Design of primary school mathematics handwritten newspaper (1) Design of primary school mathematics handwritten newspaper (2) Design of primary school mathematics handwritten newspaper (3) Design of primary school mathematics handwritten newspaper (4) Mathematical short story "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.