Dress to be a celebrity

...Hold on, this is a sample question with an answer!If you really use the ancient method to calculate, it must not be faster than modern mathematics!

Song Shi refused to let the ancients underestimate the mathematics level of modern people, and wished he could roll up his sleeves and teach him modern middle school mathematics.Huan Ling didn't notice his small thoughts, and pointed to the picture and said: "This is an example of the oblique quadrature method in the "Nine Chapters of the Shushu". The oblique quadrature algorithm is not difficult. Width, with the two approximations, you get "send"; then calculate the "inner rate" of the right three obliques: subtract the west oblique power from the middle and long power, and the remaining is considered to be real-the technique says that "realness is always negative", here the middle and long self Multiply the number 570 minus the west oblique multiplication to get 670, the result is minus one hundred..."

Yes, he understands negative numbers.There is no need to talk about anything else, just give him a formula and let him apply it.

Song Shi's heart was barren.

It's a pity that Brother Huan Xiao didn't understand what was on his mind, so he explained the problem carefully from the beginning, and by the way explained the basics of solving the problem-the "Shao Guang Shu" in "Nine Chapters of Arithmetic", that is, the method of division.In addition to fractions, the triangle area formula, power and root calculations are also used in the problem-solving process, and the algorithm is extremely complicated.

But this algorithm also has a little advantage, that is, when calculating the field product, as long as the side length of the figure and the middle length from the tip to the bottom are measured, it can be put on another quadrilateral as well.In this era of limited measurement capabilities, it is a very practical algorithm to calculate the land area using the side length alone.

If he does it, he can only divide the picture into two triangles first, use the Pythagorean theorem to calculate the length of the third side of the right triangle, and then calculate the height of the left triangle...

Forget it, the Pythagorean Theorem existed in the Shang Dynasty, and if he knows how to use it, he won't be able to crush anyone.

Song Shi quietly gave up the idea of ​​crushing the ancients, and tried to concentrate on listening to Huan Ling's lecture.Brother Huan Xiao not only talked about the sample problem of the area of ​​the slant, because there are two places in the problem that need to calculate the square root, he also taught him the formula of positive and negative.

The most famous Zengcheng Kaifang technique in the Song Dynasty.

This is really hard to learn.Not to mention its historical significance, just from the practical point of view, in today's era without calculators and practical square root and cube root tables, it is also a useful skill to learn the square root by yourself.What if food, earthwork, water storage and so on can be used in the future?

Song Shi squinted his eyes, staring intently at the nib of the little senior brother's pen, wishing he could even make a grid in his heart.From top to bottom, the grid is written with the words Shang, Shi, Xufang, Shanglian, Xialian, Yiyu, etc., and the corresponding numbers are listed below the words...

Each frame is numbered in the order of top and bottom, and there is a carry, which is a bit like a vertical format; the counting is not Chinese characters but decimal Suzhou grass codes, which are similar to Arabic numerals when you are used to it.

He exerted a strong subjective initiative, and insisted on finding a little intimacy in this dizzying grid. He watched Huan Ling deduce the numbers step by step, and finally eliminated the "real" to find the "quotient" of the cube root. .

Huan Ling put down his pen, turned his face to look at him, and asked with some expectation: "How? Do you understand what I just said? If there is anything that I didn't explain thoroughly, tell me, and I will say it again."

Song Shi looked at the form on the paper, then looked at the little senior brother, slowly squeezed out a smile, and said sincerely: "Senior brother is so good at arithmetic, you can save a penny after you take office."

Huan Ling understood what he meant, shook his head and smiled and said, "Then I have really been praised by the third brother. If the third brother needs someone to calculate the acres of land, grain, construction materials, etc., he will tell Brother Yu that I will replace it for you." Uncle will do it with you."

Song Shi sighed slightly: "When we lived together in the same courtyard, we only saw you studying classics, but never saw you touch miscellaneous subjects. Unexpectedly, after four years of seeing each other, you have become a master of mathematics today."

Huan Ling said modestly: "I'm not a great master, but I didn't have much to do when I kept my filial piety. I followed a senior uncle who worked in the household department to read some books by famous mathematics experts in the previous dynasty. You just haven't laid the foundation before, and you suddenly heard It’s a bit unfamiliar, just wait and see more.”

... Well, it's a matter of opinion.Adding up his two lifetimes, even though he was still old enough to be elected as an outstanding youth, he was not good at comparing with young people in terms of academics.

Song Shi smiled, patted the little senior brother on the shoulder old-fashionedly and said: "This time, it's up to the senior brother to clean up Yintian." In order to show his sincerity, when the banquet came at noon, he dragged the little senior brother to sit in the main seat, and personally replaced him He served a few dishes and poured a glass of wine.

Although the banquet was in a flooded place, the arrangement was still very sumptuous, but it was a bird's nest banquet: there were twelve dishes in the main banquet, six big and six small, and the main course was a cake cut into lily pieces as the base, with shrimp Meat, chicken slices, stone fungus, first-class bird's nest steamed in clear soup, chicken, duck, fish, crab, seaside special squid, etc.

In Beijing, there are only dried squid sold by Nanhuo shop. Although Wuping is a mountainous area, Fujian is close to the sea after all. There is always a way to transport fresh squid. It is a crispy and delicious delicacy when it is cooked lightly.Most of them are fresh fish—there have been floods in various places these days, and the big fish several feet long in the river have been washed out by the water, and they can be found everywhere. Fish don't care about money."

It's a pity that there are no good bamboo shoots this autumn, only smoked dried bamboo shoots.

Song Shi scooped up the bird's nest, picked up a few pieces of squid, and gave Huan Ling the live meat off the tail of the fish with two chopsticks, slowly peeling the crabs.

A few years ago, he worked with his father in Guangxi. He had plenty of crabs, but he was not particularly greedy. He mainly peeled them for the little brothers from Beijing.However, the students of Linquan Society have to pay attention to a "celebrity demeanor", that is, "cleaning gluttony", and show a habit of cherishing rare delicacies.Therefore, when this group of people saw dried smoked bamboo shoots, it was like seeing Wang Ziyou, who lived a thousand miles away; Poetry must flourish.

Song Shi was still busy with crabs in his hands, but his eyes were extremely focused on the scholars.

All he wrote before were research papers on the lives of the common people. Now that he has passed the student examination, he is about to start writing new articles based on the daily communication and entertainment activities of the students in the "Ming Dynasty".

When he writes a new paper and publishes it on Jinjiang, he will have money in his balance and can buy it again!

He looked affectionately at Lin Zeng (Guang) Sheng, who held his claws and chanted, as if looking at the balance of his account; Wang Linsheng, who gracefully picked crab meat with copper scissors and spoons; Lie, bad hills are the head of the case in Penglai", Zhao who wiped sweat for the beautiful boy...

Oh, don't look at this one.

He silently turned his eyes away, and glanced at Huan Ling out of the corner of his eye, but saw that the little senior brother was also looking at those scholars who were mad, but there was a faint disapproval in his expression.

He stood up subconsciously, blocking Huan Ling's sight, not wanting him to be polluted by the customs.When the table full of scholars saw that the master got up, those who recited poems stopped immediately, and those who went mad also stopped. They all thought that he was going to toast, and each lowered their heads to look at the wine glasses. Raised a few points.

Song Shi came to his senses, hurriedly picked up the wine glass, stretched his face and said solemnly to the sentient beings: "Today's good banquet should be in time for merrymaking, but now the flood outside has not receded, and there are still people suffering in front of us. It is already time for us to drink here." Too much enjoyment, how can you bear to be as happy as usual? You virtuous brothers, don’t blame me for disappointing, there are poems and articles today, and they should be the words of minnong.”

The faces of all the students showed embarrassment, Zhao Yueshu was even more embarrassed that there was a beautiful woman to cuddle with, and he raised his hand first to respond: "Brother Song Xian is right! We all wrote articles asking the imperial court for disaster relief, and when it comes to literary grace, vertical and horizontal style, it is no worse than poetry , why not just recite it here, and we all cry for the disaster victims!"

Without waiting for Song Shijing, he drank the wine in his hand first, and chanted emotionally: "God is not merciful, the rain falls like a hanging river; the small people are only difficult, and the fields become vast oceans..."

When the literati's passion comes up, Huazhang gushes out from the bottom of his heart, which is different from what he usually writes while sitting.But this kind of inspiration is also released in a flash. If they don't write it down, they will forget it when they calm down later.

After Song Shi heard a few words, he asked someone to bring a pen and paper, and wrote down the key anchor points on the paper according to the memory method he had learned from reciting papers over the years.A few talented scholars just stood up one by one to recite the essays, while those without talents sat in meditation and pondered, all of them were concerned about the country and the people, which raised the level of this party Quite a lot.

After this meal, the crabs were rarely eaten, but they made a stack of papers.

Under the enthusiasm of all the members, the efficiency of the composition was higher than that of the dry morning. When Song Shi slowly restored the full text, compared with the previous manuscript, there was a feeling of "I only know who I am today".

Lin Linsheng said excitedly: "In the past, when I was writing at home or at school, I often felt sluggish in my writing. Today, I have written a lot of writing, and I wrote good sentences at my fingertips. It doesn't seem like I wrote it! Song Xiandi, is it possible that the yard is full of people? What kind of immortal energy can make people enlightened?"

Many students felt this way. Those who were superstitious thought that they were petitioning for the disaster victims, and the gods bless and protect them; Talented scholars from Beijing, they must have been imbued with the literary spirit of these two people.

Song Shi answered silently in his heart: "This is called brainstorming."

In his previous life, the marketing director of their travel agency—just his classmates—had read a few best-selling books, and when he had nothing to do, he liked to hold collision meetings with planners and designers, and always said that brainstorming would lead to good plans.

I didn't see how useful it was at the time, but after traveling through 18 years, I saw it.

He did not shatter everyone's illusions, and even enthusiastically encouraged these people to come to him whenever they wanted to worry about the country and the people, or write poems and compositions.The manuscript he had silently distributed was also distributed to everyone, and he asked them to go back and copy it carefully, sign it and sign it, and then he would gather some petitions from the old villagers and hand them over to the mansion.

If everyone really loves these articles, when the court relief is settled, he will work and collect them into a book, and when he has a chance to compile the county annals later, maybe he can add their names to the characters or the art and literature annals.

One sentence aroused the hearts of all the scholars to make contributions, and they went back to write articles and donate food and materials without mentioning it.Huan Ling also wrote an article, but he didn't want to show it to the scholars. Instead, he waited for everyone to leave before writing it down.

It is not an article that is parallel, four and six, and that captures people with emotion, but it writes the harm of floods and the suffering of the people more profoundly than those gorgeous poems.Moreover, this article was something the Song family had to use right now - he followed the tone of the county magistrate and drafted a detailed article for Mr. Song to explain the disaster situation to his superiors and ask the court to help the victims.

After Song Shi took that article, he didn't want to let go, and said "thank you" a lot, afraid that he would not be sincere enough, and said: "I will treat you to crabs when I go home."

Huan Ling smiled and shook his head: "Although the crab is delicious, peeling it is troublesome. I am not good at peeling this, and I am not willing to peel the shell and remove the meat for me with your hand holding a pen. I only need mooncakes with date paste and shochu. Let the guests follow the master's convenience, and let the third brother arrange it."

The author has something to say:

Bamboo shoots are like earth, and river fish don't care about money.Author Yuan Zongdao