical Chemistry: Similar to mathematics, pay attention to the systematization of review, summarize more and think more. Especially some of the classic question types. For example: "Mechanics, kinematics, electric and magnetic fields, and pay attention to the type of experimental questions."

Liberal Arts: This can't help you, I'm a science major, and my understanding of liberal arts is memorization! Hehe.

The third year of high school is hard, but it is also very short. Especially when you're ...... into it

Same situation as I did back then.

I later summarized the main points:

1. The basic knowledge is not solid (this is the main reason), if you can skillfully write out the knowledge points of physics, chemistry, biology and other basic sciences on a blank paper, and can accurately say the connection between them, this point will be solved.

2. Passively accept knowledge, the teacher explains, you can understand, but you can't solve the problem independently, which means that you don't understand at all, but you are too passive to accept and have not formed your own understanding. It is recommended that you grasp the basic knowledge and try to do the exercises independently and completely.

3. The knowledge that has been learned has not been digested and formed into a system, which cannot be solved in the short term. My experience is: find a way to get the PPT of the teacher's lecture, and then review it systematically by yourself.

4. If you can't use the tactics of the sea of questions, it will only make you more short of time.

To sum it up, the basics are still not solid enough, whether you admit it or not, this is the truth. If you feel that the foundation is very solid, please follow the first point.

I took the college entrance examination in 05, I did very poorly in the first year, I repeated it for a year, and my total score increased by 130 points in 06, and I am now studying in graduate school. I think these will be of some use to you, don't rush it. I wish you success.

It is recommended that you first sort out your own learning ideas, don't blindly memorize, formulas and theorems are for you to use flexibly. The topic is not something that the teacher will talk about, but you will be able to do it yourself, and if you try to do it yourself, it must be easier to remember than after the teacher finishes speaking.

It is best to understand the question in relation to reality.

Don't ask for long, but ask for understanding, you may not understand it thoroughly.

Pay attention to the summary, the starting point of each question. You will find that the test centers that are commonly tested are those.

Every day, you should prepare what the teacher will talk about the next day, study no more than 11:30 in the evening, and use the usual scattered time to consolidate, formula, grammar, etc.

Kiss. Now, now that you have chosen science, you can't dwell on it anymore, it's pointless.

Mathematics will not make use of formulas, indicating that the understanding of formulas is not enough, the best way is to deduce it yourself, all kinds of variants and all kinds of ** to figure out, especially trigonometry, derivation can form a knowledge system, more helpful to memory. As for the number series, the focus is on the method, and the method in the mind should be approximate, and there is that the most primitive knowledge points, summation formulas, and recursive formulas must be remembered that this is the most fundamental.

What about physics, the method is more careful, first of all, you have to overwhelm it in momentum, you can't be afraid of him, don't panic, otherwise you can't do what you can do. It's best to talk to your teacher.

The organic calculation of chemistry is indeed very annoying, but the method remains the same, just a few, the typical example problems taught by the teacher, put it in.