Three Kingdoms: Divine Choice

After the scholar approached the pavilion with Su Yan and Xun Chen, he whispered: "Mr. is wearing a sky-blue robe, and the old man who is talking to Mr. next to him is the queen of the Lu royal family, named Liu Hong. "

"Mr. Liu Shihe is also a teacher and a friend, and both like arithmetic. The middle-aged man sitting on the inside was named Xu Yue, a disciple of Master Liu, and he was also proficient in arithmetic. "

"Mr. Liu and Mr. Xu only arrived in Ye County today, and after they arrived at the house, they didn't have time to rest, so they talked directly with Mr."

"Liu Hong is actually here?"

When Xun Chen heard this, ~ he couldn't help but exclaim in a low voice.

In Shilin, Liu Hongbi is not as famous as Zheng Xuan.

However, in arithmetic, astronomy, and political achievements, Zheng Xuan cannot be compared with Liu Hong.

Moreover, Liu Hong is an authentic royal clansman, with high seniority and respectful status.

Su Yan's eyes also showed surprise.

This time, even characters like Liu Hong came quietly, and it seems that it is really not simple.

Su Yan took a deep breath, calmed himself down, and under the guidance of the scholar, he came to the pavilion and sat down.

Liu Hong and Zheng Xuan were discussing the problem, but they just glanced at Su Yan and Xun You, and their minds returned to the discussion of arithmetic.

Su Yan and Xun You sat quietly, listening to Zheng Xuan and Liu Hong talking.

"Brother Yuan Zhuoxian, don't argue. Your algorithm, obviously wrong, no need to argue. "

Zheng Xuan stroked his beard and denied Liu Hong's words.

Liu Hong was not annoyed, and said unhurriedly: "Brother Kang Cheng, I can get the right result, why is it wrong?" Our problem is: looking at the seven floors of the tower, the red light is multiplied; There are 381 lamps in total, how many lamps are there on the top of the tower? "

"The question is, I made bold assumptions, reasoned carefully, and finally came up with a total of three lights on the top of the tower, what is wrong with that?"

Zheng Xuan snorted and said, "Brother Yuan Zhuoxian, arithmetic is not like this. At first, you assume that there is a lamp on the top of the tower, and after doing the math, the result of one lamp is not enough; Then, assuming that there is a lamp on the top of the tower, the result is still wrong; Finally, you assume that there are 3 lights on the top of the tower, and after this calculation, the result is correct. "

"The results are in, but how do you explain it? Is it necessary to assume from the beginning when encountering such a problem, and if so, what is the point? It's better not to calculate, it's not arithmetic. "

Liu Hong snorted angrily and said, "Then you say, do you have any way to answer?" "

Zheng Xuan frowned, his eyes solemn.

The hypothesis put forward by Liu Hong can get an answer, but it is difficult to have a specific law.

However, Zheng Xuan didn't have any other ways to solve the result, which was a headache.

Xu Yue interjected, "Teacher, where did you two get this question?" "

Liu Hong said: "An ancient book! "

Su Yan, who was on the side, blinked.

The topic discussed by Liu Hong and Zheng Xuan is recorded in the "Algorithm Tongzong" compiled by the Ming Dynasty mathematician Cheng Dawei.

However, Cheng Dawei's topic is slightly

The slight change hides the calculation method from the top of the tower, and it is very complicated and difficult to start the calculation from the lamp on the top of the tower.

Zheng Xuan said with emotion: "This arithmetic problem is really difficult to solve. When I was talking about the sermon, I had to put this question up and brainstorm ideas in the hope of coming up with a solution. "

Su Yan said: "Master Zheng, Master Liu, I can answer." "

"Oh, can you answer that?"

Zheng Xuan's eyes were excited, and there was not the slightest contempt in his eyes.

Liu Hong hurriedly said: "Tell me quickly, how to answer?" "

There was a look of surprise in the eyes of the two old gentlemen.

However, Xun Chen, who was next to Su Yan, couldn't help but swallow his saliva.

He stared at Su Yan and thought: This time, the lord is too reckless, he shouldn't just talk nonsense in order to gain the favor of Zheng Xuan and Liu Hong!

Xun Chen felt that he knew Su Yan's situation very well, and he didn't believe that Su Yan could calculate it at all.

Su Yan looked confident, and said unhurriedly: "Yuan Zhuogong has already said the final result, if I talk about the result, it is obviously meaningless." That being the case, prepare the pen, ink, paper, and inkstone, and I will tell you how to answer this question. "

"Someone, prepare pen and paper!"

Zheng Xuan ordered, stood up and said, "Little friend, sit here with the old man, and the old man will see how you calculate." "

Su Yan immediately got up and walked to Zheng Xuan's side and sat down without concessions.

Xun Chen's eyes widened, and his heart was pounding and jumping.

His heart beat faster and he directly thought that it was difficult to end the matter.

Xun Chen was anxious in his heart, but Su Yan was in the chest, and Xun Chen could only wait and see what happened.

After a short time, the scholar brought a pen, ink, paper, and inkstone and placed it on the stone table.

Su Yan took the brush and wrote it down.

A very simple equation was announced, and the final answer was directly obtained.

·· 0 begging for flowers····

However, Su Yan could understand this equation, Zheng Xuan, Liu Hong, Xu Yue, and Xun Chen, who was sitting next to him, were in a fog and didn't understand what was going on.

Especially the strange symbols written by Su Yan made several people even more inexplicable.

can see that Su Yanxu has a pretentious appearance, and the answer he finally came up with is the same as Liu Hong, like that.

Suddenly, Liu Hong's eyes lit up and said: "This painting is vigorous and powerful, Your Excellency is Su Cheqi?" "

Su Yan smiled: "It's exactly below!" "

Zheng Xuan arched his hand and said: "Zheng Xuan, the man of the mountain village, meet the adults!" "

There was a hint of respect in his tone.

Su Yan hurriedly said: "Kang Chenggong is polite, you and the family teacher are friends, it is already good to be able to come to Jizhou in person, no need to salute." "

................ 0

Su Yan's solution just now made Zheng Xuan very curious.

Zheng Xuan went straight to the point and said excitedly: "Can you explain it, what is going on?" How is it calculated. Just a few simple words, listing a bunch of strange symbols, how to figure it out. "

In ancient history, there was a multiplication table for "Ninety-Nine Songs" very early.

However, the multiplication table for the "Ninety-Nine Songs" is an oral tradition, and there is no record of how it was written.

Like many ancient techniques, they were passed down orally from beginning to end, with no clear canonical records.

There are no punctuation marks such as addition, subtraction, multiplication, and division, and there is no punctuation even for the articles that are read.

More attention is paid to reading a book a hundred times to see its meaning, so that those who read read more books and gradually understand its meaning.

After Zheng Xuan, Liu Hong, Xun Chen and others saw it, they didn't understand what was going on.

Su Yan scratched his head, and after organizing the wording, he briefly talked about the plus, multiplication, division, and equations. After finishing speaking, he elaborated carefully again, so as not to make Zheng Xuan and Liu Hong unable to understand.

Rao is like this, Zheng Xuan and Liu Hong are still confused.

Su Yan elaborated several times in a row, and the doubts in the eyes of the two people eased slightly, but they didn't really understand.

Zheng Xuan is a person who likes to explore, and said: "After listening to what the adults just said, punctuation, as well as addition, subtraction, multiplication, and law, have a complete system. "

"The grass people want to ask adults to write books and publish them. In this way, all the people in the world have benefited from it. "_

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