As soon as the students heard the teacher say that after class, they should go to the toilet and play soldier ball.

Soon there were only two people left in the classroom, one was Fang Song and the other was Su Xiaoyu.

As for what Fang Song was doing, apart from sleeping, he really couldn't think of what else he would do.

Su Xiaoyu was reading hard to find the words in the homework assigned by Teacher Lu.

Soon Su Xiaoyu found it all, Teacher Lu said that he couldn't copy it, and Su Xiaoyu just wanted to write it.

The bell rang for class, and it was a math class.

As soon as the class bell rang, the students who were playing ran to the classroom one by one.

As soon as the scumbags returned to the classroom, the first thing they did when they sat down was not at the blackboard, but at the textbooks on the desks of their peers and others.

It was a math book, so the scumbags also took out the math book, and after a while, the math teacher came. And it's a woman.

The math teacher directly said "class"

As the squad leader, Fang Song immediately "stood up"

"Hello students"

"Hello Teacher"

"Students, please sit down"

The words "thank you, teacher" are already familiar to everyone.

"You turn to page eight of the textbook, which is what we are going to study today."

The students were a little unresponsive because the teaching method of Chinese class was different from that of mathematics class.

However, Su Xiaoyu had already reacted and turned directly to the eighth page.

The math teacher doesn't need to introduce himself directly, "What we are going to learn today is positive and negative numbers"

"These positive and negative numbers are closely related to our lives......"

When I heard it, I found myself listening to astronomy. And Su Xiaoyu listened very seriously. I also asked the teacher from time to time.

"Teacher's positive and negative numbers, is it the opposite?" Su Xiaoyu asked directly.

When the math teacher hears it, "Yes, it's the opposite, the so-called integer is greater than zero, and negative numbers are less than zero." Do you understand? ……”

Su Xiaoyu nodded, and then the math teacher asked the students, "Do you know what zero is?" Is it positive or negative? ”

A group of people were stunned, it is greater than zero and negative is less than zero, but what is the number of zero, as long as you are not stupid, you know that zero is not a positive number or a negative number.

But what is the number of zero, a group of people shook their heads, indicating that they were not awake.

As for Fang Song, don't mention that you asked your math teacher to come into the classroom and say a few words, and he fell asleep.

And he was the only one in the class sleeping, and the math teacher quickly noticed Fang Song.

The math teacher walked over to Fang Song's desk and patted Fang Song's desk.

Fang Song still didn't wake up, so "I'm out of class, I'm up"

I didn't expect the math teacher's trick to work, "What's your name?" ”

Fang Song didn't wake up and replied, "Fang Song"

"Then I ask you, is zero a positive or negative number"

"Ah, Zero? Xia Lan that. It's not positive or negative, it's zero. ”

A group of people all looked at Fang Song with exaggerated eyes, thinking that Fang Song was really powerful, he could still answer questions when he slept in class, and it seemed that there was nothing wrong with the answer.

Seeing that Fang Song's answer was quite good, he said, "Be serious in class, you can see that you are sleeping." ”

"Okay, let's use symbols to represent positive and negative, this symbol you all learned in elementary school, I'll talk about it roughly. The sign of this negative number can be subtracted by minus, positive number, and sometimes it can be without a sign, do you understand? ”

The classmates still didn't seem to understand, but they also replied, "I understand." ”

The math teacher scribbled on the blackboard a few questions about these positive and negative numbers.

"Here's your homework for today," the math teacher looked at the clock.

"Copy it up, it's homework." So the students took out their books and paper and copied them.

There is probably one more point that has not been copied and the bell rings after class.

"After class" After saying that, the math teacher packed up and left.