Chapter 16 Mathematical Thinking
On the afternoon of the 7th, Yang Fan took a nap for an hour to let his brain message for a while. The alarm clock is set at 1 o'clock, wake up, and after 10 minutes, run to school.
There were three classmates in the classroom, Lin Yuwei saw Yang Fan appear from a distance, a trace of surprise flashed on her face, and she pretended to be calm and did not speak.
Yang Fan pretended to say hello to the other two, returned to his seat, and said, "Take out the roll." ”
Lin Yuwei obediently handed it over, Yang Fan saw that there were already a lot of messy handwriting in the last two questions, presumably she had tried many times, and finally had no choice but to ask for help.
"Lin Yuwei, you talk about it first, your own ideas, I see you have also written, maybe not to the point. ”
Lin Yuwei approached, wrote and drew on the scroll, and whispered some thoughts.
This intimate act fell in the eyes of the remaining man and woman. They looked at each other and grimaced at each other.
"Hey, I tell you two, don't guess. "Don't look back, Yang Fan is making a joke, "If there is really an insider, will it be in the classroom?"
The two passers-by were stunned for a moment, yes, they couldn't go anywhere, but they had to choose a classroom, it seemed that they wanted to be poor.
Lin Yuwei's heart is warm, he is really a careful boy.
"Lin Yuwei, this question, the difficulty is there, but it's not impossible to do it at all, let me tell you, you have to put yourself in the perspective of the person who wrote the question, are they deliberately trying to make it difficult for you and make you clueless?
Obviously not, they're going to dig traps and get your train of thought offset. Some topics are simple, just because they lack variables, and some are difficult, just dig a pit and wait for you to enter. ”
When these words fell on the ears of the three people, their eyes suddenly brightened, and they instantly had a sense of foresight and clearing the clouds.
"Yang Fan, I won't either, add me a share. ”
"Yang Fan, you said it well, can I listen to it too?"
"Yes, you guys come over too, I have some experience in math recently, and it's okay for everyone to communicate with each other. ”
The four of them sat in a pile around a table, with Yang Fan as the center. Yang Fan is not just for that topic, it is better to teach people to fish than to teach them to fish.
After talking like this for nearly an hour, Yang Fan spoke cheerfully, and the listeners were even more happy.
"I say to you, here'...... Alas. Yang Fantou collided with Lin Yuwei, touched his forehead, and looked at it, how could seven or eight people be surrounded, I said that I felt that I couldn't squeeze my head too much.
"Hey, Yang Fan, why don't you talk about it, say it quickly. ”
"I just heard some smells, hurry. ”
"Yes, yes. ”
"No, everyone is huddled together, and there is no place to put their heads. "Seven or eight heads are in a pile, and they hit each other with a slight movement.
"No, you have to say, what does it matter if everyone is crowded. ”
"You can't just tell Lin Yuwei, I want to gossip about what you do like this. ”
Lin Yuwei's face turned red, how could it be on herself.
The classmates were eager to study, and Yang Fan had a flame in his heart, and said: "Okay, you sit in your own seat, I will write on the blackboard, today, I will talk to you well." ”
Yang Fan confidently walked to the podium, wrote down the questions, waited for them to sit down one by one, nodded and said, "As I said just now, math topics will never deviate from the outline." Difficult problems and simple problems have reached a certain level, and they are much the same.
When you enter Wuzhou Middle School, you are all the top students in junior high school. No one has a low IQ. We must first have a pair of eyes that can see through the fog, and this question gives four conditions. Let's first briefly calculate what results can be obtained after each condition is given......"
Yang Fan talked eloquently, flamboyant and calm. A mathematical problem, under his hands, from difficult to easy, in three or five sentences, the answer is analyzed.
This condition is actually misleading by the person who asked the question. He doesn't tell you directly what you can come up with, let you guess. After corresponding the answers, we will know his sinister intentions, and let your thoughts go to the abyss......"
It was already two or three o'clock in the afternoon, which happened to be the peak of day students. When the classmates entered the class, they found Yang Fan explaining on the podium and consciously entered through the back door.
Listening and listening, I was instantly attracted by his train of thought and joined the team that listened carefully.
Science, the rarest is generally the last question. Some of the students who arrived at the school made it, but it took a lot of time.
And now, listening to Yang Fan's explanation, I found that I was really different from him. The kind of bloody and tearing statement that is more incisive and shocking is more incisive.
"Okay, now we know the answer. Just ask, what do you do when you want to test your classmates with questions, and you are also the person who produces the papers. These four conditions are all necessary.
If you're going to make it the hardest, it's the current format, and to make it a little easier, it's some of the steps in the process of solving the problem. Now, who has any doubts about it?"
More than 20 students, at the same time, closed their eyes and pondered, and suddenly found that this last question seems to be simpler than the previous questions, why?
It's obvious. I understand it.
Lin Yuwei was the first to applaud, she was excited that her mathematical understanding had increased greatly, and she was excited to find the right person.
Other students applauded, and some people shouted even more: "Yang Fan, Niu B." ”
"Don't be funny, the next class hears it. Yang Fan waved his hand.
Suddenly, someone in the hallway applauded.
Next door is the fourth class of the same grade, and someone has already found out about the third class. Yang Fan didn't pay attention on the podium, and the audience didn't pay attention to it, but we must not underestimate the enthusiasm of a group of students for knowledge.
"Yang Fan, it's still early, we're working on this paper in both classes, and now it's just the right answer. The squad leader Zeng Sisi arrived, and as soon as she spoke, who dared to object.
"Corridor everyone, we haven't all arrived, come in together and listen, take a notebook and stand, people will say that our class is stingy. ”
Zeng Sisi instructed the last few men to get out of the way and invited them to sit in the back row.
A few people from the next class entered with a twist, and some people returned to their class as soon as possible, picked up the paper and ran over.
Yang Fan is a little difficult to ride a tiger, how can he do this. I didn't mean it.
"Yang Fan, hurry. ”
"For the first question, I choose B, what about you. ”
"Don't talk to anyone, listen to Teacher Yang. Zeng Sisi shouted, and he laughed too.
"Okay. Then let's start with the first question. It's C. ”
The class is quite active, at this time there is no need to pay attention to discipline, once you find out that you are wrong, you will scream, if it is right, complacent, and at the same time ridicule the low-level mistakes of other students.
For each question, Yang Fan will ask the wrong student to raise his hand, skip it when the number of people is small, and analyze it one by one when there are many people.
"There's a trap here, so half of the students are wrong, and it's a very low-level mistake. Two points were lost. Let's take a look at ......"
"There is a difference of thought here, left and right seem to be right, but in fact they are all wrong, be careful......"
After another hour of talking, I looked up and saw that the seats in the class were full, and the next class took up a small half.
The teachers of both classes repeated, and they were usually opponents and comrades-in-arms.
In my own class, there are a lot of people. Song Minghui was uncertain and did not speak.
Ye Haoran nodded in agreement from time to time, obviously keeping up with Yang Fan's train of thought.
Qi Yueshu always hovered between bowing her head and raising her head, and she was shy after her eyes collided.
Xiao Hongye also arrived, dragging her chin with her hands, staring at the podium motionless, and it didn't take long for saliva to drip onto the textbook. Let the group look at the lone dog in the next class of the goddess, and the faith collapses.
At this moment, Yuan Wenbo arrived in a hurry, and before he could figure out the situation, he shouted: "It's all here, brothers, the special students of the second year of high school have grabbed our court, come and help." We were beaten by them. ”
This cry was very loud, and Yuan Wenbo said it very desolate in order to express sympathy.
Zeng Sisi glanced at him with disgust, there are too many muscular men, I really can't carry it, I won't do a few more questions when I have this time.
Just as he was about to drive him away, a group of male classmates were unwilling.
"What, it's so arrogant. ”
"Sophomore, don't you know how to respect your seniors?"
"Kill them, everybody go. ”
Teaching one person is not the same as a class, Yang Fan also felt that he was too hard, run away early, and go to the court to relax.
"Okay, it's over. Yuan Wenbo, let's go. ”
"Hey, Mr. Xiao Yang, let's talk about it again. ”
"You male classmates, you are all stupid, and you have a lot of hormones all day long. ”
"Yang Fan, you ......"
Seeing that someone called him, Yang Fan didn't dare to linger, nodded to Lin Yuwei, and shouted: "I am an athletic teenager, and I was born to be a genius in basketball, go quickly." ”
A group of male students immediately followed, and the female students were silent, so let's go and have a look.