Do you memorize math concepts in the first year of junior high school? What are the math formulas th

This may not be obvious in the usual calculation problems, but it will be helpful when it comes to true/false problems. Besides, there are not many concepts in the first year, so I will remember them all with a little effort.

You don't have to memorize it at all, you just need to be able to do math problems and apply them, and those boring concepts are useless. I never memorize concepts, and I still get full marks on exams.

As for the back, a concept is the foundation. Although the exam will not be taken. But it will be of great help to you in solving the problem, as well as categorizing your body type. But it is still necessary to focus on the topic.

You don't need to memorize it word for word, but there are a few important elements of each concept that must be remembered!

It's best to carry it on your back, but it's okay not to carry it. However, it is essential to understand and remember the key points, and to consolidate the questions.

I don't seem to memorize it, but you can do some questions, and it will be solidified. In addition, the first year of junior high school is a review of primary school, and generally in the second year of junior high school, you may have to memorize some proof questions, otherwise it is not easy to write a certificate, but it doesn't matter, you usually remember it after doing it a few times.

It must be memorized to lay the foundation for the future.

You can memorize in another way--- understand and memorize, specifically look at the concept once, recall it repeatedly when doing the problem, then compare the concept, understand the concept, and then you will remember, (try it, effectively remember to thank you.)

I'm a math teacher, and the theorems and axioms in the book must be memorized, and the concepts just need to be understood.

The area of the triangle is 2 at the base. Formula s= a h 2 Area of a square Side length Side length Formula s= a A Area of a rectangle Length Width Formula s= a b

Area of the parallelogram Bottom Height Formula s= a h Area of the trapezoid (upper bottom + lower bottom) Height 2 Formula s=(a+b)h 2 Sum of internal angles: The sum of the internal angles of the triangle is 180 degrees.

The volume of the box Length, Width, Height, Formula: v=abhFormulas in arithmetic1. Addition commutative law: the position of two numbers is added and the sum is unchanged.

2. Addition associative law: add three numbers, first add the first two numbers, or add the last two numbers first, and then add with the third number, and the sum is unchanged.

3. Multiplication commutative law: multiply two numbers, and the position of the exchange factor remains unchanged.

4. Multiplication associative law: multiply three numbers, first multiply the first two numbers, or multiply the last two numbers first, and then multiply them with the third number macro, and their product remains unchanged.

5. Multiplication distribution law: multiply two numbers by the same number, you can multiply the two additive numbers with this number respectively, and then add the two products, and the result remains unchanged.

The formulas to memorize in the first year of junior high school mathematics are introduced as follows:1. Square:

Circumference = side length 4 c=4a;

Area = Side Length Side Length S=a a.

2. Cube:

Surface area = edge length Edge length 6 s table = a a 6;

Volume = edge length edge length edge length v=a a a.

3. Rectangle:

Circumference = (length + width) 2 c = 2 (a + b);

Area=Length=Widths=ab.

4. Cuboid:

surface area (length and width + length and height + width and height) 2 s=2 (ab+ah+bh);

Volume = length width height v=abh.

Important theorems in mathematics in the first year of junior high school.

1. The bisector of the top angle of the isosceles triangle bisects the bottom edge and is perpendicular to the bottom edge.

2. The bisector of the top angle of the isosceles triangle, the middle line on the bottom edge and the height on the bottom edge coincide with each other.

3. The angles of an equilateral triangle are equal, and each angle is equal to 60°.

4. Determination theorem of isosceles triangle If a triangle has two equal angles, then the sides opposite these two angles are also equal (equigonal to equilateral).

5. A triangle with three equal angles is an equilateral triangle.

6. There is an isosceles triangle with an angle equal to 60°, and the angle is equilateral.

7. In a right-angled triangle, if an acute angle is equal to 30°, then the right-angled side it is facing is equal to half of the hypotenuse.

8. The middle line on the hypotenuse of a right triangle is equal to half of the hypotenuse.

Want. Mathematics also requires understanding concepts. It's not about rote memorization, it's about understanding the concepts of mathematics. That's how you can learn math well.

How to learn math well.

Attention to detail in knowledge.

Let's start with a simple example: for students who are new to negative numbers, many of them will think that -a is a negative number, but in fact "-" can have three meanings, minus, minus, and opposite. The "-a" here is nothing but the opposite of the "a".

Another example is to ask some students the question of the chain: When is the value of zero? It is generally said that x=0 is often overlooked.

Carefully explore concepts and formulas.

Many students do not pay enough attention to concepts and formulas, and this kind of problem is reflected in three aspects: First, the understanding of concepts only stays on the surface of words, and does not pay enough attention to the special circumstances of concepts. For example, in the concept of algebraic expressions (formulas expressed in letters or numbers are algebraic formulas), many students ignore that "individual letters or numbers are also algebraic formulas".

The second is the blind rote memorization of concepts and formulas, and the lack of broad connection with practical topics. In this way, it is not possible to connect the knowledge points learned with the problem solving.

Pay attention to the derivation process.

The derivation process here mainly refers to being able to deduce other concepts according to the most basic concepts in the textbook, so that after their own derivation, they can have a deeper understanding of concepts or theorems or derivation formulas, and then only need to remember the most basic concepts, and other theorems can be simply deduced by themselves, so that you will be more familiar with all the theorems when you memorize them, and if you forget some theorems during the exam, you can deduce them too quickly.

I hope you can help you.

I think so. If you want to improve yourself, you can learn, and if you don't have a good foundation, it is recommended to make up the foundation first.

Of course, you have to learn, the concept is very important, and if you don't learn the concept well, the foundation will be poor.

Yes, if you don't even understand the most basic concepts in 7th grade mathematics, will you not be able to learn it? - Mathematics for academic excellence.

November 5, 2018If you understand the formulas and concepts, junior high school mathematics is not difficult In fact, there is a big difference between junior high school mathematics and primary school mathematics, and primary school mathematics is more intuitive.

Personally, I think it's needed because:

1. The memorization of concepts is conducive to making accurate conceptual judgments in the face of similar problems, because the difference between one word has different methods and results for solving problems;

2. Recite the concept first, in order to gradually understand, if you can't remember, the comprehension speed may be slower;

3. The accumulation of memorization of junior high school mathematics concepts plays a great role in laying the foundation for junior high school and high school mathematics.