God-level prince of the Tang Dynasty

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?"

"Of course!"

The next step is to promote, so there is no need to hide it.

So he began to teach the two ten Arabic numerals, and also explained the combination.

From the single digit to the unit of [-] million, to percentages, fractions and the like.

……

These and other issues, Li Chengqian can spend a lot of time talking about these things.

In the end, Kong Yingda and Wei Zheng felt amazing.

Kong Yingda said: "It turns out that Tianzhu's numbers are so exquisite!"

Li Chengqian also felt that these mathematics are really much easier to use than the current one, two, three, four.

Immediately afterwards, Li Chengqian began to explain to them the use of addition, subtraction, multiplication and division symbols, which amazed them even more.

I have to admit that Arabic numerals do have an absolute advantage in calculation.

Addition, subtraction, multiplication, and division can be calculated with just one formula, and there is no need for calculation chips, not to mention the convenience.

He also mentioned the concept of unknown numbers. Although the two were confused, they finally understood a little bit. After all, the problem-solving methods in "Nine Chapters of Arithmetic" are similar to Arabic numerals.

A group of three people directly reversed.

Kong Yingda is a teacher, now it seems that he is like a primary school student seeking knowledge, eager to learn, concentrate...

In the end, the two actually memorized the writing of the ten numbers, and even knew how to infer other cases from one instance.

At this point, Li Chengqian was amazed. Sure enough, none of the people who could become officials were ordinary people.

Of course, this has an inseparable connection with his teaching method.

You must know that he is talented, and all difficult problems, including teaching methods, are simple elementary school students' problems for him, so he is surprisingly handy in teaching.

Finally, Kong Yingda couldn't stop nodding and said: "His Royal Highness, I have learned something today. If I can spread these things to my Tang Dynasty, then the Tang Dynasty will prosper!"

Kong Yingda's idea is good, but who will push it is a problem.

Li Chengqian said directly: "Why don't Master Kong talk to His Majesty?"

Kong Yingda fully agreed: "Okay, okay! I will do this! At that time, I hope His Royal Highness can prepare some teaching materials for the old man? Teach with me?"

"That's natural! Let Datang prosper, it's what we, Datang people should do!"

To be honest, these numbers are not difficult, just adding, subtracting, multiplying and dividing, it doesn’t take many lessons, as long as you teach the first wave of people and let them teach geometric numbers, there will be more flowers.

No matter how advanced it is like university numbers, these people will definitely not be able to learn it.It is not available at the moment, and there may be a chance for them to learn in the future.

But with this foundation, it will be much easier to teach in the future.

Wei Zheng also said beside him: "In this way, Datang is really blessed!"

"Hahaha! Thank you, Master Kong, for your patience!"

Arabic numerals are actually not Li Chengqian's main work, but since he was found out this time, he promoted them by the way.

Anyway, this is still beneficial to Datang.

"Don't worry, the old man is here! Small things, small things!"

In this way, with Kong Yingda around, it's nothing to worry about.

But at this time, Kong Yingda said: "Damn it, then Li Gang dared to bully me, and made this difficult problem, making the old man look bad, wait for me to avenge him with Arabic numerals!"

This guy really doesn't accept his old age, what's wrong with an 80-year-old man!He just wanted to win his breath, literati, it's all like this.

"By the way, His Royal Highness, the old man wants to ask a question! Give Li Gang a test!"

Li Chengqian was speechless for a while, then well, let me give you a question.

So he said, "There were 12 lighted candles on the table, but three were blown out by the wind first, and then two were blown out by another gust of wind. How many candles are left on the table?"

When this question came up, Kong Yingda smiled.

"His Royal Highness, you won't have such a simple question, will you? It's seven roots, seven roots, right?"

"Think again!"

Li Chengqian laughed, this guy really doesn't know how to listen to questions.

"His Royal Highness, this topic is too simple, let's change it!"

"Master Kong, you got all the answers wrong, and you still say it's simple?"

Wei Zheng on the side was also puzzled.

"His Royal Highness, isn't it seven roots? The minister also calculated seven roots."

Both were wrong, and very wrong.

Li Chengqian smiled.

"Ahem... the candles are burnt out, will they still exist? Tell me, how many unburned ones are left?"

As soon as these words came out, the two were immediately ashamed.

This kind of question is too simple, but it is easy to make mistakes.

Wei Zheng reacted first, he said:
"High, high! His Royal Highness is indeed tall!"

And Kong Yingda said afterwards: "Hey, why didn't the old man expect that the remaining five will go out! Hahaha!"

This seems to be a question of mathematics, but it is not a question of mathematics. I accidentally fell into the trap. If I asked Li Gang this question, he would probably make a mistake for a while and be unable to answer it.

Then Kong Yingda laughed again: "This Li Gang, I don't think you will fail in the exam! Your Royal Highness, I will resign now!"

Kong Yingda's excited expression was that of a child.

"Go!"

With Kong Yingda's departure, it was almost evening.

Time always flies so fast that it is very inadvertent.

Then let's see how Kong Yingda talks about this with Li Shimin.

With his endorsement, Li Shimin will definitely come to beg him to let him promote Arabic numerals.

PS. Lao Fen came here again to ask for a monthly ticket and everyone to spread this book, spread it to more people, and get book coupons, so please everyone.

(End of this chapter)