Mathematics in animals? Genius?
Honeycomb is a strictly hexagonal cylinder, with a flat hexagonal opening at one end and a closed hexagonal diamond bottom at the other end, which consists of three identical diamonds. The rhombic obtuse angle of the chassis is 109 degrees 28 minutes, and all acute angles are 70 degrees 32 minutes, which is both firm and material-saving. The honeycomb wall thickness is 0.073 mm, and the error is very small.
Red-crowned cranes always move in groups and form a row? People? Open the word. ? People? The angle of the glyph is 1 10 degrees. More accurate calculations also show that? People? Half the included angle of the glyph, that is, the included angle between each side and the advancing direction of the crane group is 54 degrees, 44 minutes and 8 seconds! And the angle of diamond crystal is exactly 54 degrees, 44 minutes and 8 seconds! Is it coincidence or some kind of nature? tacit understanding
Spider knot? Gossip? The net is a complex and beautiful octagonal geometric pattern, and it is difficult for people to draw a symmetrical pattern like a spider even with rulers and compasses.
In winter, when a cat sleeps, it always hugs its body into a ball. There is also mathematics in it, because the shape of the ball minimizes the surface area of the body, so it emits the least heat.
Real math? Genius? It's coral Coral wrote it on herself? Calendar? They are on their walls every year? Portrait? 365 stripes, obviously one day? Painting? One. Strangely, paleontologists find corals 350 million years ago every year? Painting? 400? Watercolor painting? . Astronomers tell us that at that time, the earth only had 2 1.9 hours a day, not 365 days a year, but 400 days.
The origin of Arabic numerals
Xiaoming is a child who likes to ask questions. One day, he became interested in the numbers 0-9: Why are they called numbers? Arabic numerals? And then what?
So he went to ask his mother, who was a math teacher, "Since 0-9 barks? Arabic numerals? Then it must have been invented by Arabs, mom, right?
Mom shook her head and said that Arabic numerals were actually invented by Indians. About 1500 years ago, Indians used a special word to represent numbers. There are 10 words, and you can write both strokes. Later, due to contacts between countries, these figures were introduced into Arabia. Arabs thought they were very simple, so they began to use them widely in their own countries and spread throughout Europe. In this way, they gradually became the numbers we use today. Because Arabs have played a great role in the spread of this number, people are used to calling it? Arabic numerals? . ?
Xiao Ming said happily:? I see. Mom, can this be called? Could it be wrong? Xiao Ming and his mother both laughed.
Children's song competition
The math school holds a children's song competition, with the elephant teacher as the referee.
The little monkey Congcong was the first to raise his hand. Congcong cleared his throat and began to recite. I can calculate carry addition, and I can only add it if the number of digits is right. The number of digits should be aligned with the number of digits. When the number of digits exceeds ten, the number of digits should be advanced to ten. Ten digits plus one plus one can count quickly and accurately. ?
As soon as Cong Cong finished speaking, the dog Jia Jia raised his hand and said, My nursery rhymes are very similar to those of Cong Cong. ? The elephant teacher said:? All right! Let's listen to your nursery rhymes. ? Jia Jia walked up to the stage and recited: abdication and subtraction are not difficult, and numbers can be reduced if they are aligned. If the single digits are small enough, ten people can borrow one. If ten people return, one will be ten, and if they return, one will be missing. How to reduce ten digits, ten digits will be reduced again and again. ?
Everyone applauded their wonderful performance. The elephant teacher said:? Their children's songs taught us to know carry addition and abdication subtraction, so we thought they all won the championship. Do you agree with the teacher and applaud them happily?
The diary led him to success.
Jacob. Bernoulli is a famous mathematician in Europe. He was born in 1654 in Basel, Switzerland.
From the age of 13, Jacob kept a diary quietly, and he recorded all his gains and problems in his study. Opening his diary, I have the experience of reading books, newspapers and magazines, the inspiration of discussing math problems with others, and the sudden whim of solving math problems. Diary has become Jacob's problem set, problem-solving ideas and methods set, and the harvest and achievement set of studying mathematical problems.
Jacob's persistent pursuit of mathematics finally led him to learn mathematics. He became a professor of mathematics in university of basel at the age of 33.
Xiao Xiong opens a shop.
Little bear doesn't like studying. One day, it suddenly found it interesting to do business, so it opened a fruit shop next to the school. Rabbit and monkey are his classmates, and they have agreed to punish this lazy guy who doesn't like school.
They came to bear's fruit shop.
? How much are these peaches? Asked the little monkey.
? The first basket of 6 yuan weighs 3 Jin, and the second basket of 6 yuan weighs 2 Jin. ? The bear said.
The little monkey said again:? If I take out 5 kilograms from two baskets, I will pay you 12 yuan, right?
The bear nodded.
? Then I'll take it all. Since 5 kg is 12 yuan, then 60 kg is 12? 12= 144 yuan, did the little monkey say that?
? Exactly. Exactly. ? Said the bear.
So the little monkey bought all the peaches, paid the money and left happily with the little rabbit.
In the evening, Bear paid the bill, so he lost money. It thinks that no one else has bought anything except this little monkey. The next day, the rabbit came to the bear, and the bear told the rabbit about it. Little Nutbrown hare said with a smile, it's all because you don't study well. Let's teach you a lesson. ? After that, he supplemented the bear with less money.
Bell hung his head in shame. Since then, Little Bear has been very serious in class every day. The three of them became good friends.
Doctor of mathematics? A mistake?
All citizens of Time Kingdom have just finished a math exam, and Dr. Time invited the doctors of Mathematics Kingdom to give guidance on marking. Yes, yes, the doctor happily picked up a test paper, but the more he read it, the more angry he became. Why? It turned out that when he checked the examination paper, he found that all the questions were wrong, such as:
7+6= 1; 6+6=0; 3-7=8
Yes, yes, the doctor reflected the problem to Dr. Time, who looked at the test paper and said to him with a smile. Doctor, they did nothing wrong. Because in the kingdom of time, 12 pm is 0 pm, so 6 = 6 = 0; Six hours after 7 o'clock, it is 13, that is 1, that is, 7+6 =1; 3-7 means 8: 00 seven hours before 3: 00?
Yes, yes, the doctor patted his head and said, yes! Well, it seems that I have to continue my doctoral studies. ?
The accident is over, children. Do you know clocks? Can you calculate the time? Shall we study together? Time? .
In daily life, mathematics is everywhere, such as buying and selling vegetables.
The following is a short story, a story between numbers.
One day, when the digital cards were having lunch together, the youngest one spoke.
0 the younger brother said:? Let's take some photos together. what do you think?
0' s brothers and sisters said in unison: All right. ?
Brother 8 said: My brother's idea is really good. I will be a good person once. Shall I provide camera and film for Lao 8?
Old 4 spoke:? Brother 8, it's good, but it's a little too much trouble. Better use my digital camera. That's settled. ?
So, they got busy. Finally, they took pictures for them and immediately sent the digital camera to the print shop. The computer sister tried to ask them for money, but who paid for it? They looked at each other one after another. This is what Sister Computer said. A ***5 yuan money, you a * * eleven brothers and sisters, an average of one person to pay how many yuan?
Among the eleven of them, Lao Liu is the cleverest, and this time he is the first to work out the result. Do you know how it is worked out?