Originally, Liu Shan was very optimistic about Xue Rengui, a young man, who was not only tall, but also had the strength of his arms and eyes.

It's the sister who brought this oil bottle and also suffers from eye disease.

At that time, Liu Shan was still worried that if Liu Ruyu got married, she would not have a good life, and she was not very happy.

But he couldn't stand his daughter Ruyu liking it, and Liu Shan didn't stop him.

But now, Xue Rengui has met a noble person all of a sudden, and in the blink of an eye, he is actually a five-grade official, this is a big official at the level of the county master!

At this time, Liu Shan had a sense of crisis in his heart.

No, we have to get them married as soon as possible!

Otherwise, maybe the girl from which family will take the lead!

Therefore, thinking of this, Liu Shan couldn't help but look at Xue Rengui and asked, "Rengui, you and Ruyu are not too young, when will the marriage between the two of you be done?" ”

Xue Rengui scratched his head and said, "Uncle Liu, my parents went early, and I will listen to you about family affairs." That's it, it's ......"

Hearing Xue Rengui's first half of the sentence, Liu Shan was still quite satisfied, this young man was good, and he really didn't see the wrong person.

But when he heard the second half of the sentence, Liu Shan couldn't help but be anxious.

"What's that? Don't ramble, what's going on, say it! ”

Liu Ruyu also looked at Xue Rengui nervously, and her heart rose to her throat.

Xue Rengui couldn't help but say: "Uncle Liu, that's the case, I just came to the Liang Palace, and I haven't sent it yet, this, this." But don't worry, if it doesn't work, I'll borrow money from His Royal Highness King Liang first. ”

Liu Shan couldn't help laughing and said, "I thought something was wrong?" So you're worried about this? You can rest assured, as long as you live a good life, I can rest assured, as for the dowry or something, it's all a trivial matter. Wait for tomorrow, you will find a matchmaker to hire. When I go back, choose an auspicious day for the zodiac, and you can get ready to get married. ”

Xue Rengui couldn't help but smirk: "I listen to Uncle Liu." ”

Xue Xiaoxiao smiled and said, "Brother, it's really good!" By the way, my sister-in-law finally came once, so you can take your sister-in-law out for a good walk today! ”

Hearing this, Xue Rengui also nodded and called Liu Ruyu to go out together.

The two had just confirmed their relationship, and although Liu Ruyu was as sweet as honey in her heart, she was very embarrassed on her face.

When he went out, Xue Xiaoxiao quietly stuffed the money into Xue Rengui's hand.

This money was not given by Li Su, Li Su didn't think of it at all.

After Liu Zhi learned the news, he was afraid that Xue Xiaoxiao would need to spend money, so he hurriedly sent it over.

……

said that it was rare for Li Yu to come to class today, and the old man Kong Yingda was still sick.

The morning class was followed by an arithmetic lesson.

Wang Xiaotong, a teacher in the arithmetic class, once gave Li Shimin a letter of recital after learning Arabic numerals and arithmetic symbols last time, suggesting that these numbers and symbols be popularized nationwide.

However, this suggestion was not adopted, and in the end, it was not resolved, which made Wang Xiaotong very frustrated.

No way, the importance of mathematics in this era is too low.

However, Wang Xiaotong attaches great importance to these number symbols, and has begun to use them in his classroom to start teaching.

In the past few days, Li Su has not come to take sick leave, and Wang Xiaotong's preliminary teaching work has been completed.

After Li Su came, as soon as he came up, Wang Xiaotong began to ask questions.

As a result, the first person mentioned was Li Su.

"Li Su, let's calculate, what is three plus two minus five multiplied by zero?"

Li Su calculated a little, and immediately said: "It is equal to five." ”

As soon as Li Su spoke, Fang Yiai laughed and said: "Zero, equal to zero!" It's so stupid that you can't even figure out such a simple question. ”

"That's right, it's equal to zero, how can this question be wrong?"

"It's obviously equal to zero!"

Cheng Chuliang stiffened his neck and shouted: "It's obviously equal to five, will you count it?" ”

Qin Huailiang quietly pulled Cheng Chuliang's arm and said, "Don't shout, the answer to this question is equal to zero." ”

Cheng Chuliang said in disbelief: "How is it possible, how can His Highness miscalculate?" ”

In Cheng Chuliang's eyes, His Royal Highness is simply omniscient, and it is definitely impossible to make a mistake.

Qin Huailiang could only say helplessly: "Your Highness really miscalculated. ”

"Alright, Clear!"

Wang Xiaotong reprimanded, and the class fell silent.

"However, the answer to this question, Li Su did miscalculate, and the correct answer is zero."

What the?

Li Su said incredulously: "But the answer to this question is obviously five!" ”

Hearing Li Su's words, Wang Xiaotong couldn't help frowning.

Originally, after Li Su raised a difficult problem and proposed numbers and operation symbols, Wang Xiaotong was shocked by Li Su.

But today he miscalculated such a simple topic, and Wang Xiaotong was inevitably disappointed.

And now, after he made his mistake, he was still stubborn, which made Wang Xiaotong even more disappointed.

Wang Xiaotong couldn't help but say by name: "Fang Yiai, you get up and tell Li Su why this question is equal to zero." ”

Fang Yiai stood up and said proudly, "Yes, sir." Come, let me tell you why this question is equal to zero. Because three plus two equals five, five minus five equals zero, and zero multiplied by zero is still equal to zero, so the final result is zero. ”

Li Su looked at Fang Yiai like an idiot and said, "However, obviously multiply and divide first, and then add and subtract!" Five times zero equals zero, three plus two equals five, five minus zero equals five, and the final result is not clear that it is five? ”

Fang Yiai couldn't help blushing and asked thickly: "Who said that you calculate multiplication and division first, and then add and subtract?" It's from the front to the back! ”

Damn, you're cheating!

As a result, even Wang Xiaotong asked: "Yes, Li Su, why do you calculate multiplication and division first and then add and subtract?" ”

What's so good about this?

Isn't that what the priority of the operator looks like?

However, all of a sudden, Li Su immediately reacted.

This is the Tang Dynasty, the operator symbol has just come out, and it is even more impossible for them to know the priority of the operation symbol.

The question is, why take precedence?

Is it like a certain advertisement says, multiplication and division is a woman, I am a woman, I am a priority?

When I was in school, the teacher taught me like this, and I knew that I would multiply and divide first and then add and subtract, but as for why this happened, I really didn't study it deeply.

was asked like this, Li Su was really asked.

Fortunately, Li Su pondered for a while and figured out the truth.

Li Su couldn't help asking: "Sir, may I ask, I move three bags of rice at a time, Fang Yiai and Li Tai carry two bags of rice at a time, how many bags of rice do we move at a time?" How do you do this? ”