Chapter 462 Cannon fodder stepsister doesn’t want to die (19)
The new deskmate looked at question nine like an ant on a hot pot.
"Ah, that's it. I can't do the ninth question..."
I was so busy celebrating the art festival that I completely forgot about correcting the papers in advance. I saw all the classmates in front of me stood up, and my deskmate grabbed Jiang Lai's sleeve eagerly.
"You, can you know question nine?"
Jiang Lai glanced at it, then took out a pen and drew an auxiliary line on her paper, followed by a formula.
As soon as I saw the auxiliary lines and formulas, my problem-solving ideas suddenly became clear.
The new classmate kept praying that no classmates would get stuck in front of her. Fortunately, she was lucky and everyone got on smoothly.
When she arrived, she stood up and went on stage to draw the graphics and auxiliary lines, then listed the formulas to calculate the evolution, and calculated the answer.
The head teacher looked at her with stern eyes.
"You are thinking very clearly now, why can't you act in the examination room!"
The new tablemate walked down as if he had received an amnesty, the sweat on his back was slightly cold. He looked at Jiang Lai with eyes as if he was watching his ancestors appear, full of piety and gratitude.
Originally, the first column was over and it was time to move to the first column of the second column, but the head teacher pointed directly at Jiang Lai.
"You continue, this time from back to front."
As soon as these words came out, all the students in this column immediately became nervous again.
The new deskmate looked at Jiang Lai nervously.
"This question is the final multiple-choice question. You can just say no, and the teacher will save it for last."
The monthly exam papers are inherently difficult, and the last question of selecting and filling in the blanks is basically used to widen the gap.
Moreover, the calculation amount of this question is almost the same as that of the last big question. There are seven or eight formulas involved in drawing and deriving. Most people just skip this kind of question and get it later. Even if you go back and revise the paper, you may not be able to understand it even after listening to the explanations from the top students.
Now Jiang Lai was about to go on stage to explain to the whole class, and everyone turned around to look.
It doesn't matter if you don't know this kind of question. Even if there is a standard answer, it may not be clear. What's more, Jiang Lai was transferred from the art class, so no one has any expectations for her.
The teacher looked at her, looked at the questions again, and was about to ask her to skip the next fill-in-the-blank question, when Jiang Lai stood up, picked up the paper, and slowly walked onto the stage.
The whole class: "..."
Picking up the chalk, Jiang Lai started from the middle of the blackboard, drew a picture first, and then calculated according to the steps.
In the audience, the two girls with the best grades in the class whispered from the front seat.
"Not many people in the whole grade can solve this problem. Even if they do it, some people don't know how they calculated it. Many steps don't make sense at all."
The other one said impatiently and dissatisfied.
"Why is the teacher wasting time in class? He could just ask this question himself, why should he waste everyone's time listening to others read the reference answers?"
The key reference answers are very concise and difficult to understand even after reading them.
"Maybe she asked someone in the key class for ideas. Just listen. Anyway, the teacher will say it again in the end."
"There are only a few people in key classes who do this question. I've asked them all, and they all use the same method. To explain it clearly, it would take at least a whole class. She probably also used the method Qiao Chuwen said. , it will probably waste a lot of time.”
The class teacher crossed his arms and stood with his legs spread apart. The whole class was a little curious about this new classmate, especially the boys. The moment Jiang Lai walked into the class, many of them had their eyes wide open. .
In this science class where there is an extreme lack of resources for girls, if a campus figure like this, who is fair-skinned and beautiful and has just shined on the stage not long ago, suddenly enters the class, which boy can't help but take a peek?
Now he is on the podium, with his back to everyone, his neck is slender under his ponytail, his arms are fair and slender, his arms are raised high, his slender hands are holding chalk, and he is listing formulas on the blackboard in an orderly manner, and occasionally his voice is very clear when explaining. Beautiful.
There was silence in the audience.
There was only the sound of writing on the blackboard.
She thought she was going to list the entire blackboard, but after only occupying one-fifth of the space from beginning to end, the answer to the question came out.
It's simple, clear, and clear. Every formula used from beginning to end is highlighted, and the handwriting is pleasing to the eye, neat and clean.
Every formula is found in textbooks, but every transformation method is something that many people would never think of.
"Damn it, can this happen?!"
Such an exclamation suddenly came from the audience, but no one thought it was sudden, because this was everyone's voice.
From start to finish, it took less than eight minutes.
This also includes a more detailed explanation of the deformation process. If Jiang Lai did it by himself, it probably wouldn't take more than three minutes.
The head teacher looked at her thoughts, then nodded and took the lead in applauding her.
"Yes, very good! It's better than my method. Please read carefully and learn how to quickly find ideas and entry points for this type of questions!"
Jiang Lai smiled calmly and generously.
"I've done something like this before."
"You have done similar questions like this, so you have done a lot of questions."
"When learning mathematics, if you don't have talent, you can only rely on problem-solving tactics. Thank you teacher for the compliment."
After saying that, she returned to her desk, and her classmates looked at her with admiration and admiration in their eyes.
The new tablemate was so excited that he couldn’t sit still.
God bless you, why did you assign such a powerful math master to her as your deskmate?
Solitaire continues, but many people’s minds are no longer on the topic.
Before get out of class ended, the head teacher knocked on the blackboard.
"Some boys, please control your hormones and think carefully about whether other girls can like you when you are showing off your charm!
Jiang Lai, come to my office after class. ”
As soon as Jiang Lai left, the whole class of boys started discussing like a den.
"I swear I fell in love with her when she was dancing!"
"Then I would have been earlier! I noticed her when I saw her running for 1,500 yuan!"
"You drank too much, what are you thinking about? Don't you know why people come to our class to stay in the art class? Don't delay their studies."
A few girls in the class were also discussing.
Although it is a science class, the two people with the best grades are still girls. They are still discussing the tenth question just now,
"I don't think Qiao Chuwen's method is as good as Qiao Chuwen's method. It's not about showing off your skills. Is it interesting to use competition formulas?"
Another girl whispered.
"Qiao Chuwen's method also contains many competition formulas, but I didn't realize that Jiang Lai was so good at mathematics."
"Isn't she amazing? She only took over 120 exams. Why haven't I seen her get full marks?"
One of the girls stopped talking.
Feeling the other party's inexplicable hostility, she sighed helplessly. (End of chapter)