Kong Yingda is the prince and the prince, and Li Chengqian has not communicated with him for a long time, but this time he came to look for him, there must be something big.

Wei Zheng said at this time: "Since it is the prince and the prince who comes, the minister will retire first!" ”

Li Chengqian refused.

"Nope! You're here to stay, we still have something to do! ”

"Yes!"

Wei Zheng had no solution, so he had to respond to Li Chengqian.

At this time, Kong Yingda's laughter came from outside the door.

"How is His Royal Highness the Crown Prince doing?"

Li Chengqian greeted him and said:

"It's Confucius! Come on, come on, sit sit down! ”

"Then you're welcome!"

Kong Yingda sat down directly.

He saw Wei Zheng and said, "It turns out that Wei Zheng is also here, the old man is polite!" ”

"Master Confucius doesn't dare! It was Wei Zheng who was rude. ”

The two of them laughed for a while.

Someone brought them tea, which can be described as very thoughtful.

Wei Zheng also sat down, and Kong Yingda took a sip of tea.

Li Chengqian asked: "Master Confucius doesn't teach me five imperial brothers, why did you come here to find this king?" ”

Kong Yingda glanced at Wei Zheng and said with some embarrassment.

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

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

But Li Chengqian still attaches great importance to this teacher, and he also did his best for the five princes and solved a lot of troubles for himself: he saved himself worry and trouble.

So he asked, "Tell me what is the matter, and see if this king can help you!" ”

So if there is trouble, he will try to help it, and if it is a matter of life, it is simple. But if it's something else, you have to think about one or two ● It's this kind of talent, and generally 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 Confucius, Wei Zheng is his own person, it's okay!"

Li Chengqian said so, Kong Yingda had no choice but to nod, but he was still a little embarrassed, it might be a difficult question to ask.

In the end, he plucked up the courage and said: "Actually, Li Gang gave the old man a problem, the old man thought about it for a day, but he didn't figure it out, so he thought of His Royal Highness the Prince, and thought that His Royal Highness the Crown Prince would definitely find a way, so he came over!" ”

It turned out to be a bet between Li Gang and Kong Yingda, and now it's interesting.

There are even questions that Kong Yingda can't answer.

So Li Chengqian asked: "Say it and let this king listen, maybe this king can answer for Confucius!" ”

Kong Yingda saluted and said: "The question is as follows: the four brothers have a total of 45 yuan, if the eldest increases 2 yuan, the second decreases by 2 yuan, the third increases to 2 times the original, and the fourth brother decreases to half of the original, at this time, the four people have the same amount of money, how much money do the original four brothers have?" Even if the old man knows "Nine Chapters of Arithmetic", he can't solve it! After thinking about it for a long time, I still didn't have a solution, so I came over to ask His Royal Highness the Crown Prince, maybe you can answer for the minister. ”

The content of "Nine Chapters of Arithmetic" is very rich, the whole book adopts the form of a set of questions, and contains 246 application problems related to production and life practice, among which each question has a question (question), answer (answer), and technique (the steps to solve the problem, but there is no proof), some are one question and one technique, and some are multiple questions and one technique or one question and many techniques ♀, and some problems are respectively subordinate to Fangtian, corn, decay (pronunciation) and solution according to the nature and solution method respectively under Fangtian, corn, decay (pronunciation ui) points, Shaoguang, business merit, average loss, surplus deficiency, equation and Pythagorean.

When Kong Yingda's question came out, it could be seen that Wei Zheng was folding his hands and counting at this time, but his fingers were not enough, and he couldn't count them in a short time.

Seeing that Li Chengqian kept shaking his head, this Wei Zheng is really ...... It's speechless.

However, the mental arithmetic of the ancients is definitely not very good, they are all processed through ancient calculators and calculations, which is not to blame them.

Kong Yingda saw Li Chengqian shaking his head and thought that Li Chengqian couldn't solve it, so he sighed and said: "It seems that His Royal Highness the Crown Prince can't solve it, the old man should ask the others!" ”

"Wait, Master Confucius! This king knows that the answer is 8 for the eldest child, 12 for the second child, 5 for the third child, and 20 for the fourth child! ”

Ah, Kong Yingda suddenly realized.

He tried to gestile and exclaimed:

"Your Royal Highness the Crown Prince, did you calculate it? How did I not think of it? ”

This speed is really unprecedented, and there is no one to come.

Li Chengqian said proudly: "It's not simple! ”

So I wrote down an equation:

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

9x=90

x=10

Then four more numbers were written, which were 8, 2, 5, and 20.

This is a calculation problem in elementary school, and the ancients did not have a high level of mathematics, so how could they come up with meditation.

But Kong Yingda is a little unsure of this.

Hurriedly asked, "His Royal Highness the Prince, what is this?" How can the old man only understand the word 'two'! ”

Kong Yingda sees the equal sign as 'two', it's no wonder, they don't understand what this formula means at all, at present, it's ♀ too difficult for them! It's confusing for them.

Only then did Li Chengqian realize that Kong Yingda didn't know Arabic numerals. Looking at this thing is like reading Martian, where to know what.

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

It's embarrassing, they don't know how to explain it?

The two of them didn't, they looked at the words on it as if they were reading a book from heaven.

"It's Arabic numerals! There are still unknowns! And the formula to find the unknown! ”

Li Chengqian had no choice but to say so.

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

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

Then again, if he wants to carry out educational reform, this mathematics must be indispensable.

Mathematics is indispensable to build a scientific system.

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

Now that it's written, let's make it out.

At this time, Wei Zheng asked, "What is Arabia?" ”

"Why his figures? Unlike our one, two, three, four......? ”

A large number of questions could not be solved in front of them, and everything was waiting for Li Chengqian to answer.

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

It's really shooting himself in the foot, but according to his intelligence, it's really nothing.

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

Datang God-level Prince Latest Chapter 316 3 X=10 URL: