Xu Jingzong actually didn't say it, Chen Ying also knew that Xu Jingzong didn't take Chen Ying's official position as the head of the martial arts mansion in his eyes, he just didn't force him to make a living, and his reputation was ruined by Feng Lun to the point that there was no one left, and I am afraid that there is no possibility of recovery in three or five years. Only then did he prepare to borrow Chen Ying's Chen Mansion to study and accumulate fame.

If other methods are used, Chen Ying really doesn't know how to convince Xu Jingzong, but using arithmetic, counting him as unlucky, Chen Ying can completely abuse Xu Jingzong, not to mention Xu Jingzong, even if everyone is counted in this era, I am afraid that he is not Chen Ying's opponent.

But Xu Jingzong didn't know, he knew that Chen Ying was extremely brave, good at commanding the army, and good at poetry and calligraphy, so it could be said that he was both civil and military. However, he didn't know that Chen Ying was actually best at arithmetic.

Xu Jingzong immediately clapped his hand and said: "If Hou Ye wins, Jingzong will be a cow and a horse for Hou Ye for five years!" ”

Chen Ying smiled and said: "If Mr. wins, I will protect you from the five grades of official residence!" ”

Xu Jingzong's heart moved, and he said excitedly: "Really! ”

Chen Ying nodded and said, "Seriously! ”

Xu Jingzong raised his right palm and said, "A gentleman's word!" ”

"Smack!" Chen Ying and Xu Jingzong high-fived and swore: "Hurry up and whip!" ”

Chen Ying wrote "12345678" on a piece of paper, and suddenly found that Xu Jingzong did not recognize this Arabic numerals, so he rewrote it to 12,345,678. ”

Of course, the addition and subtraction of the remaining eight-digit numbers will be more pitiful, even with a sixteen-digit calculator. No one thought that Xu Jingzong would not show weakness and directly write "nine thousand five hundred and forty one thousand seven thousand eight hundred and twenty-six"

Chen Ying smiled, took the pen and recorded the number he had just written on the paper, then put down the pen, and when he looked up, Xu Jingzong had already set up the straw stick quickly, and had already written the first line of numbers on the white paper. Apparently the addition has already been calculated.

Xu Jingzong's calculation speed was beyond Chen Ying's expectations. Fortunately, mathematics is Chen Ying's strength, and although Xu Jingzong is fast, he is not slow. Chen Ying wrote down -83072148 casually, and then wrote down the 107763504 without pause. Chen Ying looked up and found that Xu Jingzong's addition and subtraction calculation speed was almost the same as his, but it was only a few breaths slower.

However, Chen Ying also knows that the ancient Chinese method of calculating addition and subtraction is very convenient, but the method of multiplication and division is relatively complicated (Lao Cheng does not).

Sure enough, as Chen Ying expected, when Chen Ying wrote down the 1177995525256, Xu Jingzong's head was already slightly sweating, and when Chen Ying wrote out the division results, Xu Jingzong directly threw away the calculation chips.

"Xu admits defeat!"

Chen Yingdao: "This is a big food number, which is very convenient to calculate!" So Chen Ying wrote down the Arabic 1 to 9 and 1 to 9 respectively, and then used addition, subtraction, multiplication and division to perform vertical calculations.

At this time, Chen Ying was like teaching a primary school student, patiently teaching Xu Jingzong, and Lan'er also listened carefully. In fact, Lan'er's mathematical foundation is even worse, the addition and subtraction within 1,000 can barely be calculated, and the addition and subtraction beyond 10,000 is blind. However, Lan'er is also relatively smart and has a strong learning ability, which is much stronger than the acceptance ability of junior high school students in later generations.

Lan'er suddenly pointed to the "-" written by Chen Ying and asked, "What is the explanation of this?" ”

Xu Jingzong said: "This should be the meaning of the inadequacy in the nine chapters of arithmetic!" ”

Chen Ying nodded and said: "What Mr. Xu said is good, this"-" is the symbol used by the big cannibal to express 'minus' or 'deficiency', which is also the 'insufficient' that Mr. Xu said!" ”

"Then this cross—oh, a symbol that resembles the Chinese character cross—must be the symbol that represents the meaning of 'ying' or 'increasing' in Middle-earth arithmetic?" Xu Jingzong said happily.

"Exactly ——!" Chen Ying nodded: "This symbol is called 'plus', which means the symbol representing 'profit' or 'increase'; Therefore, whenever a single number of eclipse is preceded by such a '-', it represents the meaning of 'how much is lost' or 'how much is insufficient' in the Middle Earth script, and this kind of numbers with a negative sign in front of them are collectively called 'negative numbers', and those numbers that are not preceded by such symbols are called 'positive numbers'......"

Chen Ying looked at Xu Jingzong, the future prime minister of the Tang Dynasty, like a primary school student, respectful to himself, and Chen Ying felt how happy he was.

Chen Ying secretly thought in his heart: "If you don't go to Lingzhou to be the head of the soldiers and horses, it is better to open an arithmetic academy in Chang'an, specializing in teaching arithmetic.

However, what stunned Chen Ying was that Xu Jingzong suddenly knelt respectfully towards Chen Ying, and when Chen Ying was caught off guard, Xu Jingzong had already kowtowed three times in a row, not only Chen Ying felt inexplicably wonderful, but even Lan'er felt incredible.

The etiquette system of the Tang Dynasty is quite relaxed, not to mention seeing Chen Ying, a superior, even if you see the emperor, you don't have to kowtow.

Chen Ying stood stunned for a long time, and suddenly woke up like a dream, and hurriedly helped Xu Jingzong up and said, "Mr. Xu, you are ......?"

Xu Jingzong said: "Jingzong is willing to be driven by the Hou Ye!" ”

……

The ancient Chinese political system was actually very advanced even in the world. Both Western capitalist democracy and Chinese socialism are actually relative democracies.

However, this relatively democratic political system was already formed in China as early as the Qin and Han dynasties. The evil feudal society is actually a relative democracy.

When the country was faced with an important matter and the king encountered a difficult matter, the emperor would convene a meeting of the three princes and nine ministers and relevant officials to discuss a solution, and the final decision would remain with the emperor.

The scope of the court meeting is very wide, involving politics, economy, military, culture, etc., and the number of participants in the court meeting is determined by the negotiation office. There is a difference between court meeting and assembly meeting. The emperor listens to the government in the palace, and the hundred officials meet the court according to the routine, and the emperor orally proposes something, and the controversial one is discussed in the court.

There are some things that the emperor does not put forward in the court meeting, but "discusses" it to a certain range of officials, such as the "Jiuqing Conference" and the "Wang's Ministers' Conference", and then the opinions are played, which is called a meeting. The court or assembly was held to facilitate the emperor's decision-making.

In fact, that is, the three princes and nine secretaries are the frequent guests of the court meeting, and other officials will only be present at the meeting when they are talking about things. In Datang, it basically belongs to the three provinces and six departments, and occasionally the twenty-four directors will attend.

Let hundreds of officials of all sizes in Beijing attend the court meeting every day, which is to act on television. In fact, in the vast majority of cases, the court discussion is a small circle.

It was the first time he was notified to participate in the early dynasty, which made Chen Ying very surprised. Chen Ying, a military attache involved in foreign affairs, basically has no chance to participate in the court meeting at other times, except for the qualifications to attend the court meeting at the beginning of the year.

Chen Ying was also very nervous when he participated in the court meeting. He guessed that it might be related to Liu Wenjing's bullet seal. At the same time, it also indicates that Chen Ying has entered the ranks of important ministers of the country.

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