"I said, what are you arguing about?" Lin Xiaoyue put her hand on Zhao Shanshan's arm, making herself stand firm.

Displeased, he looked at the sixth princess opposite.

Facing the woman's face full of displeasure, as if she disturbed her beautiful dream, the sixth princess suddenly felt a little guilty.

"Miss, this is the sixth princess." Zhao Shanshan reminded Lin Xiaoyue in a low voice when she saw that her young lady looked like she was going to ask her teacher for guilt.

The sixth princess also heard Zhao Shanshan's words, and immediately straightened her back and raised her head.

Unexpectedly, after Lin Xiaoyue listened, she just glanced at her lightly.

"What about the sixth princess? This is the National Teacher's House."

"Mrs. Ben is now the guest of honor of Mr. National Teacher. Now this is Madam's residence, so anyone can trespass at will?" Lin Xiaoyue said solemnly.

What she disliked most was this "eldest miss" with big breasts and no brains, not to mention that this person disturbed her sleep.

What about the princess? You can still be aggressive outside, but this is the National Teacher's House.

Lin Xiaoyue was so imposing, forcing the sixth princess to bow her head. The raised back doesn't seem to be so straight anymore.

"I—this princess is not trespassing. This princess—" Sixth Princess explained subconsciously.

He looked at the math problem he wrote on the table.

"This princess is here to ask you for advice." Having said this, the sixth princess instantly resigned more strictly.

"Mr. Liang admires you so much. If you have real skills, you can solve this princess's problem!" After speaking, the sixth princess raised her head again and looked at Lin Xiaoyue.

Kind of like comparing me.

Lin Xiaoyue frowned.

"Do I have any real skills, what does it have to do with you?"

"You are not welcome here, hurry out." The exit said.

The most annoying thing is this big-chested, arrogant and willful eldest lady. She doesn't have time to mess around with her.

"You—" The sixth princess was extremely angry, and pointed at Lin Xiaoyue.

It's rude, it's so rude!

Seeing this, Lin Xiaoyue frowned even more.

He stepped forward directly, and took away the hand that the Sixth Princess pointed to himself with one hand.

"Want my wife to send you off in person?" said displeasedly.

At the same time, there was a gloomy look in his eyes.

The sixth princess was frightened and took a step back subconsciously.

"Princess!" At this moment, the two maids guarding outside heard the movement and ran in.

Seeing that her princess was being threatened, she ran over immediately.

"Presumptuous—" one of the maids shouted at Lin Xiaoyue, raised her hand and walked towards Lin Xiaoyue.

But before his hand fell, Lin Xiaoyue pinched it.

At the same time, Lin Xiaoyue kicked the maid and fell to the ground.

Under the terrified eyes of everyone, Lin Xiaoyue stepped on the back of the maid with one foot.

"It's really presumptuous. When the masters speak, do you have the role of a maid to intervene?"

After speaking, Lin Xiaoyue turned her head again and looked at the sixth princess provocatively.

"This person is rude to this lady. This lady gave a lesson on behalf of the sixth princess, what does the sixth princess think?" said arrogantly.

The sixth princess's heart trembled, and this time she was really stunned by the woman on the opposite side.

"Huh?" Before the Sixth Princess could answer, Lin Xiaoyue raised her voice. Looking at the sixth princess with some evil.

The sixth princess actually realized that her heart skipped a beat.

"I... really came to you to learn from..." Then, he explained again unexpectedly.

At this moment, she no longer dared to treat the woman opposite her as an ordinary woman.

Ordinary woman, how dare you not put her golden branches and jade leaves in her eyes? How dare you attack her people? How dare you intimidate her?

Such courage, such a disposition, should naturally be a true master and a great scholar!

This woman must be extraordinary!

Lin Xiaoyue was taken aback.

Hearing what the sixth princess said, and her attitude actually brought some grievances, she was embarrassed to be so aggressive.

Then, he took his foot off the maid's back.

When the sixth princess saw this, she breathed a sigh of relief.

"This lady doesn't have time to discuss. The princess still takes your people, let's go." Lin Xiaoyue said indifferently.

The two maids of the sixth princess looked terrified and wanted to leave with their master.

But the sixth princess looked at the table unwillingly and wrote the title herself.

"What do you want to promise to compete with this princess?" Then, he asked Lin Xiaoyue.

The more she feels that the person opposite has real skills, the more she wants to compare with her.

If she went back like this today, she would not be reconciled.

A look of irritability flashed on Lin Xiaoyue's face, just about to get angry again.

But suddenly he thought of something, and his eyes moved instantly.

"Okay." Immediately, he responded.

The sixth princess was startled, and a look of surprise flashed in her eyes.

"One thousand taels per question."

"We take turns to answer the questions. Within a quarter of an hour, if the other party can give the correct answer, the person who asked the question will give the other one thousand taels of silver."

"On the contrary, if the correct answer cannot be given within a quarter of an hour, the answerer will give one thousand taels of silver." Lin Xiaoyue said.

If you have to learn from her, then let's shed some blood...

If there is a lucky head, she doesn't mind playing with her.

When the sixth princess heard Lin Xiaoyue's words, not only did she not feel unreasonable, but there was even war in her eyes.

Yes, there is no lottery, what's the point of them fighting each other?

One thousand taels of silver per question is not small.

She is now looking forward more and more to asking this Mrs. Li for advice.

"Okay!" So, Princess Six's eyes lit up and she responded.

The corners of Lin Xiaoyue's mouth also raised, and the look in the eyes of the Sixth Princess was finally more pleasing to the eye.

"If you ask the question, let this princess come first, just the one on the table. If you can answer the question, this princess will give you one thousand taels of silver." Soon, the sixth princess said.

Lin Xiaoyue glanced at the sixth princess.

"Okay!" replied with a smile.

Immediately, he walked to the table.

Then, I saw the title written on the paper.

After reading the title silently in her mind, Lin Xiaoyue was almost amused.

Didn't she give Liang Chengcai this topic before?

Although not exactly the same, the principle is the same.

As soon as Lin Xiaoyue walked to the table, the sixth princess stared at Lin Xiaoyue's expression, seeing that she didn't panic at all when she saw the title, but took out a pen and paper from her sleeve with a calm expression.

Then, the sixth princess quickly noticed that the paper and pen used by Lin Xiaoyue were completely different from those used by people nowadays.

The paper she used was bound into volumes. Neat lines were also drawn on it, dividing the paper into equal rows.

And her pen is even more amazing. It's not a brush, and you don't need to dip ink when writing.

The point is that, despite this, the handwriting is thin and clear, even clearer than a brush.

The sixth princess was very curious and moved forward.

Then, I saw Lin Xiaoyue draw a lot of symbols on the paper like ghosts, and then continued to write down.

Immediately, after a while, Lin Xiaoyue's expression brightened, and she suddenly stopped sketching.

"The answer is 250,000." He said.

While speaking, the pen also hooked up the final number calculated on the manuscript paper.

The sixth princess' pupils shrank, and she almost lost her footing.

Immediately, he looked at the "ghost drawing symbol" circled by Lin Xiaoyue on the manuscript paper, and his eyes were full of shock.

"You—how did you calculate?!" Then, he looked at Lin Xiaoyue in disbelief.

It's too fast. From seeing the title to starting the calculation on paper, it didn't take half a cup of tea before and after!

Lin Xiaoyue hooked her lips.

"Let's talk first, is my answer correct?" He looked at the sixth princess.

"Yes... that's right." Sixth Princess hurriedly said.

Lin Xiaoyue raised the corner of her lips again, and then she reached out to the sixth princess.

"Then bring it." He said.

The sixth princess was stunned.

Just wanted to ask "what?".

Then, suddenly thought of Caitou.

So he turned back and looked at one of his maids.

"Give this princess one thousand taels of silver notes." said to the maid.

The maid's complexion changed, and she glanced at Lin Xiaoyue, with a flash of fear in her eyes.

Immediately, reluctantly, he took out a thousand taels of silver notes and handed them to the sixth princess.

"Princess—" Just wanted to persuade the Sixth Princess to let her not be fooled by the woman opposite.

Unexpectedly, the sixth princess had already snatched the bank note without looking at her.

Immediately, he turned around and gave the bank note to Lin Xiaoyue.

"Come on, how did you calculate it?!" After paying the money, the sixth princess asked Lin Xiaoyue excitedly.

Lin Xiaoyue accepted the bank note with a smile, and then gave the bank note to Zhao Shanshan and asked her to put it away.

Then, he looked at the sixth princess.

"There's nothing difficult about this problem, it's just a summation of arithmetic progressions."

The sixth princess was stunned.

"What? Arithmetic sequence? What is an arithmetic sequence?"

Lin Xiaoyue saw that the Sixth Princess was dumbfounded, and was amused with a "puchi".

"Forget it, you don't understand."

"I guess, at your level, to calculate this problem, you should add the first item and the last item. Then add the second item and the penultimate item."

"In this way, the formula is cut in half, and then the same addend is obtained. Then the multiplication is used, and the result is obtained after fast operation."

"Really?" Lin Xiaoyue looked at the sixth princess.

This is also an algorithm she taught Liang Chengcai before when she taught him multiplication.

At that time, she thought that there was no multiplication in this world. Later, when her business became bigger and she had more contact with the accountant, she realized that there is actually multiplication and division in this world.

It’s just that there are not so many people who know it, and even fewer people can really use the ninety-nine multiplication table with ease.

Yes, in this world, there are actually ninety-nine multiplication tables. It's just that the way of reciting is not as concise as it is in the 21st century.

The sixth princess listened to Lin Xiaoyue's explanation and found that although she did not understand some words, she could still guess what Lin Xiaoyue wanted to express.

"Yes, this is what this princess does." After listening, the sixth princess nodded.

"What do you mean, there is a more convenient algorithm for this question?" Immediately, he asked Lin Xiaoyue again.

Lin Xiaoyue smiled and nodded.

"Of course there is." He said.

The eyes of the sixth princess lit up.

"How?!" He asked quickly.

Because she was too excited, she even grabbed Lin Xiaoyue's arm.

The expression on Lin Xiaoyue's face quickly subsided, and then she looked down at the sixth princess and grabbed her hand.

The sixth princess smiled awkwardly, and then released Lin Xiaoyue.

"How to calculate, why did Mrs. Ben tell you?" Lin Xiaoyue continued.

The expression of the sixth princess changed.

Immediately thought of something, he quickly said, "I-I'll pay! One thousand taels of silver, I'll give you one thousand taels of silver, how about you tell me?" He looked at Lin Xiaoyue expectantly.

The two maids of the sixth princess and Zhao Shanshan next to Lin Xiaoyue were all taken aback.

What? Another thousand taels?

Their princess is too generous, isn't it? /Her lady is too good at making money, right?

Lin Xiaoyue's complexion softened again when she heard that the sixth princess would give one thousand taels.

"Bring it here." Immediately, he reached out to the sixth princess again.

The sixth princess looked overjoyed, turned her head back immediately, and reached out to her maid again.

The maid had a struggling look on her face.

"Princess—" Wanted to persuade.

"What are you doing? Hurry up and bring it!" Unexpectedly, before he could finish speaking, he was interrupted by his own princess.

After dawdling, I took out the purse, and just wanted to get the silver note from it.

Unexpectedly, the sixth princess quickly reached out and snatched her purse directly.

Then, everyone saw that the sixth princess took out all the silver notes in the purse.

After clicking, he took out the one with the largest denomination and handed it to Lin Xiaoyue.

Lin Xiaoyue glanced at the remaining silver notes in the princess's hand, with a look of pity on her face.

After taking the bank note, he immediately gave the bank note to Zhao Shanshan.

Zhao Shanshan looked happy, and hurriedly received the bank note and put it in her purse.

This happy little look is in stark contrast to the sixth princess maid who just took out her purse.

After receiving the money, Lin Xiaoyue didn't hide it any longer and walked to the table.

Putting the small book in his hand on the table, holding a signature pen in his hand, he began to explain to the sixth princess.

"The so-called arithmetic sequence is a sequence in which, starting from the second term, the difference between each term and its previous term is equal to the same constant. This constant is called the tolerance of the arithmetic sequence."

Seeing that the sixth princess didn't understand, Lin Xiaoyue explained again, "It's like this question you asked. Its second addend is three, and the third is five. You subtract the first from the second, and the third Three terms, minus the second term, or even the last term, minus the penultimate term, and you get the same number. It's all two."

Seeing the sixth princess nodding, Lin Xiaoyue continued: "Such a sequence is called an arithmetic sequence. And this two is the tolerance of this arithmetic sequence."

The sixth princess nodded again.

"In fact, there is a quick calculation formula for adding arithmetic progressions like this. After you bring the numbers in, you can get the result directly."

The eyes of the sixth princess lit up.

Lin Xiaoyue then left an extra line and began to write the formula for the sum of arithmetic progressions.

"That is, the sum of the arithmetic sequence is equal to the sum of the first and last terms, multiplied by the number of terms, and finally divided by two."

The sixth princess didn't quite understand it, but she could see the formula written by Lin Xiaoyue on the paper, but she understood it. (Because Lin Xiaoyue wrote arithmetic in order to take care of the sixth princess, using the writing style of this era.)

"For example, in this question, the first item is one, the last item is nine hundred and ninety-nine, and the sum is one thousand."

"After that, multiply one thousand by five hundred, and you get half a million."

"Dividing 500,000 by two gives the final number of 250,000."

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