This method of mental arithmetic can be said to be the pride of the Chinese mathematics community in the previous life!

Because this calculation method evolved from the abacus, it is absolutely original by the Chinese people. Pen, fun, pavilion www. biquge。 info

In the previous life, the National Olympiad team used mental arithmetic to train mental arithmetic.

When the abacus method is mature, those quick arithmetic masters can pick up the paper and scan it at a glance and start to write the answer directly.

Wang Xiaofan picked up the chalk again, and while writing and drawing, he explained: "The so-called abacus mental arithmetic is abacus mental arithmetic. Abacus is a calculation method that uses the abacus as a tool to add, subtract, multiply, divide, and open squares. When the user can skillfully operate the abacus, in addition to quickly finding the correct answer, it can also depict the disc type, grade and floating changes of the abacus into the brain through the growth of brain cells, that is, as if there is a live abacus in the brain, and the image of this live abacus is called a virtual disk. It uses perception, image, memory and other processes to complete abacus operations in the brain, which is what we call abacus mental arithmetic. ”

On the whole blackboard, all the drawings are about the specific training process and methods of mental arithmetic.

When Li Yang saw these methods, his shocked mouth opened and he didn't close it for a long time.

As a mathematician, I can naturally quickly understand the specific application of the so-called mental arithmetic.

"The speed of the master of mental arithmetic is astonishing. Often, as long as you hear the number of questions or see the type of calculation question yourself, the calculator can blurt out the answer or write it out immediately. Dean Li, if you don't believe me, you can give it a try. Wang Xiaofan said with a confident smile.

According to Wang Xiaofan's method, Li Yang glanced at the question he had just done again......

A miracle happened!

The imaginary abacus in my mind, after the floating changes, the answer is immediately clear and clear!

Subtle!

No!

This method can be called "absolute"!

Li Yang looked at the blackboard with mental arithmetic written on it with obsessive eyes, and his hands trembled slightly, as if he was babbling treasures: "Good way!" What a way to do it! ”

The old professors of the Shuyuan who were sitting and watching below were also like the collective high (harmonious) tide, and everyone blushed and screamed.

"Write it down! This is a new high-efficiency quick calculation method discovered in the mathematical community! ”

"I just used it, and the effect is unbelievable!"

"The quick calculation method that the abacus has evolved? It's definitely my original Huaxia! ”

"Publishing this method will definitely make the Chinese mathematical community raise their eyebrows!"

Luo Hao was dumbfounded.

Wang Xiaofan actually invented a quick calculation method that made the old professors of the Academy of Mathematics present marvel at their practice!

You have such a good method, why didn't you publish it earlier?

Isn't this Nima a pit man!

Bai Lan's whole person was stunned.

Fighting the piano, defeating Ye Mo is barely understandable, after all, Wang Xiaofan is playing music.

Doucai, defeating Hu Sen, has already begun to surpass Bai Lan's cognition.

Now, even in mathematics, Wang Xiaofan has invented a quick calculation method that can shock the world's mathematical community!

Bai Lan couldn't help but wonder what kind of monster she had invited!

on the podium.

Wang Xiaofan walked to Li Yang, who was looking at the mental arithmetic method on the blackboard with an obsessive face, and refused to look away for a long time, he couldn't help but pouted his lips funny, and then patted Li Yang's shoulder vigorously and said, "Dean Li, hey, Dean Li, wake up, wake up!" ”

"Huh? What, what's wrong? Dean Li seemed to have just awakened, and looked at Wang Xiaofan a little dazed.

He just looked at the blackboard and was fascinated!

"Do you think I can pass this assessment?" Wang Xiaofan asked.

Li Yang was stunned for a moment, thinking about his gaffe just now, and couldn't help blushing slightly.

"Ahem...... To tell you the truth, this quick calculation method you invented is really powerful. If you take this assessment, even if you ......"

"Wait a minute!"

Before Li Yang finished speaking, Luo Hao was anxious.

Throw in the towel so easily?

That's still a hairy one!

"Oh? Dean Luo, do you have anything to say? Wang Xiaofan asked lightly.

Afraid of you??

Use any trick!

"It's just a quick calculation method, even if you calculate quickly, you don't necessarily have a higher level than Dean Li, right?"

Shameless!

It's shameless!

Abacus mental arithmetic is a training method used by the previous World National Olympiad team, and now it's okay, in his Luo Hao's mouth, it has directly become a "quick calculation method"!

Wang Xiaofan held back his anger and asked, "That's good, if Mr. Luo thinks my method is simple, you can come to a more powerful method than mine!" ”

"I'm not a math student, how could I? Teacher Li Yang, didn't you prepare a few questions before and want to use them in this assessment? Hurry up and take it out! Luo Hao said.

Li Yang looked at the notebook with the title written on the podium with a strange expression, and glanced at Wang Xiaofan again, looking like he wanted to speak and stopped.

"Dean Li, will I be able to pass the assessment after completing your assessment questions?" Wang Xiaofan asked.

"To pass is to pass...... But...... Hey, Dean Luo, why don't you forget it this time...... How can he ...... these questions?"

"What's it? Didn't you say before, those questions will be used in this assessment? Who swore before that he would definitely pass the test? Luo Hao said angrily.

Li Yang's face turned red.

I was so bullish before, but I didn't expect it to be a handle now!

But if it were those topics, Wang Xiaofan would not have been able to do it at all!

The dean of his own dignified mathematics college, using such despicable means to embarrass a student who has only been a sophomore and is still nominally his own apprentice.

Isn't it too lewd?

Li Yang was very entangled, his tangled mouth was white and dry.

When Wang Xiaofan saw this, he said, "Dean Li, if you have any questions, just take them out and let me do a good job." I've done it all. Even if you don't know how to do it, I'm confident that I can do it! ”

Ouch I'll go!

That's arrogant!

When Li Yang heard this, his enthusiasm rose, and he didn't care about thirty-seven twenty-one, so he picked up the notebook on the podium and threw it to Wang Xiaofan: "There are seven questions on it, I can honestly tell you that I won't do any of them." Today, as long as you can do it right, let alone the assessment, I can let you do it as the dean of the School of Mathematics! ”

After saying that, Li Yang regretted it.

It's not that he regrets what he said, it's that he shouldn't have taken out the notebook at all.

To do so, it's despicable!

Wang Xiaofan felt that although Li Yang was choked by his anger, his words flickered, and he didn't dare to look directly into his eyes, why is this?