After school, Fei Chun was sent to the cafeteria to wait for food, while Pang Chunlai went to the hut to have a stomachache.
Fei Yuanjian stayed in the classroom stupidly, fidgeting as if he had ADHD. He didn't want to make up classes every day, but except for Zhao Han, the other students didn't play with him, and even laughed at him when they saw it.
Is it so difficult to sit well as a student?
Fei Ruhe was in a similar situation. He was flipping through "Algorithm of the Tongzong" in his hand, and his thoughts were already wandering to the sky. Hell, arithmetic is more difficult than the Four Books.
Finally, Fei Ruhe couldn't help but said: "Sir, you took a dump and haven't come back for a long time. You must have a stomachache. I don't think you need to learn any more arithmetic today."
"Yes, yes, there is no need to study anymore." Fei Yuanjian quickly agreed. He came here to make friends, not to study hard together. With his knowledge base, if he really wants to make progress, he must first go back to the Mongolian School.
Revisiting children's books.
Xu Ying did not dare to speak. Although she was no longer so afraid, she still had a barrier with the rich young master.
Zhao Han smiled and said: "Then you go to practice martial arts in the bamboo forest."
Fei Ruhe, who had already stood up, sat down again after hearing this and said with a smile: "If you don't want to go, then I'd better stay."
Fei Ruhe also had a guilty conscience, and he had a hand in posting the big-character posters, so he did not dare to be alone with Fei Yuanjian.
"Haha, then I'll stay and study too." Fei Yuanjian echoed with a silly smile. He had nowhere to go. He had offended too many classmates in the past, and he would easily be beaten by a group once he was left alone.
Fei Chun ran back and forth several times and finally brought everyone's meals.
Not long after, Pang Chunlai also returned to the classroom, picked up his chopsticks and said: "Learn while eating. This arithmetic is more practical than studying Confucian classics. From now on, whether you are local officials, marching and fighting, or managing family businesses,
Arithmetic is definitely useful."
"Yes." Fei Ruhe, Fei Yuanjian and Fei Chun all looked sad.
Xu Ying sat upright and eagerly waited to learn new knowledge.
As for Zhao Han, he remained silent throughout the whole process, immersed in familiarizing himself with various related terminology in ancient times.
For example, "length" and "width" are often called "wide" and "conong". If you don't understand this, it will be useless no matter how good you are at mathematics. You won't even be able to understand the questions.
Another example is the unit of time, hour, moment, update, point.
There are 12 hours in a day and 2 hours in an hour. Everyone knows this.
There is some trouble in keeping track of time. In the past, Western clocks used to mark 100 minutes a day, but then changed it to 96. I heard that someone in Beijing suggested changing it to 108, but it was a mess anyway.
In addition, there are also very common time units such as seconds, awns, and blinks.
Moreover, Zhao Han was surprised to find that "Zhou" actually existed in ancient China, and it has been used for two thousand years.
The average week has 7 days and the leap week has 8 days. During the Qin and Han Dynasties, it was used to determine working days. Imperial officials only worked 6 days a week. Because of the trouble of converting ordinary weeks to leap weeks, it was not used much later. It is more intuitive and convenient to use thirty days per month.
The word "week" also exists, specifically referring to the seventh day of July, and is derived from the date of wedding.
The week is approaching, and the wedding day is approaching.
Zhao Han was already familiar with arithmetic, but then he was reluctant to learn it and pestered Pang Chun to explain various units and terminology.
≡⊥＝‖_×
Can you see what the above means?
The decimal number in the arithmetic version must be half a square short).
In fact, as long as you get used to it, they are no different from Arabic numerals, they are just different symbolic expressions.
…
Seeing that Zhao Han only focused on professional terminology and did not like to learn basic arithmetic, Pang Chunlai smiled and asked a question: "Zhao Han, can you calculate it?"
It is true that Zhao Han has progressed too quickly and is obviously tired of studying. He needs to work hard on his debut!
Xu Ying, Fei Ruhe, Fei Yuanjian and Fei Chun read the questions curiously, and then were collectively dumbfounded.
The content of the title is roughly: "Only 280,000 shi of military rations are left on the front line, and 7,000 shi are consumed every day. If the food supplies are transported, it can be reached in 25 days, and 1,000 shi are consumed per day on the way. How much food needs to be transported to enable the frontline soldiers to last for 90 days?
?”
Xu Ying thought carefully about how to solve the problem, and her mind was in a state of confusion. He had just started learning multiplication.
Fei Ruhe couldn't help but said: "Sir, aren't you making things difficult for others?"
"I didn't ask you to solve the problem," Pang Chunlai looked at Zhao Han with a smile, "If you can't solve it, just practice it honestly from now on!"
Zhao Han did not answer the question immediately, but asked: "After the food transport team completes the military order, should they stay on the battlefield and wait for ninety days, or should they immediately return the same way? In other words, after transporting the military food, they will not care about the life or death of the food transport team. Mr.
The question is vague and has three different answers.”
Pang Chunlai laughed loudly: "It's rare to have a thoughtful mind. Please figure out all three solutions."
Zhao Han picked up the straw paper, assumed that the number of grains transported was X, and then started to make equations.
A linear equation of one variable is just a primary school question.
Three quick answers came up.
All the students were immediately shocked. Whether they were good students or bad students, they all looked at Zhao Han with admiration.
Pang Chunlai snatched Zhao Han's calculation script, and the strings of mysterious codes made him dizzy. Modern equations were a sacred book to him.
"Which country's characters are these?" Pang Chunlai asked confused.
Zhao Han tentatively asked: "Sir, do you know Xu Guangqi?"
Pang Chunlai nodded and said: "Although I have never seen Xu Guangqi as my teacher, and I don't even know his name, I have heard of his name for a long time. After the defeat of Saarhu, he was ordered to organize and train a new army in Tongzhou. Now that the new emperor has ascended the throne,
According to the Chaotingtang newspaper, he has been reinstated as an envoy to the Qing army."
The Qing army is to check the status of the army, including general officers, troop levels, training, food and pay, ordnance, etc.
Xu Guangqi's current duty is to clean up the Ming army.
Since Pang Chunlai has never seen it, Zhao Han can just talk nonsense.
Zhao Han opened his mouth without even blinking: "There was a missionary from the West named Matteo Ricci, who came to the Ming Dynasty with "Elements of Geometry". Xu Guangqi translated this book, and my father was lucky enough to read it during his lifetime. These numbers are all from Western legends."
Come."
"Tell me about it." Pang Chunlai was immediately interested. He asked the children to eat and do problems while he asked for advice on Western arithmetic.
Zhao Han wrote out Arabic numerals and various arithmetic symbols, and marked Chinese characters below them one by one.
Pang Chunlai was not fond of Arabic numerals, but was surprised by the convenience of Western arithmetic symbols. However, if he wanted to introduce those arithmetic symbols, he had to cooperate with Arabic numerals.
The calculation expression is not possible, because the "4" in calculation looks exactly like the multiplication sign, and the "2" looks almost like the equal sign.
Pang Chunlai could only forcefully compare the two characters, and then look at Zhao Han's equation.
"This is Tianyuan Technique!" Pang Chunlai slammed the table.
Xu Ying and San Fei, holding chopsticks in their hands, looked over stupidly. They didn't understand the stupid meaning at all.
Tianyuan Technique is an equation.
Pang Chunlai then said: "This is the Tianyuan Technique of Taixi. It only lists one element. Can you explain two, three and four elements?"
Zhao Han asked curiously: "Sir, can you use arithmetic to solve the four yuan problem?"
Pang Chunlai shook his head and said: "Some people know it, but I don't. It is said that Zhu Shijie, a master of arithmetic in the Yuan Dynasty, once created the four-element solution. But I have only read his "Arithmetic Enlightenment" and have not had the opportunity to see his "Four-Element Jade Mirror"
"A book. Without going into too many details, let me pose a question and you can use Taixi's Tianyuan Technique to solve it."
Soon, a question came out.
Zhao Han solved the problem using a linear equation of two variables and handed over the solution: "Sir, please take a look."
Pang Chunlai was not familiar with Arabic numerals, so he could only compare them and check them slowly, then clapped his hands and praised: "Wonderful, wonderful!"
Using arithmetic to solve linear equations of two variables is actually very fast, and its efficiency is not inferior to linear equations.
However, the problem-solving process of calculating Tianyuan Shu is more complicated to express on paper and is far less simple than equations.
If it is a two-dimensional quadratic question, then Yuan Shu will be even more complicated!
Pang Chunlai laughed loudly: "This technique is so ingenious that I come to teach it as a teacher."
Students teach teachers?
Xu Ying and Sanfei were even more shocked, feeling that Zhao Han was really awesome!
Pang Chunlai said to the four of them: "You should also learn together."
Since then, their arithmetic learning speed has doubled compared to before, and even Fei Yuanjian found it easier.
After all, they are not fools.
Fei Yuanjian's relationship with everyone has always been very delicate.
He was like a sticky candy every day, reading, practicing martial arts, and learning arithmetic together. Xu Ying quickly accepted him, but the others had a knot in their hearts, and they always had reservations.
The winter solstice arrives in a blink of an eye.
The Martyrs' Archway has been repaired, but the approval from the court has not yet come out.
This thing needs to be approved by the government at all levels, and then it can be bestowed in the name of the emperor.
But by the end of the Ming Dynasty, basically just give money.
The slower one goes to the county magistrate, the faster one goes to the censor. After it is sent to the court, the emperor doesn't care at all. The cabinet directly passes it to the Ministry of Rites, and the officials of the Ministry of Rites can approve it with money.
The Chastity Arch is also exclusive to the rich!
Because the imperial court only allocated thirty taels of funds, it was not enough to erect an archway, and more money was needed for up and down management. People with no money and status, unless local officials were motivated by political achievements, would not be able to erect an archway no matter how loyal they were.
Etiquette cannibalism?
Sorry, if your family has no money, you are not even qualified to be eaten.
(Please give me a monthly ticket or a recommended ticket. Friends who read books on the Internet, this book is the first release, you can download the "Qidian APP" and come and do it together.)