"Good, good!"

"It's great that you can still write like this!"

Zhang Cang held a pen and quickly wrote mathematical equations on the paper, and kept praising from his mouth.

After Zhao Tuo's simple explanation, Zhang Cang, who was already proficient in mathematics, quickly understood the meaning of those strange symbols.

After a simple experiment, Zhang Cang, a scholar, was instantly obsessed with it, and now he is frantically calculating the mathematical formulas brought by Zhao Tuo.

Zhao Tuo smiled faintly on the side.

The mathematical level of the Qin Dynasty was actually not bad, and at this time there was already a ninety-nine multiplication table.

Moreover, the "Nine Chapters of Arithmetic" and "Zhou Ji Sutra" finalized in the Han Dynasty, many of the contents have been popular since the Warring States Period.

So in order to befriend Zhang Cang, Zhao Tuo took out his blood capital.

This time, he not only figured out the Arabic numerals, but also wrote down the symbols such as addition, subtraction, multiplication, and division, as well as some simple formulas.

Decimals, fractions, negative numbers, equations, inequalities......

As long as Zhao Tuo can remember, he will write it all.

He is also afraid that he will be old in the future and have a bad memory, and if he forgets some of these things, it will be a big loss.

Zhao Tuo's mathematics level is actually at the middle school level, and he may be so-so in the future, but in this ancient era, it seems to be extremely advanced.

Zhang Cang was frantically checking beside him, and Zhao Tuo didn't bother when he saw him put in it, and took Han Xin to look through the ancient books in the library.

"The history books of the Six Kingdoms, this thing will not be found at all in the future generations."

Zhao Tuo put down the book that recorded the history of Zhao in his hand and sighed leisurely.

The current Qin State has just unified the world, and there has been no book burning incident, and the first emperor directly waved his hand to collect these historical books of other countries into the library for reference at any time. It will not deliberately tamper with or even invent history like some later dynasties.

Looking at the books in front of him that recorded the centuries-old history of the Six Kingdoms, Zhao Tuo thought of a question in his head.

After many years, how will he be written in the history books?

"Maybe it's going to be unrecognizable."

"Either deified or belittled in all sorts."

Zhao Tuo shook his head and looked sideways at Han Xin next to him.

He saw that this Huaiyin boy also took a history book, and was obsessively looking at the part that described the war.

Zhao Tuo persuaded him: "Ashin, don't just look at the battlefield battle, you also have to take a good look at the part about the political struggle in the court." ”

Han Xin raised his head and pouted: "Junhou, I'm only interested in conquest, and those who write about the court are boring." ”

Looking at Han Xin's aggrieved appearance, Zhao Tuo shook his head and said secretly: "This stupid boy, even if he wins a hundred battles and doesn't understand the court, he is easy to die." ”

Just when Zhao Tuo and Han Xin were chatting, Zhang Cang, who had been burying his head in checking the formula, threw the pen on the case and shouted, "Okay! ”

Zhao Tuo looked sideways and said with a smile: "The history of the pillar has been checked, is there a fallacy?" ”

"There is no mistake, using these numbers given by the prince to check, it is really twice the result with half the effort, it is extremely easy! And these decimals, fractions, and so on, I just looked at them, and I already felt that this was really a wonderful method, and I should go back and study it carefully. ”

Saying that, Zhang Cang looked at Zhao Tuo with admiration on his face and said, "Junhou, you are really a genius in mathematics!" ”

"Genius can't be called a genius, it's just a trivial idea."

Zhao Tuo waved his hand modestly.

Seeing that Zhang Cang had the idea of further questioning.

In order to avoid trouble, Zhao Tuo was afraid that the other party would keep asking, and in the end he said that he was too exposed, so he simply adopted a simple and crude method.

"In fact, these number symbols were first read by me on the fragment left by the male loser, and I didn't think much about it in my heart at the time. In the past few days, I read the book and found that there were some troubles in the calculation, so I remembered these, so I changed and deduced the number symbols left by the male loser back then, which made these numbers today. ”

Zhao Tuo said with a smile.

The ancestor loses to the ancestors, and all things originate.

With a great reputation and high credibility, it's really a perfect shield.

Sure enough, hearing Zhao Tuo's explanation, Zhang Cang looked relieved.

Lu Ban, the son of the public loser, is a famous craftsman in the world.

Since he was a craftsman, he must have been quite accomplished in mathematics, and it was reasonable to make these simpler and more convenient numeric symbols to assist his carpentry skills, without any traces of counterfeiting.

"The male loser not only understands the method of attacking the city with instruments, but also knows the art of agriculture, and can also make paper, and now even the number of techniques is unparalleled in the world, this is really a god and a man. I hate not being able to swim with such people! ”

Zhang Cang sighed, looked at Zhao Tuo again, and praised: "The prince can improve and complete the public loss figures, and he is also a capable person. ”

Lost numbers?

The corners of Zhao Tuo's mouth were slightly hooked.

This new style of mathematics has the authoritative endorsement of the public loser, and it will be easier to promote it, and he Zhao Tuo can also easily take the credit for improving the public loss number.

"Maybe in the future math textbooks, I can also add my name Zhao Tuo."

Zhao Tuo, a great mathematician in ancient China, has improved and popularized on the basis of public numbers, and has made great contributions to the development of mathematics, and is the founder of modern mathematics and a figure that can never be avoided in the history of mathematics development.

Thinking of these words, Zhao Tuo couldn't help laughing.

He turned his head to Zhang Cang and said: "This number is new, maybe there are still mistakes, the history of the pillar has always been erudite, please help me check it more, if there is no problem in the end, we can dedicate it to the emperor to promote the world, maybe these numbers will be called Qin numbers in the future, and the credit of the history of the pillar will be indispensable at that time." ”

"It's easy to say, it's easy to say."

Zhang Cang hurriedly responded, not to mention whether there was any merit in this matter and whether he could leave his name, just because this was a research that he was very interested in, it was enough to attract all of Zhang Cang's energy.

He thought for a while, and then worried: "It's just that digital promotion is very troublesome and almost overthrows the previous counting text, will the emperor agree?" ”

Zhao Tuo laughed, walked to the side of the case, picked up the pen and wrote two numbers on the paper.

"You see, I'm Da Qin Shui De Shang Six, if you look at it with the original numbers, it doesn't mean anything. But if you write it as a new number, it's 6, and if you write it backwards, it's 9. ”

"9 is the most numerous. 6 to the extreme, that's 9 also! ”

"You say, doesn't this new number indicate that my Great Qin will last for a long time!"

"The Emperor will definitely adopt it."

Hearing Zhao Tuo's confident words, and then looking at the 6 and 9 on the paper, Zhang Cang reached out and wiped the sweat on his face.

The mouth of this martial arts marquis is incredible!

Thinking like this in his heart, Zhang Cang's face showed a look of eagerness.

He is a person, although he is just a petty official under the pillar, but he has studied art under Xunzi, and he is Li Si's junior brother, he has seen many scenes, and his heart cultivation is very strong.

If Zhao Tuo used the position of prince to befriend him, Zhang Cang might be surprised or flattered, but he would definitely be vigilant in his heart. guess that Zhao Tuo, the high-ranking Lunhou, deliberately befriended him, whether he had some unknown purpose, he would never really have intersected with Zhao Tuo.

But Zhao Tuo's new mathematics dispelled Zhang Cang's vigilance.

The reason why the martial arts marquis came to him was because he heard that he Zhang Cang was good at calculation and proficient in mathematics, and he specially came to engage in academic exchanges with him, the purpose was very pure, and there was no other bad intentions at all, so there was no need to doubt it too much.

After all, it is impossible for Wugong Hou to come up with a new set of numbers as a stepping stone in order to make friends with him Zhang Cang, right?

In such a situation of relaxing his vigilance, Zhang Cang discovered the advantages of martial arts marquis who does not respect and humility, has a gentle and friendly personality, and is erudite and talented, and immediately has a good impression.

After some conversation, the two quickly became good friends, and even Zhang Cang took the initiative to invite Zhao Tuo to his house as a guest.

When it was getting late, when Zhao Tuo came out of the imperial history library, he couldn't help but sigh in his heart: "This is what it is good for!" ”

Now that Zhang Cang has caught up with the line, when he is familiar with his relationship in the future and becomes his own person, he can find an opportunity to recommend him. With these people in charge of the DPRK and China, this Great Qin will surely prosper. ”

A smile appeared in the corner of Zhao Tuo's eyes, feeling that everything in this country was developing in a good direction.

Perhaps in order to be more happy, within a few days, there was news that made Zhao Tuo happy.

Ren Huan, the general who won the great victory of the Southwest Yi, was about to escort the captives from the Southwest Zhuyi and triumphantly march to Xianyang.

Ren Huan is back, and Chen Ping, the strategist who followed him to attack Southwest Yi, will naturally come back.

(End of chapter)