"That's right! That's the number! ”

Qin Jue nodded, and then said to Li Shimin, "Do you know the number? ”

"Of course I know this, and I've studied nine chapters of arithmetic."

As an emperor, Li Shimin has to learn a little bit of everything, and he has some involvement in nine chapters of arithmetic, so naturally there is no problem.

"Nine chapters of arithmetic."

Qin Jue nodded, and then said, "Yes, Lao Guan, you can be regarded as a beginner on the road of counting." ”

"Getting started?"

After Li Shimin heard Qin Jue's words, he was stupid.

These nine chapters of arithmetic can be said to be the most profound classic in the world about numbers.

This kid actually said that he was a beginner?

This is obviously a house, okay?

"That's right, the nine chapters of arithmetic are the most basic questions about mathematics, if you encounter something you don't understand in the future, you can come to my side to listen, I guarantee that you will have something."

Qin Jue smiled at Li Shimin, and then said: "Mathematics is the foundation of all physics, and I at Chang'an Institute of Technology must take mathematics as the most basic education, no matter what you study, you must learn mathematics well." ”

“……”

Li Shimin looked at Qin Jue's face, and just wanted to say, you are too good at blowing, right?

"You said that the nine chapters of arithmetic are the most basic, so I'll give you a problem."

Li Shimin looked at Qin Jue, who was pretending to be forced, and immediately wanted to give him a hard blow.

"You can go out as you please."

Qin Jue looked at Li Shimin and couldn't help laughing.

Needless to say, how basic the mathematics of this era is.

No matter how difficult the topic is, there is an upper limit, at most, he can come up with a primary school problem, and this kind of problem is naturally not a problem in Qin Jue's eyes.

"Today there is a pond square, and the center of it is born. One foot out of the water, lead the leaf to the shore, suitable for the shore. Ask the depth of the water and the length of the water. ”

Li Shimin directly used a question in nine chapters of arithmetic, but in fact, this topic is still a bit difficult for him.

Because when he did this problem before, he directly asked people to dig a pool, find a rope, pull it out from the middle of the pool, and then go to the edge of the pool, cut off the excess, and then came up with the answer.

He didn't believe that Qin Jue would be able to figure out this answer quickly.

When Qin Jue heard this question, after scribbling on the ground, he quickly said to Li Shimin: "The water is twelve feet deep, and the leaf is thirteen feet long. ”

“……”

Li Shimin looked at Qin Jue in surprise, and couldn't figure out how Qin Jue could get the answer so quickly.

The answer was exactly the same as his.

Then he saw the ghost talisman on Qin Jue's ground, and then asked, "You just drew the ghost talisman on the ground, and then you came up with the answer?" ”

"Ghost Drawing?"

Qin Jue's face was blank, and then he said to Li Shimin: "Lao Guan, it seems that although you have studied the nine chapters of arithmetic, you are not proficient in it, do you know why I wrote these things on the ground?" I just know that you don't understand the principle at all, and I want to explain it to you. ”

Qin Jue told a lie, and he didn't panic at all.

He wrote this formula, in fact, there is no way to do oral arithmetic, this is also no way, although these things know the formula, but the mental arithmetic ability is not strong, can only be written.

At this time, it is just the right time to pretend to be forced.

After Li Shimin listened to Qin Jue's words, he didn't know Qin Jue's thoughts, nodded his head, and then said, "You can explain it." ”

"Look at this picture, the pond is one zhang, and there is a water grass in the center, that is, this line is five feet."

Qin Jue pointed to one side of the right-angled triangle he had drawn, and then continued: "Next, this aquatic grass came out of the water one foot and was pulled to the river.

Let's assume that the length of the aquatic weed is an unknown, and then the depth of the water is the unknown minus one foot.

According to the principle of Pythagorean strands, four strings and five, the sum of squares of this Pythagorean is equal to the square of the strings.

In the end, it was calculated that the aquatic plants were thirteen feet long, and the depth of the water was 12 feet. ”

After listening, Li Shimin was directly stunned.

It's that simple?

it!

I spent so much manpower and material resources digging a pool to solve this problem, I thought I was very good, and solved a problem.

As a result, after listening to Qin Jue's analysis today, he was immediately dumbfounded.

"I understand the principle of hooking three strands, four strings and five, is this principle universal?"

Li Shimin was stunned and said a question.

Qin Jue slapped himself in the face, originally he thought that the other party was on the first floor and he was on the fifth floor, but he didn't expect the other party to be in the basement.

This Nima also dares to boast that he has mastered the nine chapters of arithmetic?

Pull a few handfuls of eggs!

"Pythagorean is called the Pythagorean theorem, you know? Theorem! ”

Qin Jue said to Li Shimin: "No matter how big this triangle is, as long as it is at right angles, then it must conform to the Pythagorean theorem!" ”

"I see!"

Li Shimin nodded suddenly in realization, and then said: "I didn't expect you to know so much about the nine chapters of arithmetic, since this is the case, then I can rest assured, you finally have a skill in this academy." ”

After Li Shimin finished speaking, he was still a little unsatisfied, and then continued: "But although you have passed my test, don't be complacent, in a few days, I will let Li Chunfeng come over and discuss the problems in the nine chapters of arithmetic with you, I hope it will help you." ”

“……”

When Qin Jue heard Li Shimin's words, he suddenly sweated wildly in his heart.

What made me pass your test, is your special test?

What kind of cowhide are you bragging about here?

I'm the one who is guiding you, okay?

What am I going to explore for Chapter 9 arithmetic?

Chapter 9 Arithmetic is the foundation!

"Lao Guan, don't let any crooked melons and cracked dates come to me, Li Chunfeng I know, isn't he just a bull-nosed old man, although his fortune-telling is a bit awesome, but this counts, I don't think he can do it."

Qin Jue directly shook his head at Li Shimin.

Li Chunfeng, Qin Jue still knows.

This guy's push back picture, that's awesome.

Although this push back picture was jointly painted by Li Chunfeng and Yuan Tiangang.

However, there were a total of 60 pictures of the back, and Li Chunfeng painted 57 pictures alone.

Yuan Tiangang is just making up the numbers, and it's Li Chunfeng who is awesome.

"Is he really good at fortune telling?"

After Li Shimin heard Qin Jue's words, a trace of essence flashed in his eyes.

"That's called a, do you know, his push back map, that's something that can be counted two thousand years after the Tang Dynasty."

Qin Yu said seriously.

"Push back picture? What is it? ”

Li Shimin looked at Qin Jue with a confused expression, and he didn't know what Qin Jue was talking about at all.

“……”

Qin Jue suddenly thought of something, this push back diagram seems to have been calculated by Li Shimin asked these two guys.

At this time, it seems that the push back picture has not yet come out.

"I'm also talking nonsense, a bull-nosed Taoist priest, what kind of fortune telling can I know."

Qin Jue said directly: "I have always believed that man will conquer the sky!" ”