Datang infinite pretense system

"Actually, the old man has something to ask for!"

At the same time, the expression on his face was a little awkward, and this was probably the first time he had seen him like this.

But for this teacher, Li Chengqian still valued it very much. He also did his best for the five princes and solved a lot of troubles for himself.Give yourself peace of mind and trouble.

So he asked: "What's the matter, tell me, and see if I can help you!"

So if there is trouble, he will try his best to help.If it's a matter of life, it's simple.But if it's something else, you have to think about it.Talented people like this usually don't come to Li Chengqian because of life, so most of them encounter academic problems.

Kong Yingda glanced at Wei Zheng again, Wei Zheng understood, and said: "If there is nothing else, the minister will avoid it?"

"No need, Master Kong, Wei Zheng is one of our own, it's okay!"

After Li Chengqian said that, Kong Yingda could only nod his head, but he was still a little embarrassed, it might be a difficult question to ask.

Finally, he mustered up his courage and said: "Actually, Li Gang posed a problem for the old man. The old man thought about it for a day, but he couldn't figure it out. Then he thought of His Royal Highness, and thought that His Highness must have a solution, so he came here!"

It turned out to be a bet between Li Gang and Kong Yingda, and now it's interesting.The two old men were really idle.

There were still questions that Kong Yingda couldn't answer.

So Li Chengqian asked: "Say it out and let me listen, maybe I can answer Master Confucius!"

Kong Yingda then saluted and said: "The question is as follows: the four brothers have a total of 45 Wen, if the eldest adds 2 Wen, the second reduces 2 Wen, the third doubles the original amount, and the fourth reduces to half of the original amount." One, the four of them have the same amount of money at this time, so how much money do the four brothers each have? Even if the old man knows "Nine Chapters of Arithmetic", he still can't solve it! After thinking for a long time, he still has no solution, so he came to ask His Royal Highness , maybe you can answer it for me."

The content of "Nine Chapters on Arithmetic" is very rich. The whole book adopts the form of problem sets and contains 246 practical problems related to production and life. The steps of the question, but there is no proof), some are one question and one technique, some are multiple questions and one technique or one question and multiple techniques.According to the nature and solution method, these problems belong to Fangtian, Millet, Shuai (cui) Fen, Shaoguang, Shanggong, Junshu, Yingshou, Equation and Pythagorean.

When Kong Yingda's question came up, Wei Zheng could be seen counting with his fingers, but he couldn't count in a short time because his fingers were not enough.

Seeing Li Chengqian shaking his head all the time, this Wei Zheng is really... speechless.

However, the mental arithmetic of the ancients was definitely not very good. They all used ancient calculators and chips to deal with it. It is not their fault.

Seeing Li Chengqian shaking his head, Kong Yingda thought that Li Chengqian couldn't figure it out, so he sighed and said: "It seems that His Royal Highness can't solve it either, I'd better ask someone else!"

"Wait, Master Kong! This king knows, the answer is 8 Wen for the eldest, 12 Wen for the second, 5 Wen for the third, and 20 Wen for the fourth!"

Ah, Kong Yingda suddenly realized.

He tried to gesture and exclaimed:

"His Royal Highness, how did you figure it out? Why didn't I think of it?"

This speed is really unprecedented and unprecedented.

Li Chengqian said proudly: "It's not easy!"

So I wrote down an equation:

x-2+x+2+x2+2x=45

9x = 90

x = 10

Then I wrote down four more numbers, namely 8, 2, 5, and 20.

This is a calculation problem in elementary school. The mathematics level of the ancients was not high. How could it be possible to figure it out with meditation.

But seeing it like this, Kong Yingda was a little at a loss.

Quickly asked: "His Royal Highness, what is this? Why does this old man only understand the word 'two'!"

Kong Yingda saw the equal sign as 'two', it's no wonder they don't understand what this formula means, at present, it's too difficult for them.This is too difficult!Let them know what to do.

It was only then that Li Chengqian realized that Kong Yingda didn't understand Arabic numerals.Watching this thing is like reading Martian texts, how can I know what it is.

Wei Zheng on one side is even more so!Even if he is knowledgeable, he still can't solve this problem.

This is embarrassing, they don't know how to explain?

The two were at a loss, looking at the words on it as if they were reading a bible.

"This is Arabic numerals! There are still unknowns! And the formula to find unknowns!"

Li Chengqian had no choice but to say so.

What are Arabic numerals, what are unknowns, and what are formulas, what exactly is His Royal Highness talking about.

Originally a very simple question, Li Chengqian solved it, but he raised a difficult problem for himself, how to explain the Arabic numerals, how to explain the relationship inside?Because this may involve addition, subtraction, multiplication and division, it is not something that can be done in a few words.

Having said that, he wants to carry out educational reforms, and mathematics must be indispensable.

To establish a scientific system, mathematics is even more essential.

Arabic numerals are of great significance to life, industry, agriculture and other aspects, so there is no need to hide them at all.

Now that it is written, let it be published.

At this time Wei Zheng asked: "What is Arabia?"

"Why his numbers? Not like our one two three four...?"

A lot of questions can't be solved in front of them, and everything is waiting for Li Chengqian to answer.

And Li Chengqian is now thinking about how to answer is the best.

It's really lifting a rock to shoot himself in the foot, but according to his ingenuity, it's really nothing.

Isn't it just teaching them to acquire Arabic numerals and formulas?Simple!

Chapter 317 Proposing a Question (Fourth Change)

Speaking of Arabia, Li Chengqian remembered it.

Arabic numerals are composed of 0 counting symbols 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10. Arabic numerals were first invented by ancient Indians, and then spread to Europe by Arabs, and then passed through Europe People modernized it and people thought it was an Arabic invention, so people called it "Arabic Numerals".

At that time, ancient India was called Tianzhu, so Li Chengqian said: "This number was invented by Tianzhu. The king accidentally found it in a book called Arabia. He thought it was novel, so he wrote it down. I didn't expect the algorithm to be very useful. So my king calls it Arabic mathematics!"

Kong Yingda didn't suspect anything, he said: "It turns out to be Tianzhu numbers. I remember that Tang Seng went to Tianzhu some time ago. When he returns, he will have a lot of harvest!"

Everyone is yearning for Tianzhu.After all, it is an unknown world, everyone said it was good.

But when they know that it is not very good in later generations, and let Huaxia crush them, they should feel proud.

But for Li Chengqian now, it doesn't matter.

Wei Zheng said at this time: "I wonder if His Royal Highness can explain the meaning of these numbers for us?"