Great Qin's son-in-law

Chapter 29 You and I are both Qin people!

Make Shi Chang go away.

Today's class in the classroom is also over.

Qin Luoheng and the others restored the room to its original state, and then began to pack up their own things. After packing up the things they needed to use when they got home, they were also ready to go home.

Qin Luoheng had nothing to take with him.

Just two volumes of letters.

He stood up, ready to leave.

Lang called to stop and said:

"Brother Qin, I may have to wait two days to give you the Qin Banliang agreed in the contract. Recently, my father is busy catching thieves and won't be returning home for a while. I hope Brother Qin can give you a few more days."

Lang felt a little embarrassed.

Qin Luoheng waved the contract in his hand and said with a smile. "I'm not in a hurry to use the money for a while. When you have money, give it to me."

"With the bond, you don't dare to renege on it."

Lang Hehe smiled.

"That is."

"I'm not a reckless person."

"By the way, Brother Qin's class tomorrow is arithmetic, so remember to bring your counting chip."

"But the arithmetic, you think it's enough."

"Anyway, people who don't fall in my section are confused about arithmetic now. Those little sticks don't know how to swing them at all, and Ling Shiqian also taught some verses. You probably haven't heard them before. Now It’s going to be a little hard to keep up.”

"Bless yourself."

"I'm sure I can't help with arithmetic."

"If you really find it difficult, go to Fen, that kid ran with his father in the market every day before he went to school, and he can do these calculations very quickly."

"I also ran outside since I was a child, why am I considered unhappy."

"His mother and maid!"

Lang muttered a few words, then left cursing.

Qin Luoheng was a little dumbfounded.

He wasn't really worried about his arithmetic.

No matter what he said, he had received compulsory education, and the basic mathematics was still up to standard, and the arithmetic in this period was far from being as complicated as that of later generations.

It's just that there are no numbers in this era.

If you want to learn arithmetic well, you must learn to count chips!

When the master was alive, he told him some content about counting chips.

Why count?

It is a tool for counting, formulating and performing various calculations of numbers and formulas.

And Huaxia has always used the decimal system.

When he heard this news back then, he was a little surprised.

Perhaps in the eyes of later generations, the use of decimal counting is a matter of course, but in the pre-Qin period, the decimal system was the greatest creation in the history of world mathematics.

none of them!

When China began to use the decimal system, ancient Rome was using the heptadic system, and ancient Babylon was using the sexagesimal system. Although ancient Egypt used the decimal system, it did not know the place value system.

The place value system is what a number represents, depending on its position.

In the pre-Qin period, the ancients knew zero.

It is precisely because China was the first country to use the decimal notation method and recognize the carry system, so for a long time, China has been the most advanced country in mathematics.

He asked his wife.

Why do we use decimal.

The master was stunned for a moment, then stretched out his hands, and said with a smile: "Have you ever heard of a word called "few to count?"

In the eyes of the ancients, it was natural to use the decimal system.

But they don't know it. It took the West thousands of years to understand what they took for granted.

The decimal system was thoroughly established during the Shang Dynasty.

The counting method has also developed step by step from the most primitive "Lishou counting", "knotting knots" and "carving wood records" to "counting chips" that appeared in the Spring and Autumn Period.

Under the teacher's explanation, Qin Luoheng also knew the origin of the calculation.

Suanchou appeared in the pre-Qin period, and it has been mentioned in "Yi Zhou Shu", "Chu Ci", "Dialect" and other books, but at that time, there was no unified regulation of Suanchou, and they were basically made of tree branches. , bamboo branches, thatch and the like.

With the unification of the Qin Dynasty, weights and measures were also unified.

Counting is naturally among them.

Qin law stipulates: "The algorithm uses bamboo, one point in diameter, six inches long, and 270 pieces to form six goblets (gu), which is one grip." '

but.

The Qin Dynasty paid attention to practicality.

Therefore, the foothold of classroom teaching is also to explain practical problems.

Fangtian, Corn, Decline, Shaoguang, etc.

Qin Luoheng had learned counting chips before, but when he was a beginner, he had lamented his own ignorance and stupidity many times, and also lamented the wisdom and cleverness of the sages many times.

Qin Luoheng immediately smiled and said:
"Lao Tzu said: Those who are good at numbers don't need to plan."

"When I was learning to calculate chips, I was often "chikao" by my master."

"The other historians in the school have no foundation at all now. When they learn the addition, subtraction, multiplication, and division of counting chips and the four arithmetic operations, I can already foresee the wailing in the school."

"Everyone in the world who can learn mathematics well is a genius."

"This is a wise saying!"

Qin Luoheng came back to his senses, didn't think about tomorrow's arithmetic class, picked up the packed things, turned and left the classroom.

It was getting dark.

He carried his burden and walked home on foot.

By the time we got back to our residence, it was already completely dark.

Bao Shu was waiting at the door early to welcome him home.

"How is your studies today, son?"

"When I was in the city, I heard people say that the courses in the school are more onerous than the six arts of Confucianism. It is not something ordinary people can understand, but with your knowledge, you will not encounter any difficulties." Seeing Qin Luoheng, Bao Shu hurriedly came up to meet her.

Qin Luoheng shook his head and said:

"You are wrong."

"There is no substantial difference between what Xueshi teaches and what Confucianism teaches, but Confucianism pays more attention to benevolence and propriety, and Xueshi pays more attention to law and practicality."

"Both are the same."

"It's been cold lately, you haven't fully recovered yet, so you don't need to wait for me outside. If you catch a cold, the root cause of the disease may still be down, and it won't be cured in a while."

"Come in."

When Qin Luoheng entered the room, he put the burden he had brought back on the desk, and went directly to the back kitchen without resting.

After a day of class, he was also hungry.

Confucianism says that a gentleman stays away from the kitchen.

Taoism does not have this concept at all.

"Zhuangzi Health Preserving Master" said: "My life has a limit, but knowledge has no limit."If there is a limit, follow the limitless, it is almost over!Those who are already knowledgeable are almost done!There is no close name for goodness, and no close punishment for evil.Yuandu believes that the scriptures can protect one's life, live a whole life, support relatives, and last a lifetime. '

In the eyes of Taoism, people should conform to the laws of things and develop in accordance with the changes of nature.

When people are hungry, they have to eat.

What Confucianism calls far-off cooks is completely hypocritical.

Not seeing for the sake of not seeing.

In the Taoist view, everything is the same, there is no difference, and it doesn't really exist because you don't see it.

After entering the back kitchen, Qin Luoheng shook his head as he saw the sudden extra bundles of branches.

Bao Shu said nervously: "I have nothing to do today, so I went out to collect some firewood. I didn't go too far, just near the house. I just want to do something within my power to repay you."

talking and talking.

Bao Shu's voice is like a mosquito.

Qin Luoheng said:

"I don't need your answer."

"Do you know what I learned in the classroom today?"

"In Daqin, it is the duty of every Qin person to act bravely in the name of righteousness. It is my duty to save you. You don't need to apply Confucianism."

"This is Daqin!"

"And you and I are both from Qin!!!"

(End of this chapter)