"Multiply (or divide) equal non-zero numbers or equations on both sides of the equation at the same time, and both sides remain equal.

If a=b, then there is a×c=b×c or a÷c=b÷c(c≠0)"

Yang Yi lit the black wooden board with the lime in his hand, looked at the dozen or so children sitting below, and said: "This is the most basic equation application, combined with the knowledge we learned some time ago, who will give me an example?" ”

Liu Xiaoduan, who was sitting in the front row, raised his hand and said, "Sir!" I got it! ”

Yang Yi nodded and motioned for Liu Xiaoduan to come up.

Liu Xiaoduan smiled, stepped forward in two steps, took the lime in Yang Yi's hand, and wrote on the black wooden board while reading: "A=3+5,B=8,C=3Then (3+5)X3=8X3."

After writing it, Liu Xiaoduan read it carefully twice, and then returned the lime to Yang Yi and walked down.

Yang Yi nodded with satisfaction and said, "Yes, Xiaodian has made great progress recently, which is worthy of praise." ”

Liu Xiaoduan was praised by Yang Yi, grinning, and the friends on the side admired and praised, some were unconvinced, and some were frowning and still thinking about what Yang Yi said.

These dozen or so children are all children of high-ranking officials and generals in Shuzhong, and Yang Yi set up a very special academy for them in order to experiment and promote the teaching content and methods of the previous life, named Guangming Academy.

In Guangming Academy, the children's learning content and methods are different from all academies in this era, integrating most of the cognitions in Yang Yi's memories in his previous life, from knowledge content to thinking expansion, Yang Yi himself is at the helm in the direction.

These children are also very smart, and so far they have mastered Arabic numerals and twenty-four English letters, as well as some of the most basic modern knowledge, so that Yang Yi, a teacher who is indiscriminately full of numbers, can't help but be a little happy.

In Yang Yi's view, these children are not only the future of Shuzhong, but may even become the future of Daguang, and even the future of this world, they are a piece of white paper, and what kind of color they can draw can only depend on themselves.

Yang Yi calculated the time, this class was almost half an hour, put down the lime in his hand, and said, "That's all for this lesson, let's go back and review the use of equations today." In addition, tomorrow if nothing else is expected, I will come to give you a physics class, when the time comes, I will teach you how to make a simple tumbler and explain its mechanics, and everyone will go back and prepare eggs, glutinous rice and some sandstone. ”

"Oh!! All right!! ”

"There's another experiment to see tomorrow, that's great!"

"I'm going to be a tumbler!"

These children who have never gotten to play like Yang Yi to give them experimental lessons the most, and Yang Yi will always show them a lot of surprises.

Yang Yi also ignored this group of cheering little cubs, patted the white ash on his hands, turned around and walked out of the class, and there was a figure standing next to the window of the class, looking at him with a smile, it was Li Yu in plain clothes.

Since Yang Yi started the class, Li Yu stood quietly by the window and listened, and she didn't know whether she was watching Yang Yi or the equations Yang Yi taught.

Yang Yi came to the window, looked at Li Yu and said, "Why don't you go in and sit?" ”

Li Yu smiled: "I heard that you don't allow others to disturb you when you teach. ”

Yang Yi nodded and said with a smile: "If you want to listen to the class in the future, you will go in and listen, standing at the window is strange, it reminds me of our homeroom teacher..."

Only students who have experienced compulsory education know how terrible it is to be when the head teacher appears silently at the window.

"Head teacher?"

"It's the gentleman who used to manage us."

"Isn't that the old master Qiu of Guozixue?"

Yang Yi smiled and said, "No, it's someone else." ”

As the two of them spoke, they walked outside the academy, and Li Yu asked, "Those strange numbers you talked about and what letters did you say teach you?" ”

Yang Yi nodded, acquiescing.

After thinking about it carefully, Li Yu shook his head and said, "I haven't heard of any new learning from a great Confucian recently." ”

Yang Yi smiled and said: "My gentleman is a master of the world who lives in seclusion outside the mountain, I'm afraid you won't have a chance to see it." ”

Li Yu suddenly said: "Then your teacher is really a strange person. ”

"Why?"

"How else could I teach a weirdo like you?"

Yang Yi smiled: "Neurotic, I also have two eyes and one nose, what's wrong." ”

Li Yu stared at Yang Yi and said: "Not only are you sometimes weird and think strangely, but the way you govern Shuzhong is really incredible, I have seen many novel things in Chengzhou Mansion recently." ”

"For example?"

"If you want to get rich, you must first build roads."

This sentence was one of the biggest factors in the rapid development of New China in Yang Yi's previous life, and it was also a thing that developing countries must do, but in ancient times, such a way of governing was absolutely unique.

Yang Yi shrugged his shoulders and said with a smile: "What's so strange about this, the development of economy and culture is inseparable from transportation, and when transportation is convenient, exchanges in all aspects will be more frequent, and development will naturally be accelerated." ”

Li Yu nodded thoughtfully, as a strong woman, the eldest lady of the Nanguo Hou Mansion, she is no stranger to politics, and she faintly feels that Yang Yi is very relaxed, but the profound meaning contained in it is extremely profound.

Li Yu saw Yang Yi staring straight at him, his pink face flushed slightly, and said, "I'm just a little curious." ”

Yang Yi said with a smile: "As long as you want to know and like to understand, I will tell you, and the entire Shuzhong is also unimpeded for you, but in my opinion, men and women always have to divide the work, and it is difficult for one person to take care of the family and the country, so there are only two people coming." ”

Li Yu was stunned for a moment, naturally understood the meaning of Yang Yi's words, and nodded silently.

Yang Yi couldn't bear it, these words themselves went against his own intentions, in fact, he was not qualified to show his machismo to Li Yu now, the reason why Yang Yi said this was very simple, he didn't want Li Yu to be involved in too many political affairs, and he didn't want Li Yu to face a dilemma in front of him and Li Cen one day in the future.

Li Cen is using his daughter to pursue interests, but Yang Yi will never use his wife to do so.

Neither of them spoke again, as if each had their own agenda, and walked out of the academy side by side.

"Your Highness!"

As soon as he arrived at the door, Yang Yi was about to get into the carriage and go home, when the commander of the Chengzhou Army made Ma You gallop over.

Yang Yi stopped his steps, and before he could speak, Ma You turned over and dismounted, walked quickly to Yang Yi, and said in a low voice: "Your Highness, something has happened to Wuzhi Mountain!" ”

Yang Yi frowned, and his right hand on the edge of the carriage trembled slightly.

Before thinking about it, Yang Yi turned to Li Yu and said, "You go back first, I'm going to go into the mountains." ”