"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?"
Ru Lan still couldn't believe it. For such a complicated question, Qi Heng couldn't figure it out on paper for a long time, but Wei Chen actually opened and closed his mouth and came up with the answer.
Looking at the cute look on the little Lolita's face, Wei Chen patiently explained: "The technique of slanting fields has its meaning, and it can be divided into two parts diagonally, so as to multiply the upright and follow Ruo Guang, and half upright and follow Ruo Guang, and to multiply and combine.
, the mu method becomes one. There is also a saying in the Jitian technique, 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: "These two methods, in the final analysis, are actually the area of the 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 the 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."
Ru Lan listened for a long time and felt that she could clearly hear every word Wei Chen said, but she just couldn't understand them all together.
Wei Chen had no choice but to take out the bamboo paper with the title written on it from Ru Lan's hand, and listed the formulas 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 instant 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 funny, 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 put on the air of a young gentleman and lectured: "You will be in charge of a household in the future. You must not use calculations on corn, servants, or monthly routines. If you don't even understand these calculations, how can your future husband trust you?"
I entrust you with the matter of Zhongzhi?"
"I...,I...,I..."
After hearing what Wei Chen said, Rulan was really embarrassed and angry, and 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?
Hum!
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 chips 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 depressedly. It seems that I, a young gentleman, do not have a strong authority and cannot control these spoiled young ladies. I have to find an opportunity to establish my authority! Who will perform the surgery?
Wei Chen's eyes swept across the crowd 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.
I raised my head and looked around, but found nothing, so I had to curl my lips and continue my 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 learned the lesson attentively, and after politely asking Wei Chen for instructions, he left the school and returned to Linqi Pavilion.
"It seems to be respectful, but in fact I am afraid that I will avoid you. Maybe you 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 saw Mo Lan's mind and temperament, so he asked Mo Lan to recite "The Women's Ring". After a lot of painstaking efforts, he didn't know how much Mo Lan could understand.<
/p>
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."
"Sir, please give me some advice." Minglan smiled and handed over a stack of ink-stained paper.
The homework assigned by Zhuang Jun to Minglan was to write fifty "Yong" characters, referring to the eight methods of "Yong" characters used by Wang Youjun to practice calligraphy, which are also commonly used methods to teach 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.<
/p>
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...
With a dark face, Wei Chen 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, besides you, who else can write such a masterpiece? 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 accommodating to you, but who is to accommodating 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 beard blowing and staring at Minglan.
Minglan also knew that she was being unreasonable, so she smiled and said: "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 become enlightened?"
"You, you, are so used to making excuses!"
Wei Chen pointed at Minglan and said angrily: "I think you are just busy playing around and haven't worked hard on your homework at all!"
"Cousin~~"
Minglan used her coquettish skills to pester Wei Chen and beg in a low voice.
Wei Chen remained unmoved at all and remained unselfish. He threw the bunch of ghost talismans handed over by Ming Lan on the table and said in a deep voice: "You will be punished to go back and copy "The University" and hand it over to me in morning class tomorrow!"
Minglan's face turned bitter when she heard this. Although "The University" is the one with the smallest number of words among the four books, it still has nearly two thousand words. If she really had to copy them all, she wouldn't have to sleep tonight.
Minglan clenched her small fists angrily, and was about to protest against Wei Chen's tyranny, but she heard Wei Chen said 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 resorted to suing his parents, Minglan despised Wei Chen in her heart. However, her body was still very honest.
"Isn't it just copying the book? I'll copy it! I promise to hand it in front of you, the little teacher, before class tomorrow morning."