Madam, protect me!

After getting the answer to the question, Song Ning'er hummed a song and walked away proudly.

Song Mu'er sat in the pavilion with her arms folded, her back facing Li Nuo, and her pouted mouth could hang an oil pot.

She was really angry. Song Ning'er didn't let her brother Li Nuo play sepak takraw. Instead, she played shuttlecock with him and gave him cookies. He clearly knew that she and Song Ning'er didn't have a good relationship, but he played with Song Ning'er behind her back. The little girl had a taste of betrayal at a young age.

In fact, although Li Nuo liked Mu'er more, he would not be so petty as to get angry with Song Ning'er because she didn't play ball for him last time. It was just a sermon topic, and Li Nuo didn't think it was anything.

But looking at the angry Song Mu'er, Li Nuo could only explain helplessly: "You two look exactly the same, so I thought she was you."

Mainly because Song Ning'er had been pretending that she was her sister just now, and Li Nuo didn't suspect it at all.

Who knew a six-year-old girl could be so sophisticated?

Song Muer finally turned around, glanced at Li Nuo, and asked softly: "Really?"

Li Nuo stretched out his palm and said, "I lied to you. I am a puppy."

For Song Mu'er, this was already a very serious oath. A smile appeared on her face again, and she ran to Li Nuo and said, "Okay, I don't blame you anymore, it's all Song Ning'er's fault..."

Li Nuo thought that the little girl was easy to coax, but Song Muer was seriously thinking about how to prevent Song Ning'er from pretending to be her from happening again.

After thinking for a while, her eyes lit up, she looked at Li Nuo and said, "Let's agree on a password. Only the two of us know the password. The one who can't guess the password is Song Ning'er..."

Faced with her proposal, Li Nuo could only agree.

After unanimous discussion between the two people, they finally decided on the secret code as "one, two, three, four, five, go up the mountain and kill the tiger." The only one who came up correctly was Song Mu'er, or Song Ning'er.

Not to mention, this is really a good way to distinguish twins.

Although it was said that it was just an explanation of the problem, it was the same whether it was different or not, but Li Nuo didn't want to be confused.

Song Muer came over and asked Li Nuo a question. Li Nuo glanced at it and saw that it was exactly the same question as Song Ning'er. He had already told it once before and said it again. Of course, he was familiar with it.

Song Jiaren looked at the questions on the paper and felt her head hurt again.

Those calculations awakened her painful memories from ten years ago.

She remembered that when she was learning arithmetic, the most difficult thing was to put chickens and rabbits in the same cage. What kind of hemp, wheat, bean, poultry, and millet? The topic only took a page. Now Xiao Is it necessary for children to learn arithmetic that is so difficult?

When he talked about it for the second time, because he had the foundation of the first time, Li Nuo could easily pick up the examples from the shallower to the deeper.

The two sisters are indeed twins. Not only do they look the same, but their understanding abilities are also similar. Song Muer can also understand things that Song Ning'er can understand. She calculated step by step and quickly got the answer.

Song Mu'er looked at the result she calculated, a little unbelievable, and murmured: "So this question is so simple..."

Even Song Jiaren's eyes showed a little surprise.

When Li Nuo was explaining to Mu'er just now, she was also listening. As she listened, she found that the mathematical problem that filled a page didn't seem to be that difficult. Not only did Mu'er understand it, she also understood it. Got it...

After realizing this, she actually felt a little angry.

If Li Nuo had taught her arithmetic instead of the old man when she was young, her arithmetic would not be so bad.

At this moment, Song Jiaren had an inexplicable idea in her mind.

If only I had met him earlier...

After finishing this topic, Li Nuo stood up and stretched his body.

The system of linear equations in five variables may sound bluffing, but actually solving it only involves some of the most basic calculation rules. With their current mathematical level, they can master it very well.

Of course, the main reason was because Li Nuo was there to guide him.

After drawing inferences from one example, Li Nuo asked Song Mu'er to recalculate yesterday's chicken and rabbit in the same cage problem using the method he taught her. She quickly calculated the answer, and it was obvious that she really understood it.

Song Muer was reviewing what she had just learned. Li Nuo walked back to the room and came out with a thick book in his hand.

The title of this book is "Sumu Jing", which covers all the arithmetic in Daxia.

All mathematical problems in Daxia and even today's world are included in this book.

This shows the level of mathematics in this era.

The mathematics of later generations, after modern times, began to develop crazily. On the basis of ancient arithmetic, new branches were continuously extended, including number theory, algebra, geometry, topology, mathematical analysis... Don't mention a book like this. Well, even a hundred or a thousand books cannot cover all mathematical knowledge.

In the "Suan Jing", there are nine more details, called "Nine Numbers", which are square fields, corn, decline points, Shao Guang, business merits, average losses, insufficient wins, equations, and Pythagorean. Each detail , studies a similar class of problems.

For example, the chapter "Square Field" specializes in the calculation of the area of ​​​​acres, and gives the area formulas of various polygons, circles, bows, etc., in addition to the common decomposition, reduction, addition, subtraction, multiplication and division of fractions, as well as the four arithmetic operations. Complete Law.

"Shang Gong" is about volume calculation, and provides various three-dimensional volume formulas, which can be used to calculate earthwork and labor when building city walls and digging ditches.

The chapter "Uniform Loss" solves in detail how to allocate taxes reasonably; to solve the problem of the burden of taxes and servitude, several other subcategories also have their own uses. In short, the arithmetic of this era has a strong purpose, and almost all correspond to address various problems in reality.

Yesterday's problem of chickens and rabbits in the same cage, and today's problem of grains, are "equation" problems in "Suan Jing".

However, this "equation" is not that equation. The equations of modern mathematics refer to equations containing unknown numbers. The "equations" in "Suan Jing" refer to the linear equations of modern mathematics.

Li Nuo looked at it for a while and probably had an idea.

The content of "Suan Jing" probably includes part of the mathematics of junior high schools and high schools in later generations. Most of the questions can be answered with high school knowledge. For a prospective college student who has just passed the college entrance examination, the mathematics level is undoubtedly higher than that of people in Daxia. Dimensionality reduction attacks, of course, are not necessarily applicable to college students...

Song Muer thoroughly understood the problem assigned by her husband. When she saw Li Nuo reading, she did not interrupt him. She ran to the yard and said to Song Jiaren: "Sister Jiaren, look at whether my kung fu has improved..."

Li Nuo was reading with gusto, and suddenly there were sounds in his ears.

He turned around and saw Song Muer practicing in the yard. Every time she waved her little fist, there was a sound of breaking wind. She hit the tree with a thick mouth, and the thick trunk shook violently. Li Nuo even felt that the ground beneath his feet was shaking.

Seeing this scene, Li Nuo was stunned.

Is this a six-year-old kid?

After working on it for a long time, the last time she said she wanted to protect herself was not just a casual comment...

She really has this strength!

Just as Li Nuo was shocked at how such a powerful power could be contained in her small body, the sound of footsteps came from the door of the small courtyard.

Two figures slowly walked into the small courtyard.

The one in the back with a smile on his face is Butler Wu.

Walking in front was an elegant middle-aged man.

The middle-aged man has a tall and straight body, about 1.8 meters tall. His face is sharp and angular, his facial features are clear, and he has three long beards on his chin. He walks neither hastily nor slowly. There is something indescribable about the whole person. temperament.

If I had to use one word to describe him.

That's handsome.

So damn handsome.

Li Nuo has been dealing with Chang'an County Magistrate Pei Zhe these days. Magistrate Pei is quite handsome, but his temperament is a bit wretched. His looks are inferior to this middle-aged man, and his temperament is instantly turned into a scumbag.

When I am in my thirties and almost forty years old, if I have this temperament, will I be able to charm countless young women to death?

Butler Wu, who usually yelled in front of the servants of the Li family, was respectfully following the middle-aged man. His identity was not difficult to guess.

It was obvious that this elegant, handsome, and extraordinary middle-aged man was the current Minister of Dali Temple, the owner of the Li Mansion, and the father of his current body.

It has been a few days since Li Nuo came to this world, and this was the first time I saw him.

Butler Wu trotted over and said with a smile: "Master, the master is back..."

In his previous life, when Li Nuo was very young, his parents died for some reason. He was raised by his grandmother. The word father was a bit far away for him. Now facing this stranger whom he met for the first time, those two I can't even say a single word.

The middle-aged man walked slowly to Li Nuo and asked softly: "Is the injury better?"

Li Nuo came back to his senses, lowered his head and said, "At the birthday party the day before yesterday, the old lady rewarded me with a birthday peach from a farmer... and she has recovered."

The middle-aged man asked again: "Can't you remember what happened before?"

Li Nuo nodded and said, "I can't remember at all."

The middle-aged man said: "It doesn't matter, just forget it if you can't remember it. If you need anything on weekdays, just tell Butler Wu..."

After just saying a few words to Li Nuo and patting him on the shoulder, the middle-aged man turned and left.

Li Nuo could tell that this high-ranking official didn't seem to be good at communicating with his son.

It just so happened that Li Nuo was not good at this either. This peaceful relationship between father and son made him feel more relaxed.

When the middle-aged man left, he nodded slightly to Song Jiaren who was standing in the yard.

Song Mu'er hid behind Song Jiaren, seemingly a little scared, holding her clothes tightly with both hands, leaving only her head exposed.

Li Nuo came over, rubbed Song Muer's head, and asked, "Are you afraid of him?"

When facing Song Yu and others, she dared to hold her chest high and stand up and say that she wanted to protect Li Nuo. She didn't expect that Song Mu'er, who was fearless, was also afraid of people.

Song Muer nodded and said, "They say that Uncle Li's methods are very powerful, and many, many people have died in his hands."

Li Nuo asked: "Who said that?"

Song Muer said: "Brother Yu and the others."

The Dali Temple is responsible for prison cases. In Daxia, the power of local government offices is limited. Those who are sentenced to imprisonment or above, including the death penalty, must be reviewed and signed by the Dali Temple Minister. It is not wrong to say that.

Li Nuo smiled and said, "He killed all bad people. Mu'er is a good person, so there is no need to be afraid of him."

"Of course he is a good person, Song Ning'er is the bad person..."

After hearing what Li Nuo said, Song Muer finally felt relieved and ran to the side again to ravage the poor tree.

Song Jiaren looked at Li Nuo with a strange look, which contained some inexplicable meaning. Li Nuo noticed her gaze, touched his face, and asked uncertainly: "Is there something dirty on my face?"

Song Jiaren shook her head: "No."

Li Nuo muttered in a low voice: "Why would you look at me without you..."

Song Jiaren looked over again.

Li Nuo walked towards Mu'er and said, "Just take a look. It won't cost you anything. It's no big deal..."

I'll update one chapter today during the day, and then two more around 11:00 to 12:00 pm. I'll try to make it to the reading time next week and see if I can get on the new book list. One more chapter still doesn't count as an extra chapter for the leader.