The sixth princess followed Lin Xiaoyue's calculations, nodding while listening and watching.

"This formula is valid for all arithmetic sequence summations. You can make your own questions now, and then try it out." Lin Xiaoyue added.

The sixth princess glanced at Lin Xiaoyue and was suspicious.

Immediately, he really picked up the brush and began to measure.

After calculating several questions in a row, and finding that the situation was indeed consistent with what Lin Xiaoyue said, the sixth princess was shocked and admired.

After the sixth princess stopped writing, Lin Xiaoyue continued: "In addition to this formula, there is another formula for the sum of arithmetic progressions."

"What's the formula?" The sixth princess immediately became interested.

"In addition to the calculation method just now, the sum of the arithmetic sequence is also equal to the sum of the first term multiplied by the number of terms, plus the difference between the number of terms multiplied by the number of terms minus one multiplied by the tolerance divided by two."

"You can follow this formula now and do the math," Lin Xiaoyue reminded.

The sixth princess quickly followed suit.

After a while, the results were still the same.

This time, the eyes of the sixth princess looking at Lin Xiaoyue have turned into adoration.

Really a master of arithmetic! Master of masters!

No wonder Mr. Liang admired her so much.

Lin Xiaoyue felt somewhat useful.

"Looking at your purse, you probably only have one thousand taels left. I will also give you a question now. If you answer correctly, I will pay you back one thousand taels. If you make a mistake, we will discuss it this morning. That's it." Then, he said to the sixth princess.

It's a pity that this guy only brought more than 3,000 taels of silver to go out.

Otherwise, she is afraid that she will get rich today.

The sixth princess glanced at the purse in her hand and nodded.

As for the knowledge of arithmetic sequence that Mrs. Li told her just now, it took a lot of time for her to absorb and sort it out.

If she learns more today, she won't be too busy.

Too much greed is not enough to chew, anyway, Mrs. Li still has to live in the National Teacher's House for some time, she has more opportunities.

Oh yes, don't forget.

After returning, I have to send someone back to the Princess Mansion to get more silver taels.

Otherwise, if there is no luck, Mrs. Li may not be able to "study" with her again.

Thinking that she could learn arithmetic with Madam Li in the future, the sixth princess felt that she was bubbling with beauty.

And the maid who helped the sixth princess hold the money was also relieved at this time.

The only thing is that there is only more than a thousand taels left, otherwise, her princess will have to lose all the silver today.

That's why this maid still doesn't know her princess' plan at this time, otherwise she will be so angry that she vomits blood.

Lin Xiaoyue came to the table, picked up the pen and thought about it.

Only then did I start sketching and conceptualizing in my notebook.

The sixth princess has been exposed to multiplication and division, and has a certain foundation in arithmetic. She is really worried that she will not be able to take the test for ordinary questions.

At the beginning, Lin Xiaoyue originally thought to come up with a chicken and rabbit cage application problem of a binary linear equation.

But after thinking about it, I increased the difficulty and came up with an application problem of a ternary linear equation.

There is no arithmetic method of solving equations in this era. Within a quarter of an hour, the probability that the sixth princess can solve the answer is not high.

"I've figured out my topic." Suddenly, Lin Xiaoyue said.

The sixth princess immediately came up.

Lin Xiaoyue took her notebook away.

"I'll read it, you write it. After you've written the question, you can solve it. The time for writing the question doesn't count, and I'll give you an extra quarter of an hour after writing." Lin Xiaoyue said.

Her handwriting is really not very good-looking, so don't be ashamed.

As soon as the Sixth Princess heard it, writing the question by herself was equivalent to reading the question. The time to write the question is not included, it is more beneficial to yourself.

It should come down immediately.

"to make!"

Lin Xiaoyue then said: "There is a guy who went to the same grocery store for three consecutive days to buy things. Every time he bought three kinds of items, A, B and C. On the first day, he bought two items A and one item B. , and a small item, costing a total of seventeen pennies."

"The next day, I bought one item A, two items D and one item C, and spent a total of fourteen pennies."

"On the third day, I bought another item A, another item B, and two items D, which cost a total of 13 pennies."

Lin Xiaoyue controlled the speed of her speech so that the sixth princess could keep up with her narrative.

The sixth princess worked hard to write, but did not fall. But the more he wrote down, the more solemn his expression became.

I feel like I can't handle this problem myself.

"On the fourth day, this guy needs to report the bill, and then I remembered that I forgot what the price of each item was."

"Now, ask the princess to help this group calculate, what is the unit price of each of the three items, A, B, and C." Lin Xiaoyue said with a smile.

The sixth princess quickly recorded the last question.

Immediately, looking at the subject, he frowned.

Seeing this, Lin Xiaoyue raised the corner of her mouth.

"In order to make it easier for the princess to calculate the result, I set the unit prices of these three items relatively low, all within the number of ten. In a quarter of an hour, the princess still has the opportunity to calculate the result."

"If there is no problem with the princess, I will start the timer." Lin Xiaoyue said again.

The sixth princess frowned, "Let's start." But she still said.

Immediately, he picked up the brush and counted on the manuscript paper.

But Lin Xiaoyue didn't look at it, but went to sit down at the coffee table and let Zhao Shanshan make herself a cup of tea.

Then, he drank leisurely.

The whole process remained quiet and did not affect the Sixth Princess' performance.

Compared to Lin Xiaoyue's leisure, the Sixth Princess is different.

I saw that the sixth princess had a sullen face throughout the whole process, constantly writing on the manuscript paper, and constantly overturning her previous settings.

After a while, even the sweat on the forehead came out.

Finally, after a cup of tea, the sixth princess felt hopeless to solve the problem and gave up the meaning of giving up.

Not far away, Lin Xiaoyue saw that the sixth princess stopped writing and sat down on the chair in a dejected manner, with a smile on the corner of her mouth.

"This is the sixth princess, has the answer been solved?" Lin Xiaoyue asked with a smile, putting down the teacup in her hand.

The sixth princess sighed and finally got up.

"I give up." Immediately said to Lin Xiaoyue.

Lin Xiaoyue's eyes widened.

"There's still about half a cup of tea, so don't try it again?" asked with a smile.

The sixth princess smiled helplessly, and reached out to wipe the sweat from her forehead.

"If you don't try, keep going, and you won't be able to try."

Immediately, he took out his wallet.

He walked over and directly gave Lin Xiaoyue the entire purse.

"Sir, please tell me the answer directly. Apart from the 1,000 taels of silver, the rest is my reward for answering my questions," said the sixth princess.

This time, I actually called Lin Xiaoyue "Sir". This also represents the respect of the sixth princess to Lin Xiaoyue.

Yes, respect.

Such a master of arithmetic is naturally worthy of the title "Mr.".

Lin Xiaoyue weighed the weight of her purse and thought about it, but she opened the purse.

Immediately, he took out a thousand taels of silver notes from it, and returned the purse to the sixth princess.

Under the suspicious gaze of the sixth princess, she said: "This topic involves more arithmetic knowledge than the previous topic. To explain it to you, you must first explain other knowledge to pave the way. If you want to explain it clearly, it will be more troublesome."

"And I have been on the road for a few days, and I really don't have the heart to teach people at this time. So, you should keep the money yourself." Lin Xiaoyue smiled.

To talk about ternary linear equations, we have to start with equations.

After that, we will talk about equations, one element, two elements, and then three elements. It was indeed a bit laborious.

And in the purse of the sixth princess, after removing one thousand taels, the rest was only three or four hundred taels of silver.

For these three or four hundred taels of silver, it is not worth wasting your time.

Well, she's floating now, and the money is in front of her, and she doesn't want to earn it.

Mainly, she found that she seemed a little hungry now...

The sixth princess originally wanted to fight for one or two.

When she heard Lin Xiaoyue say that she had been rushing for several days in a row, she suddenly felt a sense of guilt.

It's really hard work, sir. I just arrived in Kyoto and was just making up for sleep, but she was woken up by her.

"No—it's fine, next time, Wan Ning will ask Mr. for advice." Thinking of this, the sixth princess said. He also gave Lin Xiaoyue a salute.

Lin Xiaoyue was slightly surprised, and nodded at the sixth princess.

Immediately, he walked over and said the answer.

"The unit price of item A is six yuan, the item B is three yuan, and the item C is two yuan. You can calculate it."

The sixth princess hurriedly wrote down the answer.

Then bring it into the question for calculation.

Finding that everything was right, the eyes of the sixth princess lit up.

"Mr. Talented! Wanning is convinced!" Immediately, she saluted Lin Xiaoyue again.

Lin Xiaoyue smiled.

"Princess is very polite."

"If there is nothing else—" Lin Xiaoyue issued an expulsion order.

Now he actually doesn't have any bad impression of these six princesses, but she is hungry and really doesn't have the heart to continue chatting with her.

Embarrassment flashed across the face of the sixth princess.

"No...it's all right...then, Wanning bids farewell..." After bowing to Lin Xiaoyue again, the Sixth Princess left with her.

When I left, I also took away the manuscript papers I recorded on the table by the way.

When the people went out, Zhao Shanshan couldn't help laughing.

"Miss, they, they..."

Lin Xiaoyue glared at Zhao Shanshan.

After all, the other party is the sixth princess, she doesn't give the other party face, after all, she is now a guest of the National Teacher's House, and the other party is bullying the door first.

But a maid, laughing at Her Royal Highness Princess passed away.

Zhao Shanshan immediately put away her smile.

At the same time, some vigilance was raised in my heart.

"The sixth princess has already come here, why didn't you wake me up?" Lin Xiaoyue asked.

In fact, she was woken up by the sixth princess. He just got up from the bed without opening his eyes.

The quality of sleep after that period was actually not good.

"I - oh, I wanted to tell the Sixth Princess the truth and called you. But Sixth Princess, she didn't give me that chance." Zhao Shanshan took Lin Xiaoyue's arm and said coquettishly.

She also felt that maybe she could handle the Sixth Princess. This way, you don't have to disturb the lady's rest.

Who knows, she still woke up the lady in the end.

Lin Xiaoyue glanced at Zhao Shanshan angrily.

"Forget it. Go to the kitchen and take a look. Bring some food. This lady is hungry." He said lightly.

Zhao Shanshan looked happy.

"Yes!" He responded quickly.

Immediately, out of the door.

Just after leaving the yard, Zhao Shanshan saw Li Xiao and Fan Teng.

As well as Steward Liu and others who were blocked by two people outside the yard.

Zhao Shanshan didn't ask much and went to the kitchen.

Only later did Lin Xiaoyue know that it was not long after the sixth princess arrived in the Meiyuan, butler Liu brought people there.

Even after that, Liang Chengcai also came.

But none of these people dared to enter the plum garden, they just watched from the outside.

It was only later discovered by Li Xiao and Fan Teng that they were blocked outside for questioning.

When Zhao Shanshan saw Butler Liu and others, Liang Chengcai had already left.

Where to ask? Naturally, she went after the sixth princess.

For, of course, the manuscript paper in the hands of the Sixth Princess.

In fact, not only the sixth princess, Liang Chengcai also wanted to learn more arithmetic knowledge from Lin Xiaoyue.

But with the instructions of the national teacher, and Li Xiao was in the plum garden, he didn't have the courage to approach Lin Xiaoyue.

Now that he saw the sixth princess "returning with a full load", he naturally had to go and see it.

Zhao Shanshan went to the kitchen. After asking, she realized that the kitchen had prepared a hearty meal for their young lady, and the portion was still large.

Zhao Shanshan was not polite. She couldn't take so much by herself, so she called two people from the kitchen to send the meal back to Meiyuan.

In the end, this meal was naturally not eaten by Lin Xiaoyue alone.

Li Xiao entered Lin Xiaoyue's room, and the couple ate the meal together.

In the afternoon, the sixth princess and Liang Chengcai were busy discussing the arithmetic knowledge on the manuscript paper taught by Lin Xiaoyue, as well as the algorithm and ideas for calculating the problem that Lin Xiaoyue posed. No one came to disturb Lin Xiaoyue.

Lin Xiaoyue was relatively leisurely, so she called Li Xiao and prepared to cook some delicious food to honor the national teacher.

When Master Guo Shi got the news, he naturally joined.

When I came to the plum garden, it was very novel to see Lin Xiaoyue with Li Xiao and the two servants busy.

After that, the national teacher was caught by Lin Xiaoyue and joined the busy ranks.

Wearing meat skewers, preparing seasonings, etc., it is fun and lively.

While doing things, Master National Teacher can also listen to his granddaughter and little maid and chat with him.

Hearing what happened in Meiyuan in the morning, Master National Teacher's face was full of smiles.

As expected of his granddaughter, her head is smart.

As soon as he made his move, he defeated the mighty Sixth Princess.

Hehe, he was wondering just now, why is it so lively here, and that kid Chengcai didn't come to join in the fun.

The feeling is to go to Jinxiu Pavilion to ask the sixth princess for advice.

Those two people have the same temperament...

After preparing for an afternoon, Lin Xiaoyue finally made a fire in the evening.

Lin Xiaoyue personally operated in front of the barbecue grill, and brought Li Xiao to kebabs for everyone.

With the combination of spices, the aroma of barbecue wafts out of the plum garden and spreads far and wide.

And the laughter in the plum garden also attracted the attention of the people under the National Teacher's House.

Butler Liu took a few servants and watched from a place not far from the plum garden.

When I heard the laughter from the plum garden, even including the laughter of the national teacher, I was shocked again.

What are you doing in this plum garden? It's also so fragrant.

And what kind of magic does Mrs. Li have? Not only did his son and the sixth princess convince him, but now he actually coaxed the national teacher into such a happy state.

That is the National Teacher. Since he entered the National Teacher's House, he has never seen the National Teacher laugh once.

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