"Who?" Lin Chaoxi was not sure.

Xie Ran was stunned for a moment, and said, "Your family seems a little strange. Don't you know what your father did before?"

“The park manager.”

"What about before this?" Xie Ran thought, "Don't you think it's strange, Mr. Lin... that... a person like that works as a park manager?"

Lin Chaoxi wanted to laugh. What does "so... alone..." mean? Xie Ran's evaluation of Mr. Lin is very interesting, but she still said: "Everyone has their own aspirations. Mr. Lin is a calm person by nature. He wants to be a free and easy person."

"What a wild crane."

Speaking of Lao Lin, Teacher Xiaojie no longer has the leisurely and calm demeanor he had before, and it seems that there is still some shadow in his heart.

"Teacher Xiaojie... you have a lot of opinions about Teacher Lin." She moved her eyes to the book in Jie Ran's hand and asked, "What's going on? Teacher Lin taught at Sanwei University. How do you know?"

"Xiao Lin, don't you know about Teacher Lin's situation?"

"I really don't know." Lin Zhaoxi said.

"Then I can tell you one thing. The training camp originally wanted to invite him to be the head coach, but he refused." Xie Ran paused and added, "Very decisive."

Lin Chaoxi was stunned. She couldn't help but think of the phone call after the exam. Old Lin also strongly opposed her coming to Yongchuan High School.

Old Lin from Strawberry World doesn't have that many "demons" about Yongchuan...

"So what I said was correct, right?" Jie Ran said meaningfully, "Your family is still very strange."

——

As they were talking, they arrived at a study room on the top floor of the library.

The leader sister pushed open the door, and a group of junior high school students walked in chattering, each finding a seat to sit down. Jie Ran put the book back in her hand, straightened her clothes, and walked up to the podium.

Lin Chaoxi stared at Jie Ran's back in amazement, and was very shocked by Jie Ran's shameless attitude of "I won't tell you gossip unless you share it with me."

Xie Ran stood on the podium and wrote his name on the blackboard.

He looked like a college student, but he looked younger than he was three years ago. "Good afternoon, classmates. Sister Xiao Yan has just introduced me..." He tapped the blackboard. "My name is these two characters. I am currently a graduate student in the Department of Mathematics at this university. I will also be your homeroom teacher this year."

"Hello, Teacher Xiaojie."

"The teacher is so handsome~"

The more lively students present shouted in twos and threes.

"Although our class is a temporary class and we only see each other a few times a year, we still need to introduce ourselves and get to know each other according to the normal class process." Jie Ran pointed to the first row, "Let's start with you."

"We don't want it."

“Self-introductions are so old-fashioned.”

"What's there to say?"

"Isn't that word pronounced jie? Does xiaojie mean pee?"

As luck would have it, the first people Xie Ran pointed out were the Yongchuan University quartet.

Lao Wang, A Guang, Lion and Tiger each spoke a sentence, and the last "jie (xiao jie)" made the whole class burst into laughter.

Lin Chaoxi couldn't help but smile secretly. Junior high school students are different from elementary school students. They are very rebellious and difficult to deal with.

Xie Ran was still smiling, his eyes flickered as he called out, "Student Lin Chaoxi~"

Lin Chaoxi stood up quickly, and all eyes in the class were focused on her. She hadn't expected that when she was just feeling lucky for a moment, Jie Ran would actually call her up alone?

"We are old friends. Please introduce yourself and give a demonstration to these four students," said Xie Ran.

Upon hearing this, the four-member group from Yongchuan Middle School were immediately furious.

"We don't need a demonstration!" the little bald guy shouted first, "My name is Chen Youguang, and I'm from Yongchuan Middle School."

"An Hu, I'm also from Yongchuan Middle School."

"I'm Shi Ziyang, and I'm from Yongchuan Middle School."

"Wang Tianlong, he is from Yongchuan Middle School."

They quickly reported their names and schools, fearing that they would be "exposed" if they were late.

Everyone in the class started laughing again and the atmosphere was very good.

Lin Chaoxi sat down quickly. He felt that after not seeing him for three years, Teacher Xiaojie's ability to control the situation had improved significantly.

——

The next part of the self-introduction went much more smoothly. Most people stood up and said their names and schools. Of course, there were also some students who liked to show off and some who were serious. They introduced their names, schools, hobbies, and strengths in detail, and expressed their "sincere" desire to serve their classmates.

Xie Ran asked the classmate "Chen Chu" to take a seat. Now the junior high school students are really smart. They know that the next step after the self-introduction is to select the class monitor, so the more they perform in front of the group, the better.

When the last student who introduced himself sat down, the class became quiet again.

Xie Ran looked at those little faces that had become very bored, picked up the chalk on the table, erased his own name in the center of the blackboard, then put one hand in his pocket and began to write.

“Is this the topic?”

"Is class about to start?"

Hearing the children's whispers behind him, Xie Ran continued to write. When the noise reached its peak, he wrote the last period, turned around and said with a smile: "Answer the question first, raise your hand."

"Teacher, do we start with the exercises right after we get here?"

"Are you plotting something?"

All the students present were top students. Some of them immediately took out pens and papers, but some difficult kids refused to give in.

"What else? My classmates are all grown up now. It would hurt our relationship if we had to take exams right away."

Having said that, I will not explain further.

He began to patrol the entire class, but was very surprised to find that the four children from Yongchuan Middle School who were noisy just now all fell silent after he finished writing the questions.

They had a thoughtful expression on their faces, then they each picked up a pen and began to answer without saying a word.

In comparison, students who are still asking “What’s the benefit of the teacher answering it?” seem less cute.

"It's not a big deal." Xie Ran put his hands in his pockets and shrugged. "But you've all already registered your own school's name, so just think of it as bringing honor to your alma mater. It's quite prestigious to be the first to do it in front of so many top students in the province."

The topic of honor instantly inspired the middle school students present, and finally a few of them picked up their pens and began to answer the questions.

Xie Ran went to see Lin Chaoxi on purpose. Just like the other kids from Yongchuan Middle School, the girl started calculating quickly after he asked the question.

Her neck was lowered, and her long, white fingers were holding a pencil. It seemed that she had an idea and was trying to solve it. After all, she was a child who had experienced that cruel and weird summer camp in elementary school. It had become her instinct to solve the problems as soon as she was given them.

That sense of focus and fight is something I miss.

Xie Ran shifted her gaze to the right and looked at the boy next to her. After not seeing him for three years, Pei Zhi looked even more handsome and upright than a young man.

However, the moment he looked at Pei Zhi, Pei Zhi turned his pen around, raised his head, and looked at him with clear eyes.

Xie Ran smiled and mouthed: "What?"

Pei Zhi said nothing, but just turned the pen around again. Then, he gently put the pencil down.

——

The topics are as follows:

Two brothers sell a flock of sheep. The price of each sheep is the same as the number of sheep in the flock. Then they divide the income in the following way: the elder brother takes 10 yuan first, the younger brother takes 10 yuan, and then it is the elder brother's turn to take 10 yuan, and so on. At the end of the distribution, it is the younger brother's turn, but he finds that there is less than 10 yuan left, so he has to take the remaining money. In order to be fair, the elder brother gives the younger brother a knife, and its price is an integer. Please ask: How much is this knife?

One minute later...

Three minutes later...

Xie Ran crossed his arms and watched. Just as the minute hand was about to make another circle, someone finally raised his hand.

"Student Lin Chaoxi, it's very quick." Xie Ran said loudly.

Many students in the class were interrupted and stopped writing, looking at the girl who raised her hand. But the four middle school students closest to Jie Ran were still concentrating on their homework, immersed in it.

Lin Chaoxi pursed her lips and looked at Pei Zhi with some surprise. The two exchanged glances, Pei Zhi nodded, and Lin Chaoxi slowly stood up.

"What's the answer?"

"Two dollars?"

Jie Ran was a little surprised.

At this moment, the whole class was silent again. Most of the students raised their heads and looked at him with uncertain eyes, waiting for the answer.

“Yes.”

“The answer should be 2.”

"How come you are so fast!"

But before he could open his mouth, the four students sitting in the front row started talking to each other.

There was a small noise in the class.

Xie Ran's voice drowned out the noise. He looked at Lin Chaoxi and said, "Tell me about your solution."

"At first glance, this question doesn't give enough information. It starts out by talking about sheep, and then suddenly asks how much a knife costs. It seems like a joke."

"But what is it really like?"

"In fact, if we translate this question into mathematical language, we can see a lot of hidden information."

Lin Chaoxi paused, subconsciously looked down at the old book on the table, then looked up and continued: "We can find that the price of the knife depends on the number of sheep, which is the only independent variable in the question. Let's assume that there are x sheep here, then the total price of the flock is x squared. And suppose that the younger brother took out 10 yuan n times before taking the money, and the change is a, the whole formula becomes..."

Jie Ran turned around and wrote down the answer that Lin Chaoxi read out on the blackboard.

x square = 10n + 10 + 10n + a = 10 (2n + 1) + a

"Then let the price of the knife be b. We need to build an equation that relates the price of the knife to the price of the change..."

Xie Ran wrote the second equation on the blackboard according to what Lin Chaoxi said.

"There are still too many unknowns. We can take the modulus (20) to eliminate n. The next problem is a pure mathematical problem..."

The students present were all very smart, and many of them just needed time to solve the problem. When Lin Chaoxi talked about taking the model, the problem was no longer difficult for them, but they still listened carefully to all the solutions.

"What do you think?" Xie Ran asked.

“It’s actually quite simple.”

“It takes a little time to think.”

“Grasp all the details of the information in the question.”

"There are also details in the equation that need to be grasped."

After hearing this, Xie Ran looked at Lin Zhaoxi and asked, "What do you think?"

Lin Chaoxi showed a thoughtful expression, and then said: "Two points, first, don't be afraid, and second, translate the text problem into mathematical language as soon as possible."

"This is the first lesson of today - math problems. Please think in mathematical language." Xie Ran put down the chalk with satisfaction, looked at Lin Chaoxi and said, "You are good. Then you can be the class monitor." He said.