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- Yan Zai briefly talked about the expression forms of addition, subtraction, multiplication and division. Addition is one stone plus one stone. Multiplication is to slap the stone into four pieces, which is relatively large. Six stones, on average, each stone is made into seven pieces. Block, that is forty-two Subtraction is clear at a glance, and division is more difficult to express
In short, after such and such basic explanations, the eyes of the old man have begun to shine, and even the little celestial master squatted down, watching intently.
Unknowingly, some people began to gather aroundall watching the fun.
Yan Zai then wrote down a simple formula "cc=aa+bb". Of course, the form of expression is not represented by letters, but by squares, circles, and triangles.
For example Ma Ma Zai = Gu Gu + Jiao Jiao.
The old man was fascinated. For the next period of time, it was about some theoretical explanations of basic mathematics. The old man had a hard time listening, but the little celestial master was surprisingly able to understand. This is probably due to the difference in identity. Although the old man has the blood of a god , but he will grow old eventually, and the little celestial master is a Qi refiner with a long lifespan, and his age is locked at a young age, which keeps his wisdom and thoughts always clear.
In this regard, Yan Zai said that although he does not know quantum mechanics and has forgotten a lot of calculus, as an outstanding pillar talent in a country, it is of course impossible for him not to know basic mathematics.
Right, it is still possible to solve a binary linear equation or something.
It's just that I didn't expect that in this era of ancient ancestors, mathematics had a place to pretend.
It is true that there is nothing in the world that cannot be pretended to be coercive. As long as your knowledge is higher than that of your opponent, the opponent will not know whether what you say is right or wrong.
More and more people gathered around. Some passers-by pushed their carts and stopped. Some people understood, some didn't understand, and some stayed for a long time, and their wives found them.
Immediately afterwards there was a meal of reprimands and complaints, probably because they were grazing and you were chopping firewood, but the sheep were full, where is your firewood?
So someone beside him made a fuss and asked Concubine Zai: "So, what's the use of proving these numbers?"
Similar words were once asked by soldiers from the Saltwater tribes in Hongzhou.
Šu Zai said: "How high is the sky?"
The man replied: "I don't know."
Yu Zai said: "It can be measured with this number, but although it can be measured, it is not very helpful to everyone's life, but it is very useful for geologists and Shanyu. Because if you can measure the sky, you can measure the earth; if you can measure the earth, you can measure mountains, hills, hills, and ruins; if you can measure these, you can know the trend and flow of mountains and rivers."
"Then, geologists and people from Shanyu can use this theorem to avoid taking wrong paths and climbing dangerous situations. It is also very useful in your daily life!"
"Everyone, who revised the current four-qi calendar? It was the Emperor Fangxun, and why was the observatory in the land of Tao Tang established? It was built for the accuracy of the farming season."
"Your house should be built so that it is not afraid of rain. In fact, this theorem has been used. Why can the inclined angle roll down the rain? People all over the world think this is a natural phenomenon, but they don't explore why. Of course, Everyone can't even eat enough, who has time to care about this!"
Šu Zai made a joke, and everyone around laughed, and the atmosphere became much more lively.
Afterwards, Yan Zai took out the scales. After these simple scales appeared here, after understanding the simple operation method, everyone exclaimed that it was a masterpiece given by God, and it was human wisdom to correct them.
Immediately afterwards, without panting, Yan Zai threw out a question from the scale: "Today, there are five sparrows and six swallows, gathered separately and weighed by scales. The sparrows gathered together are heavy, and the swallows are light. A sparrow and a swallow are exchanged, and the weights are equal, five sparrows and six swallows are equal to one, how much does each sparrow and swallow weigh?"
Yan Zai looked at the crowd and said again: "Listen to me, one one gets one, two two gets four"
On this land, "Nine Nine Songs" began to echo.
The sky is getting dark and the sun is setting towards the west. Hundreds of people have gathered here, talking with each other among the topics contained in the book. Some people don't like mathematics at first, but they like to argue. Since they like to argue, they must learn .
Yu Zai did not expect that a crowd would turn into a large-scale academic seminar in the end. After seeing that it was getting late, they had to leave. Everyone woke up like a dream. They communicated with each other, and strangers became familiar with each other. , become friends.
The old man thanked Yun Zai, saying that seeing him today really opened a new door for him!
The little celestial master was also surprisedSurprisingly, he used to think that numbers were just a pastime to pass the time, but he didn't expect that there are such profound principles in it!
Sure enough, all things and things, known or not known by ordinary people, are all in the law of heaven!
The old man said: "I used to be in the position of Beizheng, in charge of the number of steps and the range of the land. I need to understand the different divisions of the land in various places, so I thought of the numbering method made by Lishou, so as to learn and study. Later, the man named Shu Hai passed by and told us about the Pythagorean Number, thinking that he had obtained something worth studying, but unexpectedly, it turned out that it was only superficial here!"
Yan Zai also found it very interesting. Among the ancient ancestors, it was very rare to meet an old man who was obsessed with mathematics, but when he learned that the old man had once been the Beizheng of a large tribe, Yan Zai understood.
North is about to calculate a lot of miscellaneous things, land and population, including food and goods, daily production of pottery, tools, classification and division of spoils, etc., all of which need to be done by North.
Yan Zai thought for a while, and took out something from his backpack. This was a tool that Chongbo and the others in the south had already used.
Many special tools were used for the measurement of the Great Flood Control City!
The old man saw that "board" with many strings of beads on it
"This is called an abacus, and the method used is like this"
The ancients in this era probably used a combination of sticks and stones for calculation, which was the predecessor of the later "calculation chips", but the calculation chips are actually nothing more than some bamboo chips.
According to the "Shan Hai Jing", Dayu asked Shu Hai to measure the distance of the earth, and Shu Hai went out with some calculation chips. And Suanchou later derived an idiom, which is "planning strategies".
After the old man got the abacus and roughly understood some calculation methods, he was very excited.
On this day, Yan Zai lit up the mathematics technology tree in the Central Plains.
The little celestial master left with a lot of questions, saying that he would come to visit tomorrow, and everyone was invited by the old man to come to his residence. It was three self-built houses in the countryside, forming a small courtyard, next to the living area of ??other tribal peoples .
No one came to disturb the old man. It can be seen that the old man's status is not low. From the conversation, the old man told them that his name is "Julong".
This name is not very famous, and no one remembered it for a while.
Taking a rest for a day, the old man originally wanted to entertain them with wild boar meat that had been boiled three times, but Wen Ming took off the iron pot from his body, grabbed Gu Gu again, and put the "burning Gu Gu" under the iron pot , Stir-fry the wild vegetables directly in the air.
And at this moment, Chonghua finally remembered the true identity of the old man!
He almost didn't come up in one breath!
Julong In the Central Plains, Di Fangxun also set up a shrine for him to worship, but the official name of the sacrifice inside is "Houtu"!
Houtu in the Shaohao period!
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