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Activity objectives: 1. Let the children know that the mother frog is a tadpole.

2. Learn to draw the shape of a tadpole with dots and lines.

Preparation for the activity: 1. "Little Tadpole Looking for Mother" wall chart.

2. State deficit work paper, cotton swabs, and pigments.

3. There are a number of headdresses such as frogs, tadpoles, goldfish, white geese, turtles, ducks, etc.

Pythagoras.

Legend has it that he was a very good teacher, and he thought that everyone should know some kind of geometry. Once he saw a poor and industrious man who wanted to teach him geometry, so he suggested to him that if he could learn a theorem, he would give him a penny.

The man began to learn geometry with him for money, but after a while, the student became very interested in geometry, and asked Pythagoras to teach it faster, and suggested that if the teacher taught one more theorem, he would give him a coin. It didn't take long for Pythagoras to get back all the money he had given to the student.

The Pythagoreans believed that "1" was the first principle of number, the mother of all things, and wisdom; "2" is the principle of opposition and negation, is opinion; "3" is the form and form of all things; "4" is justice, a symbol of the creator of the universe.

5" is odd and even, male and female and combined, also marriage; "6" is the life of God, the soul; "7" is an opportunity; "8" is harmony, but also love and friendship; "9" is rational and powerful; "10" encompasses all numbers, is perfect and beautiful.

Pythagorean segmentation: (a:b=:a).

The Pythagoreans believed that the ratio of the orbits of the sun, moon, and stars to the distance of the earth was equal to the three consonant intervals, i.e., octaves, fifths, and fourths.

The Pythagoreans believed that in terms of quantity, summer is dominated by heat, winter is dominated by cold, spring is dominated by dry, autumn is dominated by wet, and the most beautiful season is the harmonious and balanced distribution of cold, hot, dry, and wet elements in quantity.

From the perspective of mathematics, that is, the contradictory relationship of quantity, the Pythagoreans enumerated ten opposing categories, such as finite and infinite, one and many, odd and even, square and rectangular, good and evil, light and dark, straight and curved, left and right, yang and yin, dynamic and static, among which the opposition between finite and infinite, one and many, is the most basic opposite, and said that everything in the world is reduced to these ten pairs of opposites.

He's too long to use mine.

The story of a mathematician - Zu Chongzhi.

Zu Chongzhi (429-500 AD) was a native of Laiyuan County, Hebei Province during the Northern and Southern Dynasties of China He read many books on astronomy and mathematics since he was a child, and he was diligent and studious, and practiced hard, which finally made him an outstanding mathematician and astronomer in ancient China

Zu Chongzhi's outstanding achievement in mathematics is about the calculation of pi Before the Qin and Han dynasties, people to"Trail three times a week"As pi, this is"Ancient rate"Later, it was found that the error of the paleorate was too large, and the pi should be"The circle diameter is more than three days", but how much is left, opinions differ Until the Three Kingdoms period, Liu Hui proposed a scientific method for calculating pi"Circumcision", use the circumference of the circle inscribed regular polygon to approximate the circumference of the circle Liu Hui calculates that the circle is inscribed with 96 polygons, and obtains =, and points out that the more sides of the inscribed regular polygon, the more accurate the value obtained Zu Chongzhi on the basis of the achievements of his predecessors, after hard work, repeated calculations, found In between and and obtained the approximate value in the form of fractions, taken as the approximate rate , taken as the dense rate, where the six decimal places are taken, it is the fraction of the closest value of the numerator denominator within 1000 What method did Zu Chongzhi use to get this result, Now there is no way to examine if it is assumed that he will press Liu Hui's"Circumcision"If you want to find this method, you have to calculate that the circle is connected with 16,384 polygons, which requires a lot of time and labor! It can be seen that his tenacious perseverance and intelligence in his scholarship are admirable Zu Chongzhi's calculation of the dense rate, it has been more than a thousand years since foreign mathematicians achieved the same result In order to commemorate Zu Chongzhi's outstanding contributions, some foreign historians of mathematics have suggested that = be called"Ancestral rate"．

Zu Chongzhi read the famous classics at that time, insisted on seeking truth from facts, he compared and analyzed a large number of materials from his own measurement and calculation, found the serious errors of the past calendar, and had the courage to improve, and at the age of 33, he successfully compiled the "Ming Calendar", opening up a new era in the history of the calendar

Zu Chongzhi also worked with his son Zu Xuan (also a famous mathematician in China) to solve the calculation of the volume of the sphere with ingenious methods One of the principles they adopted at that time was:"If the power potential is the same, the product cannot be different"That is, two three-dimensional dimensions located between two parallel planes are truncated by any plane parallel to these two planes, and if the areas of the two cross-sections are constantly equal, then the volume of the two three-dimensional dimensions is equal This principle is called Cavaleri's principle in Spanish, but it was discovered by Cavaleri more than a thousand years after Zu In order to commemorate the great contribution of Zu's father and son in discovering this principle, everyone also calls this principle"The principle of ancestry"．

"Ancient Thaumaturgy".

I am a mausoleum keeper in Xinzheng".

The King of Tomb Robbers" opens the coffin and makes a fortune

Three points into the tomb "Touching the Golden Order".

Qiankun Formation" March Yang Burial Ground Xuanjing

Pointing out the Qiankun" Xishuangbanna Bronze Armor Corpse

Take a look at "Eye in the Sky". I think it's pretty good. Although it's not like Notes and Ghost Blowing Lamp, it's a pure tomb robbery, but it's also related to tomb robbing.

...The brilliance of the descendants of Maoshan lies in the analysis of the charm and the Maoshan technique. It's not the same as an adventure like a ghost blowing a lamp**.

It is said that it is a tomb robbery, but in fact it is not an expedition in nature. The eye of the sky is really good. But overall it's more like a detective**.

There is nothing to see for other tomb robbers**.

1 Ghost blowing the lamp author Tianxia Ba sings a new work: "Ghost Hitting the Wall".

2 The new work of the third uncle of the southern faction, the author of the tomb robbery notes: "The Ghost Coffin of the Yellow River".

In this way, I have the same idea as the landlord, but since I haven't found anything comparable to the articles of those two, I can only continue to watch the wonderful masterpieces of the two of them to quench my thirst!

Do you still have to tie the bell to the bell, hehe.

You can go to the blog of the third uncle or Ba Sing to read these two **, or you can find a bigger literature**, there will be them.

I also want to be wordy: The third uncle's tomb robbery notes Do you want to end it How many years have passed, why are there still pits that have not been buried, I am old

"I am a mausoleum keeper in Xinzheng", not bad.

Ghost blowing lantern, Yellow River ghost coffin, brave adventure.

The ghost coffin of the Yellow River is good, and it was also written by the third uncle, so it is recommended to take a look.

Psychic Detective Yakumo When the Cicada Cries Psychometric Gosick (a bit of a girl......Magic Fight When the sea cat's cry.

Well, I don't know if the horror is acceptable.

When the cicada cries and cries, you must not find out what the result is from the small details, and you must not see what is going on, there is a lot of foreshadowing, and you can't think of what it is. It's not the same type as those three, the process is depressed, and the ending is slight**.

The second is another.,It's a lot worse than the chilling cicada.,But it's still very strong.,Seriously, I really don't think Conan has anything after watching the chilling cicada.,It's not a brain-bother, it's not a brain-sucking bar (shaking his head) and the last is the ice fruit.,It's not a brain-wrenching.,It's very****.,The painting style is better than all**.。

another

Future Diary. Monogatari series BRS

"The Bond of Reasoning", "Chess Soul", "Clever Ichishu", "Seven Samurai", "Lupin III".

Fantasy Noble Son Mind Detective Yakumo Two very good-looking.

Magic Kaito is about Kidd, the monster thief.

Psychic Measurer, Gosick, Future Diary.