"That's okay? But that's not what my mother said when she taught me, and there's no mention of being able to do mental arithmetic in the book, right?"
Ru Lan still couldn't believe it. Qi Heng couldn't figure out such a complicated question on paper for a long time, but Wei Chen actually answered it by opening and closing his mouth.
Looking at the cute look on the little Lolita's face, Wei Chen patiently explained: "The technique of slanting fields has a cloud, and it can be divided into two parts diagonally. It can be used to multiply the upright and follow Ruo Guang, and it can be half upright and follow Ruo Guang, to multiply and merge. , the mu method becomes one. There is also a cloud in Ji Tian Shu, and the heel tongue is cut in half, so as to take advantage of it, the mu method becomes one."
Rulan nodded. What Wei Chen said was all about arithmetic in the Nine Chapters. Wang Ruofu had taught her before.
Wei Chen paused and continued: "Both of these methods, in the final analysis, are actually the area of a trapezoid. You only need to remember that adding the upper and lower bases, multiplying by the height and dividing by two, all calculations of the area of a trapezoid You can put them all in. As for the volume of the dam you are asking for in this question, you only need to calculate the area of the trapezoid in the cross section and then multiply it by the width to get it. "
Ru Lan listened for a long time and felt that she heard every word Wei Chen said clearly, but she just didn't understand them all together.
Wei Chen had no choice but to take out the piece of bamboo paper with the title written on it from Ru Lan's hand, and listed the formula one by one on it: "Add the upper wide plus the lower wide divide by two, then multiply by the height, and finally multiply by the breadth, that's it." , you can do the math yourself."
When Wei Chen took the bamboo paper away from Ru Lan's hand, his fingertips made momentary contact with the skin on Ru Lan's forearm. Wei Chen was in a hurry to lecture Ru Lan and didn't pay attention.
On the contrary, Ru Lan, who looked carefree, was more sensitive. Her face turned red and she quickly retracted her hands into her sleeves, her mind in chaos.
Seeing Ru Lan standing there with a dumbfounded look on his face, Wei Chen was angry and amused, so he couldn't help but ask: "How many years have you been studying Confucian classics?"
"Three years."
"Three years, look at you, what have you learned in these three years?"
Wei Chen pretended to be a young gentleman and taught him a lesson: "You will be running a household in the future. Corn, hired servants, and monthly calculations are not allowed to be used in calculations. If you don't even understand these calculations, how can your future husband rest assured?" I entrust you with the matter of Zhongzhi?"
"I..., I..., I..."
After hearing what Wei Chen said, Rulan was really ashamed and angry, her ears turned red.
Just now you touched me and there was no explanation. Now you brought up the matter of hosting the family!
When will I become a housewife, and what does being a housewife have to do with you?
snort!
Ru Lan gave Wei Chen a hard look with her eyes, and without saying a word, she angrily returned to the table and began to fiddle with the calculations on the table.
Where did I say the wrong thing?
Wei Chen, who was left standing there, had a puzzled look on his face, and then he shook his head dejectedly. It seems that I, a young gentleman, do not have enough authority to control these spoiled young ladies, so I have to find an opportunity to establish my authority!
Who will do the surgery?
Wei Chen's eyes swept across the people below, and finally rested on Sheng Changfeng's head.
Sheng Changfeng, who was concentrating on writing silently, suddenly felt like he was being watched by someone.
He raised his head and looked around, but found nothing, so he had to curl his lips and continue his homework.
Not long after Ru Lan left, Mo Lan and Ming Lan also came up to hand in their homework.
Mo Lan stumbled through the 300-word passage of "The Female Ring" and made several mistakes. Wei Chen pointed them out one by one.
Mo Lan bowed down to receive the instruction, and after politely asking Wei Chen for instructions, he left the school and returned to Lin Qi Pavilion.
"You seem to be respectful, but in fact you are afraid to avoid me. You must have been asked by Lin Sushuang to keep a distance from me, right?"
Wei Chen looked at Mo Lan's leaving figure and shook his head. He could pull Sheng Changfeng back to the right path, but he was powerless against Mo Lan.
After arriving in Bianjing, Sheng Changfeng had moved out of Linqi Pavilion and had a small yard of her own, right next to her second brother Sheng Changbai. Under the supervision of Sheng Changbai, she stayed away from worldly affairs and concentrated on studying. Even her biological mother Lin Sushuang had to go to see her. Obtain Sheng Hong's consent in advance.
But Mo Lan is a girl and cannot be as independent as the boy Chang Feng. She still has to get along with Lin Sushuang day and night. Under the influence of what she hears and sees, her character will inevitably be affected.
Zhuang Jun has experienced the world and has an insight into people's hearts. In one morning, he was able to see Mo Lan's mind and temperament, so he asked Mo Lan to recite "The Women's Ring". After all the painstaking efforts, he didn't know how much Mo Lan could understand.
After Wei Chen sighed with emotion, he withdrew his gaze, looked at the restless little guy standing in front of him, and said with a smile: "Okay, it's your turn, please hand in your homework."
"Little sir, please give me some advice." Minglan smiled and handed over a stack of paper soaked in ink.
The homework assigned by Zhuang Jun to Minglan was to write fifty "Yong" characters, referring to the eight methods of "Yong" used by Wang Youjun to practice calligraphy. This is also a commonly used method for teaching calligraphy beginners.
The first character in Lanting's preface is the character Yong. The character Yong has only five strokes, but it contains eight styles including dots, horizontal strokes, vertical strokes, and so on. It can be said to include all the changes in calligraphy. Therefore, there is a saying that a well-written Yong character can cover everything.
The reason why Zhuang Jun asked Minglan to practice calligraphy was because he saw her restless little heart and wanted to test her patience.
Wei Chen took the pile of paper that Ming Lan had written and flipped through a few pages, and several adjectives suddenly popped into his mind: spring leads to autumn snakes, crooked, messy, unsightly, miserable...
Wei Chen had a dark face and looked up at Minglan in front of him: "Did you write these words?"
Minglan blinked her big eyes and looked at Wei Chen innocently.
Wei Chen laughed angrily: "That's right. Who else can write such a masterpiece besides you? I think Xiao Tao's ghost drawing skills are better than yours!"
After being criticized, Minglan still didn't take it seriously. She winked at Wei Chen and said, "Cousin, we are a family. Just be accommodating and let me pass."
"I am tolerant to you, who is to be accommodating to me? It is precisely because you and I are related that I have to be stricter with you!"
Wei Chen was very angry at Minglan's playful smile, which meant that he didn't have a beard, otherwise he would have to perform a mustache blowing glare for Minglan.
Minglan also knew that she was being unreasonable and smiled: "Cousin, my mother asked me to practice calligraphy and meditate half a year ago. I have practiced for many days but I haven't made any progress. Although Mr. Zhuang taught well, I can't see it right away. It's getting better, if you allow me a few more days, maybe in ten days and a half, my brain will suddenly be enlightened?"
"You, you, are always good at making excuses!"
Wei Chen pointed at Minglan and said angrily: "I think you are just busy playing around and haven't paid any attention to your homework!"
"Cousin~~"
Minglan used her coquettish skills to pester Wei Chen and beg in a low voice.
Wei Chen was unmoved at all and remained unselfish. He threw the bunch of ghost talismans handed over by Minglan on the table and said in a deep voice: "You will be punished to go back and copy "University" and hand it over to me in morning class tomorrow!"
Minglan felt a pain in her face when she heard this. Although "The University" is the one with the fewest words among the four books, it still has nearly 2,000 words. If she really had to copy them all, she wouldn't have to sleep tonight.
Minglan clenched her little fists angrily, and was about to protest against Wei Chen's tyranny, but she heard Wei Chen say calmly: "It's okay if you don't accept the punishment. After evening classes, I will go to Qinyun Courtyard, Talk to your aunt about your performance in school today."
Hearing that Wei Chen was so shameless that he even sued his parents, Minglan despised Wei Chen in her heart, but she was still very honest.
"Isn't it just copying the book? I'll copy it! I promise to hand it over to you, Mr. Xiao, before class tomorrow morning."
