What math knowledge points do you remember?

The math I remember was all about those impressive formulas.

For example, odd and even are unchanged, symbols look at quadrants, the Pythagorean theorem in junior high school, and the parallel conditions in high school.

The most forgiving thing is the logical judgment: all, there and only, not all, most, included, etc., and I am deeply impressed by the difficulty of holding on to the logic if I don't go around you.

The only thing I remember now is the Pythagorean law.

In a right-angled triangle, the squares of the lengths of the right-angled sides are added together to equal the squares of the length of the hypotenuse... I did very well in high school math, but when I was working recently, I came across a calculus symbol and suddenly found that I couldn't read it.

Then I think about it, I almost only remember the Pythagorean law...

From elementary school to high school, I studied mathematics for 11 years, and now I have been away from school for 7 years, and I have almost forgotten a lot of mathematics knowledge points, and now I can only remember a little bit when I try to recall it. For example, if two planes are parallel, then the straight line in one plane is parallel to the other plane; (2) Triangle area formula: s= bc sina= ab sinc= ac sinb; (3) If two propositions are mutually inverse and negative, they have the same true or falsehood.

Ever since I was a child, I have always liked mathematics, and mathematics should be considered an excellent subject for me. I also remember a lot of related mathematical knowledge, for example: the slope of a primary function is positive and positively correlated, and the slope is negative and negatively correlated.

The image of a quadratic function is a parabola. The isotope angle is equal, the internal misalignment angle is equal, and the lateral internal angle is complementary. Pi is equal to.

Pythagorean theorem. The sum of the squares of the two right-angled sides of a right-angled triangle is equal to the square of the hypotenuse. Suppose that the length of the two right-angled sides of a right-angled triangle is a and b, respectively, and the length of the hypotenuse is c, then it can be expressed in mathematical language:

a²+b²=c²。I remember that Pythagoras, who first proved the Pythagorean theorem, was not only a mathematician, but also a philosopher.

I remember the most profound in junior high school mathematics, I don't have many knowledge points, and I do problems over and over again, such as verifying triangle congruence: edge edge, corner edge, corner edge, corner edge. The two straight lines are parallel, the internal wrong angles are equal, the isotope angles are equal, and the internal angles of the same side are complementary.

The sum of squares formulas: (a+b) a +2ab+b. I really liked math at the time.

I've always had a bad math score, and I always like to be biased. But remember a few: two straight lines are parallel, the inner and isotopic angles are equal, and the same side inner angles complement each other.

Unary Linear Equations, Binary Linear Equations. Pi, area. What geometric reasoning, algebraic representation.

This is still a bit much, although many questions will not be done, but some things are already engraved in my mind. For example, the Pythagorean theorem; Odd and even unchanged, symbols look at quadrants and the like. These are the basics, and there are some difficult ones that you can't remember.

The most impressive thing about the knowledge of mathematics is that the odd and the even are unchanged, and the symbols look at the quadrants.

There are also some Pythagorean theorem, cosine theorem, tangent, and so on.

Then there's the question of some derivatives and how to derive that result. There is also the question of probability, what is the probability of each and each of them, and then what is the probability after subtracting.

What I remember most clearly now should be the theorem about parallel lines in junior high school, which may be often encountered in life, and the other should be the theorem of trigonometric functions and the theorem of number sequences that I often encounter in the college entrance examination.

Odd and even unchanged, and the symbol looks at the quadrant.

Cosine theorem. Sine theorem.

and differential product. Accumulation and difference.

The two straight lines are parallel, the internal wrong angles are equal, the isotope angles are equal, and the internal angles of the same side are complementary.

The math knowledge points are as follows:1. The surface area of the cylinder = the side area of the cylinder + the bottom area 2, that is, the S surface = S side + S bottom 2 or 2 R H + 2.

2. The cone has only one bottom surface, and the bottom surface is a circle. The side of the cone is a curved surface.

3. Fractional multiplication: The meaning of fractional multiplication is the same as that of integer multiplication, which is a simple operation to find the sum of several identical additions.

4. Reciprocal: Two numbers whose product is 1 are called reciprocal to each other.

5. Fraction division application problem: first find unit 1. If the unit 1 is known, find the part or the corresponding fraction by multiplication, and find the unit 1 by division.

Primary School Mathematics Knowledge Points:

1. The commutative law of addition.

Two numbers are added together, and the position of the added number is exchanged, and their sum does not change, i.e., a+b=b+a.

2. Associative law of addition.

Add the three numbers, add the first two numbers first, and add the third number; Or add the last two numbers first, and then add them to the first number and their sum is unchanged, i.e., (a+b)+c=a+(b+c).

3. Multiplication commutative law.

The two numbers are multiplied, and the position of the exchange factor does not change their product, i.e., a b = b a.

4. Multiplication and associative law.

Multiply three numbers, first multiply the first two numbers, and then multiply by the third number; Or multiply the last two numbers first, and then multiply them with the first number, and their product remains the same, i.e., (a b) c = a (b c).

5. Multiplicative distributive law.

The sum of two numbers can be multiplied by one number, and the two additives can be multiplied by this number and then added to the two products, i.e., (a+b) c=a c+b c.

6. The nature of subtraction.

Subtracting several numbers in a row from a number can subtract the sum of all subtractions from this number without the same difference, i.e., a-b-c=a-(b+c).

The math knowledge points are as follows:

1. Representation of sets: enumeration and description methods are commonly used.

2. Factors and multiples: The definition of factors and multiples is a key knowledge in the fifth grade, and the main knowledge points are that when large numbers can be divisible by decimals, large numbers are multiples of decimals, and decimal numbers are a factor of large numbers.

3. The definition of the cuboid is that the three-dimensional figure surrounded by six rectangles is called the cuboid, which is characterized by 6 faces, 8 vertices and 12 edges, and the opposite sides are exactly the same, and the relative edges are equal in length.

4. Mutual heterogeneity: Any two elements in the set are different objects. If written, it is equivalent to. Anisogeneity makes the elements in the set not duplicated, and when two identical objects are in the same set, they can only be counted as one element of the set.

5. Venn diagrams can be represented as sets, such as complements ((b)), intersections (a b), union (a b), and so on.

Mathematics Knowledge:1. Addition commutative law: the position of two numbers is added and the sum is unchanged.

2. Addition associative law: a + b = b + a.

3. Multiplicative commutative law: a b = b a.

4. Multiplicative associativity: a b c = a (b c).

5. Multiplicative distributive property: a b + a c = a b + c.

6. The nature of division: a b c = a (b c).

7. The nature of division: In division, the dividend and the divisor expand (or shrink) the same multiple at the same time, and the quotient remains unchanged. o divided by any number that is not o gives o.

Simple multiplication: multiplication of the multiplier, the multiplier at the end of the o, you can first multiply the front of the o, zero does not participate in the operation, a few zeros are falling, added at the end of the product.

8. Division with remainder: dividend = quotient divisor + remainder.