The whispering in the classroom didn't last long.

Because Mr. Xu entered the house.

He held a test paper in one hand, touched his bald head with the other, and looked at the students in the room: "What are you discussing?"

A student replied to him with a smile: "Teacher, we are talking about the test papers." ”

"It's easy to learn about the test papers. Teacher Xu responded casually, walked to the podium table, threw the test paper on the table, and raised his hand to point to a boy: "Come, go to my office and move my chair." ”

He smiled and said, "A student just told me that there are no chairs in the classroom. ”

Teacher Xu looked around, his eyes quietly swept over the empty seats, and then pointed to the positions with a smile and asked, "Haven't the students here come yet?"

It's been a long time since a new person has come to the math competition class, and basically everyone knows how many empty seats there are in the classroom.

Mr. Xu asked knowingly.

The classroom fell silent.

The classmates in the room looked at each other for a while, and someone still said, "No one is sitting here." ”

Someone opened the first mouth, and the rest of the students couldn't sit still, and said in twos and threes: "There is no one on my side." ”

"I'm here too. ”

Teacher Xu looked around with a smile, and then his face suddenly sank: "Since there is no one, why do you tell the new classmates that there are no seats?"

There was no sound in the classroom again.

Teacher Xu grabbed the thinning hair in his ears: "You group of Class A students." ”

He sighed heavily: "It's just that the heart is arrogant." ”

After Mr. Xu finished speaking, he saw that the person who had been called to move the chair had not left, and frowned again: "Why don't you move the chair yet?"

The student was stunned: "Isn't there a seat, why do you have to move-"

Teacher Xu gave him a smile: "You dislike others, don't you allow others to dislike you if you don't sit on them?"

He waved his hand impatiently: "Go, go, move the chair." ”

The boy walked out of the classroom and quickly moved the chair back, and Mr. Xu pointed to a place and asked the boy to put the chair down, and then beckoned outside: "Come in." ”

He pointed to the chair that didn't fit in with the classroom: "Sit here or there?"

Teacher Xu pointed to the empty seat again.

Teacher Xu helped her get angry, and she should also sell Teacher Xu a face.

Shao Qing laughed: "Sit down." ”

She walked to the nearest vacant spot, pulled out a chair and sat down.

Teacher Xu glanced at her, nodded, and then picked up the volume: "Come on, come on, start today's lecture." ”

The math competition class lasted for two hours, and the time was not enough, and the time was even tighter because of the delay at the beginning.

Mr. Xu spoke very quickly, and the slightly simpler competition questions were all about mentioning the core idea and finishing it.

He quickly finished the whole paper, and then pressed the paper on the table: "As for the last big question, I am talking about the standard answer, and there are a few common solutions. ”

Teacher Xu raised his hand: "They are all relatively easy to think of, but they are very troublesome to calculate, do any students think of other solutions?"

The students in the classroom looked at each other.

The last question is very difficult, even if it is the solution that Mr. Xu said is "easier to think", most of them have not thought of it.