Teacher Wang sighed: "Liu Quan, in order to confirm the right and wrong answers." So, you tell the answer to your calculations. ”

Liu Quan wiped his sweat, picked up the pen and busily carried out calculations on the white paper, all kinds of vertical and various formulas to put inside.

About two minutes later, Liu Quan said weakly, "X=10." But I calculated the answer by myself, and Li Zhen's answer must be problematic. He was sure to know the answer in advance, how could he calculate such a difficult question in an instant. ”

Li Zhen sighed, and finally explained helplessly: "It's not that the question is difficult, it's that people are stupid." ”

"You...... You scold me. ”

"Elementary school level questions, instant mental arithmetic, is it really surprising?"

Li Zhen shook his head and said with emotion: "Mathematics shouldn't be so complicated, the core is to find complex answers in a simple way." And you, on the other hand, make it too difficult. Just a score makes you embarrassed to write vertically on the paper, constantly counting the result with your fingers. In fact, if you solve the problem in a different way, you can also answer it in seconds. ”

Teacher Wang looked at Li Zhen curiously: "How did you solve it?" ”

Li Zhen said expressionlessly: "8.5+65%X=15." Why do you need to go through the complicated calculation of scores? You can convert 65% to 0.65. So this question is: 8.5+0.65X=15. Subtract 8.5 from known answer 15 = 6.5. Knowing that the number before X is 0.65, then ...... How much does 0.65 times equal to 6.5? The answer is 10."

“……”

The audience was silent. Everyone looked at each other. Even the math teachers were stunned.

Is it that simple?

Liu Quan was a little distracted: "Ah, yes, 65%, can be converted to 0.65 ah ......"

The students all took a deep breath, this is considered to have been learned, can it still be such a simple way to calculate?

"What is his brain made of?"

"It feels so easy to solve this problem."

"Amazing, right? It's certainly not cheating. ”

"Not really."

“……”

Li Xin didn't have any waves in his heart, he took care of the hundred coins in his pocket, and said to Liu Quan with a smile: "In order to fulfill your wishes, I decided to attach a formula to you." ”

Liu Quan's eyes widened and asked, "What formula?" ”

"It's a formula that you're all curious about just now, how did I solve the math problem on the test paper?"

"Say it quickly."

“……”

Everyone pricked up their ears, very curious about Li Zhen's question just now.

Li Zhen smiled lightly: "That question is a question of fraction multiplication and division. It stands to reason that the calculations are very complex and very difficult. But there's a way to make the addition, subtraction, multiplication, and division of all fractions simple and easy to understand. ”

"It's called the fractional split."

When the words fell, Liu Quan grabbed the test paper in a panic, carefully looked at the calculation formula left on the test paper when Li Zhen solved the problem on the test paper, and said in a trembling voice: "What is the fraction split term method?" ”

Teacher Wang and other math teachers also surrounded him, and looked at Li Zhen excitedly: "Tell me, what is the split term method?" ”

"I've never heard of this way, what is the splitting method?"

"Is the splitting method your reliance? You write the test paper so fast, and the answer accuracy rate is 100%, do you rely on this splitting method? ”

"Come on, don't sell it."

“……”

The school leaders also surrounded him, looking at Li Zhen intently, this guy is full of witty words, and a random noun in his mouth makes people tremble.

Li Zhen said lightly:

"There's an interesting phenomenon in the scores. If the numerator of the fraction is the natural number 1, and the denominator is the product of two adjacent natural numbers, then this fraction can be written as the difference between the two fractions. The numerator of the two fractions is still the natural number 1, and the denominator is the two adjacent natural numbers.

In fractions, you can use this as a way to simplify calculations that seem to be very complex and difficult to understand. It is clear at a glance, and the answer is instantaneously calculated.

This is called the split term method! ”

“……”

After listening to Li Zhen, most of the classmates were in a fog, couldn't understand, and didn't know what he was talking about.

And some students who studied well started to calculate on the paper with doubts on their faces. Liu Quan also picked up a pen and paper, gave himself a question, and then used the split method mentioned by Li Zhen to start the operation.

Not only the students who studied well, but also the school leaders and math teachers began to silently perform calculations.

'Rustle'

No one in the room spoke, only the sound of pen and paper rubbing.

Five minutes later, Liu Quan put down the pen, stood up and bowed to Li Zhen:

"I was wrong."

'Wow'

The classmates who didn't know the truth looked around blankly, Liu Quan, whose family conditions were extremely wealthy, and Liu Quan, who had no one in his eyes, actually bowed and apologized to Li Zhen in public?

What's going on?

After a while, Mr. Wang sat down on the chair weakly, constantly wiping the cold sweat on his forehead: "Demon! ”

"You're a wicked!"

"Math, how can you still play like this?"

"Split term method...... Is this the splitting method? ”

"It's amazing!"

'Hum', the scene exploded instantly.

The students who studied well also tested this new term - the split term method.

Everyone felt creepy, everyone felt cold and cool. Looking at Li Zhen's eyes, it was like looking at a demon.

"How could he do that? Is this the way he invented it? ”

"The addition, subtraction, multiplication and division of fractions is very difficult to calculate. The various conversions of the denominator and the numerator alone make people's heads numb. How could he invent such a way to do the math? ”

"The splitting method is exactly what it sounds like. A method of splitting each item and calculating it sequentially. Split term method. ”

"This is simply a mathematical genius, and no one in the history of the Kyushu Empire has ever proposed such a calculation."

"He used to pretend to be a pig and eat a tiger, and he never showed that the mountains were not leaky, and his knowledge was so powerful."

"This Li Zhen is not only knowledgeable, but the horror is that he can invent new algorithms?"

“……”

Everyone felt frightened, looked at the ragged and thin man, and felt that he was extremely tall at this time.

Split term method!

Teacher Wang trembled his beard and said, "This ...... How do you know this great way of calculating? And with whom? Did you create it yourself? ”

Li Zhen smiled and did not speak, did not answer, did not speak.

There was a silent sigh in my heart. This is elementary school math from 10,000 years ago, and the math in my subject is actually not very good, compared to the ......

Now in the new calendar of 10,000 years, how much is the fault line in basic disciplines?

He felt a little sad for the world.

But at the same time, I feel that the burden on my shoulders is getting heavier and heavier. Perhaps it is obligatory to spread the knowledge that he has frantically absorbed there, the basic disciplines of 10,000 years ago, to the barren world today......

The chemistry teacher also took the opportunity to ask:

"I would like to ask Mr. Li, there is a question on the test paper about how to get oxygen. In the field we know, there are only two ways to get oxygen. The first is electrolyzed water, and the second is potassium permanganate heating...... And you, what does this formula mean by staying? Looking at a fragmented periodic table left over from ancient times, if I'm not mistaken, this formula should be the formula for extracting sodium acetate, right? What does it have to do with oxygen? ”

Li Zhen asked rhetorically: "If I remember correctly, does this question ask like this: how to extract oxygen faster and more conveniently?" ”

"Yes. That's what I asked. This question is mainly inclined to rapid oxygen production, and it is a bit of a brain teaser in nature. Because among the two known methods of electrolysis of water and potassium permanganate, heating potassium permanganate can obviously get oxygen faster. Heated potassium permanganate is filtered by water to ......"

The chemistry teacher gushed endlessly, and Li Zhen interrupted:

"In addition to that, there is a third way to produce oxygen faster. Conform to the question type, the main thing is to be fast and convenient, so ...... 2Na2O2+2CO2=2Na2CO3+O2。 ”

The chemistry teacher asked, "What does this mean?" ”

"Sodium peroxide reacts with carbon dioxide to produce not only sodium carbonate, but also oxygen. Because carbon dioxide is a common greenhouse gas, only sodium peroxide is needed. In other words, as soon as sodium peroxide is a room temperature gas, it can produce oxygen without any operation. Faster and more convenient. Because they react to produce oxygen, you can carry it with you at all times...... Conform to the type of question. Can I put on the device at any time when I produce oxygen by electrolyzing water? Can I take a beaker, water, and potassium permanganate test tube with me at any time for the potassium permanganate reaction? ”

"I can't."

"So, it's easier and faster to produce oxygen. So it is equal to: 2Na2O2 + 2CO2 = 2Na2CO3 + O2. ”

“……”

Li Zhen's voice was heard echoing in the auditorium, all the teachers were petrified, and all the students looked at him with god-like eyes.

Holding his breath, no one dared to make a sound for a long time.

Moments later, a chemistry teacher took sodium peroxide, exposed it to air, and observed.

Someone exclaimed, "Really oxygen!" ”

"Oh my God, really."

"Previously, it was only known that sodium peroxide meets carbon dioxide to form sodium carbonate. And many people extract sodium carbonate in this way, why no one has found out that this formula can also produce oxygen? ”

"How did he find out this way?"

"Ah, there are three ways to prepare oxygen!"

"No one has found out for so many years, and he did. In chemistry textbooks, there are only: 2Na2O2+2CO2=2Na2CO3. And Li Zhen actually discovered that when the two are added, the answer is equal to +O2. ”

"So careful."

“……”

Immediately afterwards, the physics teacher couldn't wait to raise his doubts.

Li Zhen once again took the trouble to give the answer, and it was verified that it was so.

In the whole auditorium, from the school leaders, to the teachers, to the students. The audience was amazed.

They only guessed that Li Zhen might be a scholar before, but today they found out that Li Zhen had already unknowingly subverted everyone's cognition.

This knowledge ...... Where did he learn it?

In the 10,000 years of the new calendar, he knew all the concepts that no one had ever put forward in the history of the world.

Coincidentally, all the teachers and students were cold-hearted, looked at Li Zhen, and only thought of one word to describe - wisdom and demons.