Interesting Story of Mathematics in Senior One (1): 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 is composed 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? Glyph. ? 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's web even with the compass of a ruler.
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.
Interesting Story of Grade One Mathematics (2): The Story of Farmers and Potatoes
Three farmers checked into a hotel and asked the shopkeeper to cook some potatoes for them. Then they all went to bed. Instead of waking them up, the shopkeeper cooked potatoes, put a pot of potatoes on the table and walked away. A farmer woke up and saw potatoes on the table. He counted, took out a third, ate and went to bed. After a while, another farmer woke up. He didn't know that a companion ate one.
So he counted the potatoes in the pot, ate a third, and went to bed again. Then, the third farmer woke up. He thought he was the first person to wake up. He counted the potatoes left in the basin and ate a third. Just then, his two companions woke up and saw eight potatoes left in the basin, so everyone explained it. Please calculate how many potatoes the shopkeeper brought. How many potatoes did you eat? How many potatoes does one person have to eat before three people can eat as much?
After the third farmer finished his share, there were eight left, so he woke up and saw twelve potatoes in the basin. These twelve were left by the second farmer who woke up. Now, just go ahead and you will get the answer soon.
Interesting Story of Grade One Mathematics (3): The Old Man and the Horse
Once upon a time, there was an old man. On his deathbed, his three sons gathered at the bedside.
He said to his sons, I have seventeen horses. I will leave them to you and give them to three people. When the horse was divided, the boss contributed the most, with half of it; The second child, one third; The third is the youngest, you, accounting for one ninth of the total. ?
After barely saying these words, the old man died. When the three brothers executed their wills, they agreed that these horses were their father's favorite things before his death, and they must never divide any of them into several pieces. But the will must be completely obeyed. What should we do?
As it happens, at this moment, their old uncle arrived on horseback. After listening to the story, he raised his eyebrows and said, let me share it. ?
Guess, how did the old uncle divide the horse?
Because everyone wants an integer horse, according to the will, when dividing horses, the number of horses should be the common multiple of three denominators. The least common multiple of denominators 2, 3 and 9 is 18, so the total number of horses separated by horses should be a multiple of 18. The old man left his sons 17 horses, and the old uncle temporarily borrowed a horse he brought to make up the number. * * * There are 18 horses participating in the distribution.
Ready, the old uncle began to read and execute the will:
? Where was the boss when we split the horse? He contributed the most, and got half of it? After reading this, the old man counted nine horses and let the boss lead him:
Second child, one third? After reading this, the old uncle counted six horses and let the second one lead him:
? The third is the youngest, you, accounting for one ninth of the total. ? After reading the last sentence, the old man counted two horses and let the third horse lead him:
The sum of the horses divided by the three younger generations happened to be left by the father 17 horses;
9+6+2= 17。
There are 18 horses in the racecourse, and now there is only one left. Of course, my uncle borrowed it temporarily, and now it is still returned to its owner.