Mathematics humor story

Mathematics humor story

Interesting stories of Mathematics

About 1500 years ago, European mathematicians did not know to use "0". They used Roman numerals. Roman numerals use several symbols to represent numbers. According to certain rules, they are combined to represent different numbers. In the use of such numbers, the number "0" is not needed
At that time, a scholar in the Roman Empire discovered the symbol "0" from the Indian notation. He found that it was very convenient to carry out mathematical operations with "0". He was very happy and introduced the Indian method of using "0". After a period of time, this matter was known by the pope at that time, The power of the Pope is far more than that of the emperor. The Pope is very angry. He rebuked that the holy number was created by God, and there is no "0" in the number created by God. Now whoever wants to bring it in will blaspheme God! So the Pope ordered to arrest the scholar, torture him, and clamp his ten fingers tightly, In this way, "0" was forbidden by the foolish and cruel Pope
However, although "0" was banned, Roman mathematicians still used "0" secretly in mathematical research regardless of the ban. They still made a lot of mathematical contributions with "0". Later, "0" was widely used in Europe, but Roman numerals were gradually eliminated
Children, do you know the story of Gauss as a child?
When Gauss was in primary school, once after the teacher taught addition, because the teacher wanted to have a rest, he put forward a question for the students to calculate
1+2+3+ . +97+98+99+100 = ?
The teacher is thinking, now the children must count to the end of the class! Just about to excuse out, but Gauss stopped! Originally, Gauss has figured out, children, do you know how he counted?
Gauss tells you how he works out: add 1 to 100 and 100 to 1 in two rows, that is to say:
1+2+3+4+ . +96+97+98+99+100
100+99+98+97+96+ . +4+3+2+1
=101+101+101+ . +101+101+101+101
There are a total of 100 101, but the formula is repeated twice, so divide 10100 by 2 to get the answer equal to
Since then, the learning process of Gauss primary school has already surpassed other students, which has laid the foundation for his future mathematics and made him a mathematical genius!
In daily life, mathematics is everywhere, such as: buy vegetables, sell vegetables, how much to count
Here is a little story, a story between numbers
One day, when digital cards were having lunch together, the youngest one spoke
My brother said, "let's take some pictures together. What do you think?"
0 brothers and sisters said in unison: "good."
"Brother 8 said:" brother 0's idea is really good. I'll be a good man. I'll supply cameras and film for brother 8, OK
Old 4 said: "brother 8, it's good, but it's too much trouble. It's better to use my digital camera. That's settled."
So, they became busy, and finally + helped them take pictures, and immediately sent the digital camera to the printing shop. The computer elder sister wanted them to pay, but who would pay? They looked at each other one by one, and this was the computer elder sister said: "a total of 5 yuan, you have a total of 11 brothers and sisters, how many yuan do you pay on average?"
Among them, Lao Liu is the smartest. This time, he is the first to work out the result. Do you know how he worked it out?
Tang monks and disciples picking peaches
One day, Monk Tang ordered his disciples Wukong, Bajie and Shaseng to go to Huaguo Mountain to pick some peaches. Not long after they finished picking peaches, they came back happily. Master Tang asked: how many peaches do you each pick back?
Bajie said with a smile: Master, I'll test you. We each pick the same amount of peaches. There are less than 100 peaches in my basket. If we count three peaches, there will be one left. How many peaches have we picked?
Monk Sha said mysteriously: Master, I'll test you too. If I count four peaches in my basket, there will be one left. How many peaches have we picked?
Wukong said with a smile: Master, I'll test you, too. If I count five peaches in my basket, there will be one left at the end. How many peaches will we each pick?
Monk Tang quickly told us how many peaches each of them picked. Do you know how many peaches each of them picked?

Seeking the network knowledge map of mathematics in Volume 2 of Grade 7

Chapter 1 rational numbers 1.1 positive numbers and negative numbers are called negative numbers when they are preceded by negative signs before numbers other than 0. They have the opposite meaning to negative numbers, that is, numbers other than 0 are called positive numbers (sometimes positive numbers are preceded by "+", if necessary). 1.2 positive integers, 0 and negative integers of rational numbers are called integers, Positive and negative fractions are called fractions. Integers and fractions are called rational numbers. Numbers are usually represented by points on a straight line, which is called number axis. There are three elements of number axis: origin, positive direction and unit length, This point is called origin. Only two numbers with different symbols are called opposite numbers. (example: the opposite number of 2 is - 2; the opposite number of 0 is 0). The distance between the point representing number a and the origin on the number axis is called absolute value of number a, The absolute value of a positive number is itself; the absolute value of a negative number is its opposite number; the absolute value of 0 is 0. Two negative numbers, whose absolute value is larger, are smaller. 1.3 addition and subtraction of rational numbers: 1. Add two numbers with the same sign, take the same sign, and add the absolute value. 2. Add two numbers with different signs whose absolute values are not equal, Take the sign of the adder with the larger absolute value, and subtract the smaller absolute value from the larger absolute value. Two numbers that are opposite to each other are added to get 0. 3. A number is added with 0, and the number is still obtained. Rational number subtraction rule: subtracting a number is equal to the opposite number of this number. 1.4 rational number multiplication and division rule: two numbers are multiplied, the same sign is positive, the different sign is negative, The rule of division of rational numbers: divide by a number that is not equal to 0, equal to the reciprocal of multiplication of the number. Divide by two numbers, the same sign is positive, the different sign is negative, and divide by the absolute value. Divide by any number that is not equal to 0, get 0. M ì the operation of finding the product of n identical factors is called multiplication, The result of a power is called power. In the nth power of a, a is called base number, and N is called exponent. The odd power of a negative number is negative, and the even power of a negative number is positive. Any power of a positive number is positive, and any power of 0 is 0, The scientific counting method is used. From the first non-zero digit on the left side of a number to the last digit, all the digits are significant digits of the number. Chapter 2, equation 2.1, from the formula to the equation, the equation is an equation with unknowns. The equation contains only one unknowns (elements) x, and the exponent of unknowns x is 1 (Times), This kind of equation is called linear equation with one unknown. To solve the equation is to find the value of the unknowns that make the left and right sides of the equal sign equal. This value is the solution of the equation. The properties of the equation are as follows: 1. The results of adding (or subtracting) the same number (or formula) on both sides of the equation are still equal. 2, The results are still the same. 2.2 starting from the ancient algebra book -- the discussion of linear equation with one variable (1) moving the sign of one side of the equation to the other side is called moving the term. Chapter 3 preliminary understanding of graphics. 3.1 colorful graphics geometry is also called solid. Surrounded by the body is the surface. 3.2 line, ray, line axiom: in all the lines between two points, The length of the line segment connecting two points is called the distance between the two points. The measurement of 3.3 angle is 1 degree = 60 minutes 1 minute = 60 seconds 1 cycle angle = 360 degrees 1 flat angle = 180 degrees 3.4 angle comparison and operation. If the sum of two angles is equal to 90 degrees (right angle), the two angles are called complementary angles, If the sum of the two angles is equal to 180 degrees (flat angle), they are called complementary angles, That is to say, each angle is the complement of the other angle. The complement of equal angle is equal, and the remainder of equal angle is equal. Chapter 4 data collection and collation collecting, collating, describing and analyzing data is the basic process of data processing, The main properties of a triangle are: (1) the sum of any two sides of a triangle is greater than the third side. (2) the sum of the three inner angles of a triangle is equal to 180 degrees. An outer angle of a triangle is equal to the sum of its two non adjacent inner angles. (3) the corresponding sides of an congruent triangle are equal, The corresponding angles are equal There are three sides corresponding to the same two triangle congruence (abbreviated as "side" or "SSS"); there is an angle and the two sides of the corner corresponding to the same two triangle congruence (abbreviated as "side corner" or "SAS"); there are two angles corresponding to the same two triangle congruence (abbreviated as "corner" or "ASA"); there are two angles and one of them (5) the distance from the point of the vertical bisector to the two ends of the line segment is equal. The distance from the point of the vertical bisector to both sides of the angle is equal. Chapter 2: main properties of graphics and transformation (1) the vertical bisector of the axis of symmetry connects the line segment between two symmetrical points, Axisymmetric transformation does not change the shape and size of the figure. (2) translation transformation does not change the shape, size and direction of the figure, and the line segments connecting the corresponding points are parallel and equal. (3) rotation transformation does not change the size and shape of the figure, and the distance from the corresponding point to the center of rotation is equal, and the angle formed by the line between the corresponding point and the center of rotation is equal to the angle of rotation. (4) The similarity transformation does not change the size of every corner in the graph; each line segment in the graph expands (or shrinks) by the same multiple. Chapter 3: possibility of events (1) under certain conditions, the events that are bound to happen are called inevitable events; under certain conditions, the events that are bound not to happen are called impossible events; under certain conditions, the events that are bound to happen are called impossible events, The events that may or may not happen are called uncertain events (or random events) (2) mathematically, the probability of the occurrence of an event is also called the probability of the occurrence of an event. The probability of the occurrence of an inevitable event is 1 or 100%, and the probability of the occurrence of an impossible event is 0. If P is used to represent the probability of the occurrence of an uncertain event, then 0 < p < 1. Chapter 4: contains two unknowns, The equation that contains the term of unknown number whose degree is once is called bivariate linear equation. The value of a pair of unknowns that make the value of both sides of bivariate linear equation equal is called a solution of bivariate linear equation