Zhao Huan asked Li Gang and Liu Yi to come up with a set of textbooks that were not so jerky and difficult to understand, the kind of textbooks suitable for cultivating from childhood.

Li Gang came up with a book on mechanical principles, and made some simple elementary subjects of mechanical structures such as levers, connecting rods, cams, gears, and spirals.

There is also an intermediate subject of the slightly more complex mechanical principles of intermittent motion, and Zhao Huan believes that the primary level can be learned by children over the age of 14, and the intermediate textbook is suitable for students over the age of 17.

As for the mechanical principle of the advanced version, Li Gang is still groping.

In the case that pure mechanics has not yet begun, applied mechanics has been studied a lot.

Liu Yi, who has been baptized by the same text arithmetic finger, now has a very rich mathematical tool in his hand, and has compiled a set of textbooks suitable for the age of six to fourteen like Li Gang, and textbooks for those over the age of fourteen.

Zhao Huan exchanged two math books and physics books for junior high and high school in later generations, and let them study them, pure theoretical science, these things are too difficult to study and understand.

When Li Gang received the books mailed back from Yanjing, his eyes were full of despair, did he offend the big officials of the Zhao family?

He's busy, he's in the auxiliary country!

It's really too much energy to study these!

Of course, Li Gang and Liu Yi didn't dare to discuss Zhao Daguan's family, so they threw their anger on Zhao Chen's child, who was only nine years old.

"There's a patch of grass on the pasture that grows just as fast every day. This grass is fed for ten cows for twenty-two days, or sixteen cows for ten days, during which time grass grows. If you feed twenty-five cows, how many days can you eat them? ”

Zhao Chen bit his pen and looked at Liu Yi sitting in front of the stage, looking at this question painfully, he really wouldn't.

"Master, what to do?" Zhao Chen took the blank answer sheet and gave it to Liu Yi, Liu Yi took a look, took out a ring ruler, and said, "Stretch out your hand." ”

Yue Yun, Yu Wenzhong and Zhao Chenfu stretched out their hands together, looking at Liu Yi with blank eyes, this question is really difficult, they won't do it.

Even the smartest Zhao Chenfu wouldn't.

Liu Yi laughed wildly in his heart, this was sent by the official family of the Great Song Dynasty from Bianjing, specifically to embarrass him Liu Yi!

Fortunately, Liu Yi had a few brushes of his own, and he was almost frightened by this cloudy question.

However, under his equation, it only took a moment to make it, but the mathematical ideas in it still made Liu Yi take a step forward.

"Forget it, put your hands down. Let me explain it to you. Liu Yi smiled and asked a few people to retract their hands.

"To solve this kind of problem of trade-off, we must first clarify the basic characteristics, the amount of raw grass and the growth rate of grass are constant, and if we find this basic characteristic, we can find out two constant quantities from this problem." Liu Yi wrote two quantities on the blackboard.

Yue Yun didn't like math very much, he looked up at the window, and the birds on the branches outside the window were chirping non-stop.

He swears, and he just looked.

As soon as I turned around, I saw Liu Yi writing two commonly used formulas and four basic formulas on the blackboard.

"Yue Yun, repeat what I just said!" Liu Yi stared at Yue Yun very seriously and said.

"I don't know." Yue Yun is an honest child, and honestly admits that he was distracted in class.

Liu Yi's ring ruler slammed, and with the sound of breaking the air, it landed on Yue Yun's palm.

"Smack!"

"Hiss......" Yue Yun shook his palm, quickly sat down, and listened carefully to the class, Liu Yi was a very good teacher, he re-sorted out the quantitative relationship, and said: "Okay, from this, we can easily get, twenty-five cows, it takes five and a half days to eat these grasses." ”

"Master, what's the use of us learning this?" Yue Yun boldly raised his own questions.

Liu Yi glanced at Yue Yun, and he was completely consistent with the questions raised by the group of scripture doctors in the court.

These questions are completely out of touch with reality and are completely useless.

Zhao Huan named this kind of mathematics pure mathematics, and called the practical one applied mathematics.

"When you plant trees, do you dig pits?" Liu Yi asked with a smile.

"Planing." Yue Yun said quickly.

"When you plant trees, do you water them?"

"Watering."

"When you plant trees, do you want saplings?"

"Yes."

"When you plant a tree, do you plant it in the sky?"

"No, I'm going to die of drought."

"That's right, no big tree in the sky can not stand on the earth, the mathematics we are learning now is pure mathematics, and their role is to exercise our thinking and logical ability."

"Then let the big tree of mathematics grow strongly, and the fruit that bears fruit is applied mathematics." Liu Yi asked Yue Yun to sit down, looked at him and said.

"Specialized in mathematics itself, not for the purpose of practical application, is pure mathematics, the study of the internal relationship of mathematical laws abstracted from the objective world."

"It can also be said that pure mathematics is the study of mathematics itself. Making mathematics our tool to solve practical problems is what we are learning for. Liu Yi finished his words and continued today's lesson.

The concept of pure mathematics is not mature, it is just a simple summary in Zhao Huan's answer to Liu Yizazi, and he summarized it.

He said that children may not be able to understand this, but they may not necessarily understand it, as long as they know that what they have learned is not useless.

Li Gang sat in the court, and today he was not facing the courtiers, but facing the doctors in Taixue and Guozijian, these doctors were a group of old scholars.

It is too difficult to change their thinking, and the improvement of various weapons in the ordnance supervision that Li Gang is in charge of is the application of mathematics in practice, and it is really a bit difficult to explain these things to this group of old scholars.

Today, this group of doctors finally came to the door and asked Li Gang for an explanation, whether this textbook is a textbook from Taixue, or use your Li Gang's textbook.

"Here are the words today! This new school is promoted by the government! This textbook is ordained by the government! If you want to find someone to reason, go to the official family! The official family is in Yanjing! The fast train will arrive in ten days, and the slow twenty days will also arrive! ”

"Xinxue is these textbooks! It must be implemented! Li Gang slapped the holy decree on the table and walked away.

The doctors of economics looked at each other, they thought that their old qualifications could sit down with Li Gang and discuss whether there was room for revision of these textbooks.

As a result, Li Gang didn't give them a chance at all.

Li Bangyan stood at the door of the Wende Palace, and he bent over with a smile.

He walked in and said with a smile: "The textbooks are all here, and the Great Song Book Company has printed them, you have to learn them yourself, so you can teach the students, and quickly take them back to study and study." ”

"And Mr. Xixi, who is a labor relief supervisor, is the same reason, the new school will be fully popularized in three months, and if Mr. Xixi is asked in class, it will be a shame."

Li Bangyan let the doctors of scripture leave the Wende Palace, Li Gang clearly played hooligans, and carried out the official family to suppress them, if they did not comply, they would be disobeying the holy order!

This is what a ruler should look like, everything has to be carried down by himself, so what are you doing with the big killer weapon of the official family?

Of course, the doctors of scripture did not have the courage to go to Yanjing and ask the officials to reason.

According to rumors, there are many displaced people there, and there are swords and soldiers everywhere, and they dare not go to the muddy waters.

This newly learned textbook spread to all parts of the country of the Great Song Dynasty at the fastest speed, and it was impossible for the Great Song Book Company alone to complete the printing of these books, so naturally the bookstores in various places actively cooperated with the publication and unified the content of the teaching.

When Zhao Huan received Li Gang's notebook, he also smiled, this Li Gang finally learned to use the emperor to take the blame.

However, Zhao Huan hummed a little song, walked out of Yanfu Palace, and walked towards the market on the left side of the imperial city.

On the left side of the Yanjing Palace, there is a street is a bazaar, where almost all the goods in the world are gathered, merchants and merchants gather, Zhao Huan's activity today is to follow Zhu Lian to go shopping.

Yanjing is different from Bianjing, almost no one knows him here, so he arranged for some personal officials to follow, and he didn't clear the scene, so he walked out of the palace through the side door.

Zhao Huan stood at the head of this street and looked at the end of the street, bustling and rubbing shoulders, feeling comfortable for a while.

He did not get rid of his decree, and after a slight increase in the price of grain in the Great Song Dynasty, it stabilized again, and the price of grain in Yanjing and Bianjing only rose by half a percent.

It has risen from two yuan and a pound of rice to two yuan and a dime a pound of rice.

Yuwen Xuzhong and Zhao Huan both underestimated the heritage of the Great Song Kingdom.

This is a country with a population of nearly 100 million, and the people of this land have created the most prosperous eastern world in the world with their industrious hands.

And this prosperity is still multiplied by the prosperity of nearly 100 million people under the strict exploitation of the squire and landlords.

At that time, the population of Europa was less than 50 million.

Under Zhao Huan's more than a year of land reform and commercial reform, this time millions of people were admitted to the customs, and there were no waves at all, like water droplets flowing into the sea.

This time, the Northland refugees received a total of 2 million people, an increase of only 2% compared to the population of 100 million in the Great Song Dynasty

Zhao Huan breathed a sigh of relief at this, he was afraid that what Yuwen Xuzhong said would become true, but fortunately, the result was very happy.

Zhao Huan understood what a great unification dynasty was, and the content of this great unification and unification was too much.

It's a whole.

"The smoke and rain look for spring traces, the earth accepts aura, the flowers compete with each other, and the prosperous era looks at the present." Zhao Huan was ready to step into the bazaar and take Zhu Lian to go shopping.

Isn't it a pity that you can't fit into the prosperous scene?

When Zhao Huan took the first step, countless personal officials ran to the front from behind him, cleaning up all the people on the street.

Zhao Huan looked at this scene in a daze, he turned his head and glanced at Shen Cong, these four words were completely in line with Shen Cong's every move now.

You look a little reckless, okay! You see it's Shen Cong who cut down Jin Guodongshuai!

"Official, please, it's cleared." Shen Cong looked at it for a moment and said with a smile.

"You're all running away, what's the point?" Zhao Huan was angry and said with a smile.

Shen Cong bowed his head and said: "The official family, if the people accidentally collide with the official family, it will also be a disaster for the people. The official family, after all, is the official family. ”

The reason why Shen Congqing was to protect Zhao Huan and the people was also to protect the people.

Who made Zhao Huan's identity so special?

The word emperor, like a mountain, pressed on everyone's heads, even if the people respected him and blindly obeyed him, Shen Cong did not want Zhao Huan to take risks.

"Well, you have a point." Zhao Huan sighed, I am afraid that the opportunity to have fun with the people in this life is gone.

"Be careful." Zhu Lian said suddenly.

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