How to learn math well, help!!

High school? Junior high school? In fact, mathematics is very easy to learn, the key is to do problems, and it is very important to listen to what the teacher has to say in class!

Nothing in junior high school Geometry Algebra Geometry is basically a universal way to do auxiliary lines It depends on the accumulation of experience, and if you do more questions, you will naturally be able to make lines very well Algebra You have to rely on your own understanding to do it Anyway, the exam will never be inseparable from what the teacher talks about High school is more troublesome Vectors must be understood well Reality tells me that high school geometry can basically be solved by vectors High school geometry is basically inseparable from coordinates This place must be understood If you don't understand, ask immediately Algebra is nothing special It is still recommended to do more questions in the classroom Everything else is a lie Combined with the understanding of the class to do better Of course, learning mathematics still depends on interest I am very partial Mathematics is very good But English is poor because I like mathematics When you really like mathematics You will feel that time flies quickly after reading a book for a few hours Slowly build up interest When you understand a knowledge point, make a question that you can understand by yourself It feels really good Study hard Of course, don't be biased Otherwise, it won't be cost-effective to take the college entrance examination like me.

In general, do not lose points for low-grade questions, lose less points for mid-range questions, and score points for deep problems, and then add up to high scores.

Elaboration: Multiple choice questions are generally easy, if you encounter a ball of spatial geometry, it will be troublesome, you should practice more to ensure 50 or 55 points.

Fill-in-the-blank questions should be calculated carefully, especially the 16 questions are very troublesome, and more and less will be full marks.

To solve the problem, do a few model questions: The trigonometric functions of the 17 questions are generally the distribution columns of probability and solid geometry. And the second question of solid geometry is mostly to find dihedral angles or line plane angles, and the first question is simple to prove that lines and planes are parallel, or planes are parallel to analytic geometry problems, derivatives, and number series problems.

Analytic geometry pays more attention to the general method, and the derivative pays attention to drawing the inverse function image first, and then reducing the original function image. The number series is mostly in the last question, the first question is simple, and the second question is generally combined with expressions, which is difficult to guess. I guessed that I didn't guess the specific knowledge points this year. Depressed.

The day is closed. Nissin Hidazin.

Minute. The slowest is 18 minutes and the fastest minute.

Solution: If there are x boys in the waiting area, then there are (38-x) girls, according to the question: x+5=2

3 (38-x) 4 + 3, solution: x = 22, girls have 38-x = 38-22 = 16 (name), answer: There were 22 boys and 16 girls in the waiting area

1) Because each type A mask is profitable, the production of type A masks can be profitable.

Since a total of 50,000 pieces are produced, the number of B types is (5-x). A single Type B mask is profitable, so the production of Type B masks is profitable.

2) In the first question, the sum of the 2 equations is the total profit, i.e. y=

The question stem requires that a must not be less than 10,000, so. And even if all 8 days are all produced only A, it can only be produced. So a.

3) Question 1. Use the formula in question (2): y= and. So question 2. Let the total time required be t, t=x =5x 12+ and.

So when x=, t takes the least value, that is, the least time. At this time, the production a is 10,000, 10,000 (i.e. hope my answer, you can!) If so, please give a bounty!

If the unit price of the third prize is x, the unit price of the second prize is 2x, and the first prize is 4x

0<12x+12x+24x 200 Solution 0 There are 4 schemes, and the maximum scheme requires 192 yuan.

Solution: The unit price of the first prize is 4x yuan, the unit price of the second prize is 2x yuan, and the unit price of the third prize is x yuan.

3（4x）+6（2x）+24x≤200

12x+12x+24x≤200

48x≤200

x≤25/6

2x≤25/3

4x≤50/3

The purchase plan is selected from the items listed in the table below, and the unit price of the items is sent to you.

The maximum cost is 16 yuan per unit of the first prize.

The unit price of the second prize is 8 yuan.

The unit price of the third prize is 4 yuan.

Total cost = 48 + 48 + 96 = 192

If it is an integer, there are 4 kinds. Up to $192.

1. You can find out by weighing at least 2 times; It takes up to 6 times to find out.

The steps are as follows: 1) Take out 1 bottle of water and put it aside, and divide the remaining 8 bottles into 2 parts (4 bottles per portion), weigh the quality of these two parts respectively, if the quality is the same, then it means that these two parts are water, so the original 1 bottle is salt water;

2) If the quality of the two parts weighed is not the same, then the brine must be in the one with the higher quality. Similarly, divide the 4 bottles of water with large quality into two parts, each serving is 2 bottles, and weigh them separately. The brine is in the high quality portion.

3) Take the large part (2 bottles) and weigh them separately, and the one with the largest quality is the salt water.

Solution: (1) Bird burial.

2) - (1/6) - (1/4) - (1/3) - (1/2) = -1 6+1 4-1 3+1 2=1 4

4) (-4 and 1/4) - (5 and 1/3) - (4 and 1/4) = -4 and 4 points of 1-5 and 1/3 of the reputation of the year + 1/4 and 1/4 = -5 and 1/3

List the equation according to the meaning of the middle paragraph and calculate:

1) An additive is , and is, find another additive.

Solution: 2) -The difference between the opposite of the absolute value of 1/3 and the opposite of 2/3.

Solution:-(1 3 )-2 3)]=1 3+2 3=1 3 If you don't understand, you can ask

Solution: (1).

2)-(1/6)-(1/4)-(1/3)-(1/2)=-1 6+1 4-1 3+1 2=1 4

4) (-4 and 1/4) - (5 and 1/3) - (4 and 1/4) = -4 and 1/4 - 5 and 3/3 of the land + 4 and 1/4 = -5 and 1/3

List the equation according to the title and calculate:

1) An additive is , and is, find another additive.

Solution: 2) -The difference between the opposite of the absolute value of 1/3 and the opposite of 2/3.

Solution:-(1 Jane3 )-2 3)]=1 3+2 3=1 3

This is going to be counted month by month!

There are x people in the second grade, a first-year person, and a third-year person.

then x+x=50

So 50 in the second grade, 75 in the first grade, and 225 in the third grade.

First grade: 75 students.

Second grade: 50 students.

Third grade: 225 students.

If there are x people in the second grade, then there are people in the first grade, and there are people in the third grade, and the equation is equation:

x+, the solution gets: x=50 (person), person), person).

Second grade x people.

x=50 2nd grade 3rd grade 75 3=225

If there are x people in the second grade, there will be people in the first grade and there will be people in the third grade. x+ people. x=50。There are 75 students in the first grade. There are 50 students in the second grade. There are 225 students in the third grade.

There are x people in the first grade.

x+x=54 and 11 6

1+ times (7 times the number of students in the second grade of the three grades) is 350 7 = 50 in the second grade, 75 in the first grade, and 225 in the third grade.