"Don't write yet, look up at the blackboard." The math teacher stood next to Nineteen Nian, holding chalk, and explained the example problems to everyone.

"As we mentioned earlier, in the addition and subtraction of rational numbers, we usually add positive numbers and positive numbers together, and negative numbers and negative numbers together. Using the method we just talked about, let's calculate Example 1. The math teacher drew a horizontal line under the number thirty-four and the number one hundred and fifty-six, "then, we get thirty-four plus one hundred and fifty-six......

After listening to a little bit of what the math teacher said, Nineteen Nian thought in his heart for a while.

She decisively wrote under the title 57+(-87)+(-42)+(-23)

Looking at the first formula she wrote, she wanted to ask for others rather than herself, and sure enough, at a critical moment, no one was more reliable than herself.

However, by the time she finished writing the formula, the math teacher had already told her about the results of the problem.

Oh my God! How to convert the latter one.

Looking at the math teacher who had finished talking about the topic, Nineteen Nian became more and more anxious.

The more urgent I became, the more I couldn't think of an answer to this question.

The math teacher ignored her, she turned around and put down the chalk, and said to the students, "The second question is a little difficult, give everyone three more minutes to check it." ”

Nineteen Nian breathed a long sigh of relief.

She didn't know that the second question was actually not very difficult, and the math teacher was just giving her more time.

Because she saw that she had written a conversion, she thought she would.

It is equal to 57 + (-45) + (-23), which is converted to equal to 57 + 22, and the result is equal to 79.

In accordance with the method she used, she quickly got the problem done.

Nineteen Nian threw the chalk head into the chalk holder, patted the chalk ash on his hand, and walked off the podium.

"Nineteen thoughts, you come out for a moment." Before she stepped off the podium, the math teacher asked her to go out with a serious face.

Nineteen Nian was still thinking about what he was called out by the teacher to talk.

As a result, Nineteen Nian walked out of the classroom, and Huo Wuwu was also called out.

Math teacher: "Huo Wuwu, you can also come out." ”

The two men were sadly called out of the corridor and talked alone.

The math teacher asked the two of them, "What are you two passing on in class?" ”

Huo Wuwu lowered his head, looking very unnatural.

"I didn't pass on anything, but her pen ran out of water, and she asked me to borrow a refill." Nineteen Nian randomly found a reason to prevaricate the teacher.

Otherwise, she still explained that she was playing palace fighting with Huo Wuwu in class?

The math teacher didn't believe in Nineteen Nian's rhetoric at all, and she had heard many such lies after teaching for more than ten years.

She said to the two of them, "Can it take that much time to borrow a refill?" How can I see that both of you are borrowing refills for a class? ”

Huo Wuwu shook her head, she lied with her own liger, "She borrowed my refill and didn't get water, so she delayed a little longer." ”

"The refill doesn't go into the water?" The math teacher still didn't believe what the two of them said, she glanced at Nineteen Nian, "You go back and bring the exercise book for the two of you to pass on." ”

What the! After listening to her math teacher's words, she was shocked.

The exercise book is full of Gong Dou's content, and once the math teacher finds out, the two of them will definitely die.

Before leaving, Nineteen Nian said to Huo Wuwu Do you have any extra exercise books? Lend me one for use.

Huo Wuwu shook her head, she meant that she didn't have any extra exercise books either. Nineteen Nian walked back to the classroom, she didn't want to give up, but asked the two classmates in the back.

"You two don't have used exercise books either?"

"There's a new book." A classmate at the back table took out a brand new exercise book from a drawer and was about to hand it to her, but Nineteen Nian gave it up.

She asked them both, "Don't you have an old exercise book?" ”

The classmate at the back table took out an old exercise book from the mezzanine of the book, and she said to Nineteen Nian, "Is it okay to take notes in the exercise book before?" ”

Nineteen Nian changed and put forward a new condition: "Don't you two have that kind of exercise book that has passed on small notes?" ”

"An exercise book with a small note?" The two classmates at the back table were confused by her question, "Is there still such an exercise book?" ”

"Forget it. I don't take it. She had to give up.

Worried that the teacher would suspect her if she delayed too much time in the class, Nineteen Nian had no choice but to pick up the exercise book she had used when she had just passed the note to Huo Wuwu, and the thin book looked extremely heavy in her hand. Nineteen Nian even slowed down her walking speed a lot, and she walked out of the classroom slowly.

In this short interval, she came up with many reasons to explain.

The two of them are copying a little game from their phones? No, with this reason, you will definitely suffer even worse, and you still talk and play with your mobile phone in class, isn't this looking for death?

The contents of the notebook were written before, and she lost the small note that the two of them had passed on.

Well, I think that's a good reason. Nineteen Nian nodded and thought.

The two reasons that have been thought of cannot be used at a critical moment. Nineteen Nian reluctantly handed the exercise book in her hand to the math teacher, she was very nervous in her heart, and her little heart was beating 'plop' and 'plop'.

Huo Wuwu is naturally the same, she thinks to herself that it's over, it's over, it's really going to be over. Sure enough, the palace fighting game was cool for a while, and after being caught, the crematorium was caught.

It was the first time since she grew up that she was called out by the teacher to talk in class.

"I'm so hard, I'm so ashamed." Huo Wuwu lowered her head, the more she thought about it, the more she wanted to cry.

The math teacher patiently looked at the content of the conversation between the two of them, and after a while, she closed the exercise book and said to the two of them solemnly, "You two are not small, and the Son of Heaven dares to break the ground under his feet." ”

Nineteen Nian replied calmly: "Then why don't you dare!" ”

A dead horse is a live horse doctor, she was caught anyway, and when she died, she had nothing to fear.

The math teacher returned the notebook to Nineteen Nian, "The exam is coming soon, you two try to be honest in class, don't make trouble, it's not good for everyone, because of this incident, you delay everyone's study time for at least ten minutes." ”

The two of them nodded, obeying.

Sure enough, after making a mistake, he was the most well-behaved in front of the teacher, and the two of them were very honest at this time, so honest that they didn't even dare to come out.

"Listen to the lecture when you go back to the classroom, and don't write such boring things anymore." The math teacher was helpless to educate the two students.

Why is it that there are one or two students who are not very obedient in every class. She really had a headache when she thought so, and she didn't know when they, the naughty and mischievous students, would be honest for a while.

"Uh-huh." Nineteen Nian nodded vigorously on the surface, but in fact, he was reluctant in his heart.

Speaking of honesty, it's weird that she can be honest with such a boring and incomprehensible math class.

If she is bored, she will not be honest, and being honest means that she is not boring.

Nineteen Nian suddenly lowered his head and stuck out his tongue.

。