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1. The bee hive is a strict hexagonal columnar body, which has a flat hexagonal opening at one end and a closed hexagonal rhombus pyramidal mu chi bottom at the other end, consisting of three identical rhomboids. The diamond-shaped shape that makes up the chassis has an obtuse angle of 109 degrees 28 minutes, and all acute angles are 70 degrees 32 minutes, which is both strong and economical. The hive wall is millimeter thick, and the error is extremely small.
2. Red-crowned cranes always migrate in flocks, and they are arranged in a "human" shape. The angle of the "human" glyph is 110 degrees. More precise calculations also show that half of the angle of the "man" – that is, the angle between each side and the direction of the crane flock is 54 degrees, 44 minutes and 8 seconds!
And the angle of the diamond crystal is exactly 54 degrees, 44 minutes and 8 seconds!
3. In winter, cats always hold their bodies into a spherical shape when they sleep, and there is also mathematics in this process, because the spherical shape makes the surface area of the body the smallest and thus emits the least heat.
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1. Famous quotes in mathematics:
1) Everything counts. --Pythagoras.
2) There is no king in geometry. --Euclid.
3) Mathematics is the word that God uses to write the universe. --Galileo.
4) I was determined to abandon geometry that was only abstract. That is to say, no longer think about issues that are just for the training of the mind. I did this in order to study a different kind of geometry, that is, a geometry aimed at explaining natural phenomena.
Rene Descartes (1596-1650).
5) Mathematicians are trying to discover some order of the sequence of prime numbers on this day, and we have reason to believe that this is a mystery that the human mind can never penetrate. --Euler.
6) Some beautiful theorems in mathematics have the property that they are easy to generalize from facts, but the proofs are very hidden. Mathematics is the king of science. --Gauss.
7) This is the benefit of a well-structured language, whose simplified notation is often the source of esoteric theory. --Pierre Simon Laplace (1749-1827).
2. Mathematical applications in daily life.
Once, my mother made cakes, and I could put two cakes in the pot. I thought, isn't this a math problem? It takes two minutes to bake a cake, one minute each for the front and back sides, and a maximum of two cakes in the pot at the same time, so how many minutes does it take to bake three cakes at most?
I thought about it and came to the conclusion: it takes 3 minutes: put the first one.
1. Put the second cake into the pot at the same time, after 1 minute, take out the second cake, put in the third cake, and turn the first cake over; Bake for another 1 minute, so that the first piece of bread is ready, take it out. Then put the reverse side of the second cake and turn the third cake over at the same time, so that it is all done in 3 minutes.
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<> Qin and Han dynasties were a period of rising feudal society, with rapid economic and cultural development. It was during this period that the ancient Chinese mathematical system was formed, and its main signs were the emergence of arithmetic as a specialized discipline and the emergence of mathematical works represented by the Nine Chapters of Arithmetic. Children, now let's take a look at the math hand-copied newspaper.
The Nine Chapters of Arithmetic has several distinctive features: it takes the form of a set of mathematical problems divided into chapters by category; Equations are all developed from the calculation notation; arithmetic and algebra are the mainstays, and few graphic properties are involved; Emphasis on application, lack of theoretical elaboration, etc.
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The content of the math handwritten newspaper about life is short:
The Mathematician's Story: Performing Calculations on Wrapping Paper.
Mathematician Hua Luogeng dropped out of school when he was a teenager and stayed at home to help his father run a small store. In his free time, Hua Luogeng often uses wrapping paper to solve mathematical problems.
One day, Hua Luogeng was performing calculations at the counter, and his father asked him to clean the inner room. After cleaning, he returned to the counter and couldn't help crying: "Where's the scratch paper for my calculations?" ”
Dad searched left and right, but couldn't find it. Suddenly, he pointed to the back of a man in the distance and said, "I have sold him cotton bags." Lao's".
Hua Luogeng caught up with the man and bowed to him. Then he took out his pen and copied the arithmetic problems written on the cotton paper on the back of his hand.
Passers-by looked at Hua Luogeng in confusion, shook their heads and said, "What a weird child!" ”
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A selection of math hand-copied newspapers in life.
Mathematical relationships are everywhere in life, let's take advantage of the mathematical. Multiplication relationship, help Ms. Jin calculate how much all the students in class 3 (4) should pay for the school cafeteria in November 2009?
Mathematical Relationship 1: Total per person = Unit price (per meal) x quantity (number of days).
Total amount per person = 6 20 = 120 yuan.
Mathematical Relationship 2: Total amount of the whole class = unit price (total amount per person) x quantity (number of meals in the class).
Total class = 120 43 = 5160 RMB.
Through the above calculations, we know that the school food fee payable by all students in November 2009 is 5,160 yuan.
Using the above multiplication relationship again, let's make the following assumptions.
Hypothesis 1: In November, the school organizes students to go out for a day of autumn outing, and the actual number of meal days per person is 19 days (20-1).
Total amount per person = unit price (per meal) Number (days).
Total amount per person = 6 19 = 114 yuan.
Total amount of the class = unit price (total amount per person) quantity (number of meals in the class).
Class total = 114 43 = 4902 yuan.
Hypothesis 2: In November, a student was hospitalized and asked the teacher for a month off, and the actual number of diners was 42 (43-1).
Total amount per person = unit price (per meal) Number (days).
Total amount per person = 6 20 = 120 yuan.
Total amount of the class = unit price (total amount per person) quantity (number of meals in the class).
Total class = 120 42 = 5040 yuan.
In real life, in addition to multiplication relations, mathematical relations also include addition and subtraction relations, division relations, and so on. Therefore, learning mathematics well can help us solve many problems in real life.
Self-care and self-reliance, what to write in the content of the hand-copied newspaper.
Write whatever you want.
October 1 is China's National Day. Under the leadership of the Communist Party of China, the Chinese people have gone forward one after another and won great victories in the people's revolution. On October 1, 1949, the founding ceremony was held in Tiananmen Square in Beijing, the capital, and in the rumbling salute, the **People**President solemnly announced the founding of the People's Republic of China and raised the first five-star red flag with his own hands. >>>More
The phenomenon of swearing by elementary school students
My Moore Manor is 390,000, I don't lie to you.