Chapter 7 It's hard to graduate from elementary school like this
Prince Fan scratched his head in distress, "Equations? The eighth volume of Nine Chapters on Arithmetic? That volume is very complicated and I haven't mastered it yet."
"It's actually very simple. It will be much easier to understand if you change the way you write it." Li Chongrun knew that the word equation has been around since ancient times, but he did not expect that it actually comes from the famous Nine Chapters of Arithmetic. "After class later, I will bring a pen and paper to
You’ll understand after you write it down.”
"Thank you for your advice, sir."
Mr. Ye Wang, the boss on the stage, was talking about "Zheng Bo Duan Yu Yan" in "Zuo Zhuan". For some reason, his eyes always looked towards Li Chongrun intentionally or unintentionally. I don't know if he noticed that the two of them were whispering to each other, or there was something else.
.
"What do you know about the equations?" Li Chongrun has never had the opportunity to read the arithmetic classics. His previous arithmetic lessons at Helu Pavilion were just simple arithmetic such as addition, subtraction, multiplication and division. So he doesn't understand traditional equations.
What means.
After finally getting to the end of get out of class, Li Chongrun was dragged to the dormitory by the impatient Prince Fan. A book boy was cleaning, and before he could salute, he was hurriedly called by Prince Fan to prepare his pen and ink.
"What does the equation you know look like?" Before pretending to be cool, you need to understand the background. This is the experience and lesson Li Chongrun summed up after meeting Poet Chen.
"Multiply the middle row by the right row and divide by the straight row. Multiply the second row again..." Prince Fan began to recite the text, but he was very convoluted. The corners of Li Chongrun's mouth kept twitching as he listened.
"Actually, it doesn't need to be so complicated. What's the problem of one hundred chickens?"
"The rooster is worth five; the hen is worth three; the three chicks are worth one. If you buy a hundred for a hundred dollars, ask how much each male, hen, and chick is worth."
"There is no rooster, 25 hens and 75 chicks." Li Chongrun replied with great arrogance, "Why don't you even think about it?"
"Master Li, this question has more than just one answer."
"Oh, really? I was not paying attention for a moment, let's make an equation and do the math." He was careless and was slapped in the face. Li Chongrun felt that his cheek hurt a little. He took the pen and ink prepared by the book boy and said it politely.
Thank you, but the book boy was very nervous and quickly ran away.
"Let's assume that the rooster is
"Young master, no!" When Prince Fan saw Li Chongrun wanting to go to the bedside, his expression became very nervous. However, when he saw that Li Chongrun just took the fan, he seemed relieved and hurriedly changed his words and said, "This fan is from my hometown.
I use it to talk about homesickness on weekdays."
"Oh, it's so important, so I won't take it. I just wanted to find a feather to use as a pen."
"How can I write with a feather as a pen?"
"The writing brush is still made of weasel hair. Isn't it good for writing?"
Prince Fan asked the boy to get a broom for cleaning the bed. It was made of wild goose feathers and was very strong. Li Chongrun took one and thought about how he made quills when he was bored in elementary school. He sharpened it with a knife and cut it out.
Here comes the ink tank.
I dipped some ink in it and found that the writing was very smooth, but the ink was a bit thick, so I diluted it a little more. Then I wrote half a page on the paper.
But after Li Chongrun finished writing, Prince Fan was still shocked that this little brother had invented such stationery with just a wave of his hand.
"Hey, hey! The saliva is flowing out!"
"Then. How can there be!"
"Look at the question, isn't it just a pen, the details. If you master the equation I taught you today, don't worry about that fool making things difficult for you. Even if you want to replace it, it is not impossible."
"Master Li, what do these symbols... mean?"
"Oh, I'm used to shorthand symbols. Let me translate it for you." Li Chongrun, who was slapped in the face again, felt that he was really not suitable for showing off today.
He changed the Arabic numerals into one, two, three, and four, and changed the English letters he was used to into A, B, C, and D. Then he explained the equation to Prince Fan in detail. "Do you understand?"
Prince Fan did not speak, but shook his head in confusion.
"Prince, if you are like this, it will be difficult for you to graduate from elementary school..." Li Chongrun shook his head with emotion and simply threw away all the previous calculations and started teaching from the simplest linear equation of one variable.
"Master Li, there's no need to be so polite. Just call me Ubisoft."
"Ubisoft, you're welcome, just call me Brother Run. May I ask, Prince, if your country's specialty is potatoes?"
"What are potatoes? Our country's specialty is rice."
By the time Li Chongrun finished his lecture on linear equations in three variables, it was already time for the afternoon arithmetic class to begin. Even lunch was brought by the book boy from the dining hall, and the two of them ate in the Potato Prince dormitory.
It's just that Prince Fan still didn't understand the problem of the hundred chickens, and both of them were a little anxious. But when they walked to the door of the classroom, they met the student Wang, a child from the audience. They saw the two of them heading to the classroom with sad faces, and they were very surprised.
Come to greet me enthusiastically.
"What's so difficult about this? Is it possible that Dr. Wang with a mustache can ask you to check the calculation on the spot? Just memorize the answer and it'll be fine?" After hearing the two people's difficulties, kid Wang replied with disdain.
Li Chongrun felt that his IQ had been lowered by the prince whose name was very potato-like. For the sake of his own great cause, it would be better to stay away from him in the future.
"It's just that the equation you just talked about doesn't sound the same as the eighth volume of the Nine Chapters?" Little friend Wang must have memorized arithmetic scriptures on weekdays. After just listening to a few words, he understood the equations and books they talked about.
The examples in are not related.
But Teacher Huzi had already arrived, so the few of them said nothing and each found a place to sit, waiting for Dr. Huzi to start teaching.
Today, the beard was indeed talking about the Hundred Chicken Problem, and as expected, Ubisoft was called up to answer the question. Fortunately, the strategy proposed by Wang Rong just now worked very well. Ubisoft recited the four sets of answers fluently.
Dr. Beard didn't expect that this student who was usually poor at math would come prepared today. He was so shocked that he didn't even attend class. He angrily dropped a few questions as homework, then turned around and rolled his sleeves.
And went.
Prince Zhenla glanced at Ubisoft with a complicated expression, and hurriedly chased Dr. Beard.
Li Chongrun and Fan Yubi both breathed a sigh of relief. They thought that this obstacle was finally over. However, Wang Rong came over at this time and said, "Brothers, what is that equation you are talking about?"
Dr. Beard has left, and the other supervisors in the classroom are also happy and relaxed. They have already left. Li Chongrun thought that anyway, there were confiscated materials that he had written before in Ubisoft's dormitory, so he simply suggested taking Wang Rong to take a look.
look.
Fan Yubi's face looked a little unnatural, but she couldn't bear Wang Rong's desperate act of cuteness, so she could only reluctantly agree.
The three of them went over the morning's calculation process in front of the desk. There is indeed a gap between people's talents. It was different from teaching Ubisoft for two hours to talk about the three-dimensional linear equation. They just looked at it briefly.
After going through Li Chongrun's derivation process of the Hundred Chicken Problem, Wang Rong mastered the concepts Li Chongrun talked about very skillfully.
"The method is quite stupid, but this formula is very easy to use. A few additions, subtractions, multiplications and divisions can make complex problems simple. If Brother Chongrun comes to the Imperial College to teach arithmetic, I think the arithmetic of these idiots should be different.
It's so bad." Wang Rong was not old, but his tone was very old-fashioned. Suddenly he saw the quill pen made by Li Chongrun, and he was very curious to play with it.
"This is what I use. If you want it, make one yourself." Fan Yubi grabbed it nervously and held it in her arms like a treasure.
"Tch, you're even more petty than a kid like me." Wang Rong looked very disdainful, but after a while he couldn't hold back his curiosity and begged Li Chongrun to make one for him too.
That night, when Wang Siye came home from get off work, he saw that his usual treasures of big white geese were missing to greet him. Mr. Wang, who had a question mark on his head, hurried to the nest to have a look, but only saw a few big geese hiding in the nest and rustling. Shivering, the blade feathers that are usually very colorful at the tips of the wings are nowhere to be found.
Master Wang was about to get angry when he saw his little grandson hurried towards him holding a handful of feathers.
"Grandpa, grandpa, I learned a new thing today, it's very fun. You will definitely like it!"
Normally, Mr. Wang was used to indulging his grandson, and immediately lost his temper. He just thought it was just another child's play like playing shuttlecock and didn't take it seriously.
"Look, after cutting it and pulling it, it becomes a pen." Wang Rong excitedly presented the treasure to his grandfather.
"Using this thing to write? It's thin and dull, with no sense of roundness between turns. It can carry very little ink, and you have to dip it into the ink once to write a word, resulting in no coherent meaning between words...
"Wang Siye is a well-known calligrapher for a long time. He has very profound attainments in calligraphy. Naturally, he has very high requirements for the pen that he almost never leaves his hand.
"But it's easy to make and it's fast to write. It's very convenient when copying books or doing calculations." When children occasionally get a treasure, they naturally attach great importance to it.
Wang Siye pinched the thin goose feathers with his accustomed pen-holding method, which was very laborious, but suddenly he remembered the chopstick-like technique he used when he saw Li Chongrun writing poems that day. After a try, it turned out to be
Much more comfortable.
With some doubts, he ordered the old servant beside him to bring over Li Chongrun's manuscript that he had brought back that day. The quill flew in his hand, and in just a breath, he copied out a copy imitating his handwriting.
It's just that the quills are very thin. Although the shape is very similar, the size is much smaller. Each character is only about the size of a soybean.
Although Wang Siye is not too old, he just practices calligraphy every day and is already a bit presbyopic. After reading it several times, he still can't see clearly. He can only let someone hold a few more lamps and come out, and he gets closer and looks carefully.
one look.
His left hand, which was twirling his beard, trembled, and with a cry of pain, a few strands of his beard were pulled off.