Tang Dynasty Mingyue Song Dynasty Pass

Chapter 183 Talented Women Are Trouble

The talented girl Xu Qingwan asked questions in front of her, she kept asking questions, and Su Chen gradually felt dizzy.

As the saying goes: A woman who has no talent is a virtue. The ancients had opinions on women's reading. They believed that women read more, think more, and have more scheming. They are not easy to be manipulated by men. A woman reads a book.

Only wealthy and wealthy families will think about making the daughter of the family educated and reasonable, because marrying into a wealthy family with a certain culture and thinking, besides managing a big family, can live longer.

Because once entering the Hou family, the depths are like the sea, and the brainless women who do not study and have no culture are often short-sighted and open-minded, and they are easy to die prematurely among the rich.

But Su Chen's current thinking is that if Xu Qingwan didn't read so many books, he wouldn't be so troublesome to explain many problems to her at this time.

Just after finishing the poetry essay, Xu Qingwan picked up a piece of paper full of Arabic numerals and calculation formulas, and asked again studiously.

After looking at it curiously, Xu Qingwan couldn't understand the strange symbols and symbols on it. She had never seen them before, and asked, "What symbols are these? Are they useful?"

Su Chen nodded slightly and said: "These symbols represent numbers, such as the mathematical words we use every day one, two, three, etc., I used 1, 2, 3 instead, so the calculation is very simple, there is no need to accumulate Complicated calculations..."

Ever since, Su Chen explained to Xu Qingwan what he explained to Bai Susu.After a long time, the beautiful woman's red lips opened into an O shape, and she was a little stunned at this moment.

Su Chen wrote down the numbers of tens and hundreds on the paper. After careful explanation, Xu Qingwan's eyes became brighter and brighter, shining with the light of wisdom, and she kept nodding. With these numbers instead of traditional characters, the calculation is very simple , computing will naturally reduce suffering.

Through contact and communication, Su Chen discovered that Xu Qingwan was also very accomplished and interested in mathematics, so he made an exception to explain more to talented Xu, from binary, ternary, simple multiplication and division rules, and xy equations, to Complicated square root, cubic root, sine, and arcsine numbers, the mathematics knowledge from elementary school to junior high school, just passed in the morning.

After his mouth became dry, what surprised Su Chen was that Xu Cai's ability to accept seemed surprisingly high. In other words, she was a top female student!

"These calculation methods are too convenient and amazing."

Xu Qingwan sighed softly, as if she had discovered a new continent, her eyes were full of light, she was full of surprises, she seemed to have found another thing to study besides poetry, she would study "Mo Jing" and "Nine Chapters of Arithmetic" before, but this It is to pass the time, there is no such a systematic and novel calculation formula.

At this time, Su Chen thought that he could come up with some questions and let talented Xu do the calculations, so that she could calm down for a while.

"Miss Xu, for example, if I ask a few simple questions, you can do the calculations here, and you can use these formulas." Su Chen suggested.

When Xu Qingwan heard that the other party wanted to test her, she nodded her head and said with a smile: "I just started using it, and I still need to get used to it for a while to change my thinking. You can't intentionally create problems to embarrass others."

"It's not a difficult problem." Su Chen smiled, and then asked the question: "Chickens and rabbits have a total of 92 legs. If the chicken is replaced by a rabbit, and the rabbit is replaced by a chicken, the total number of legs is [-]. How about chickens and rabbits?" How many of each?"

Xu Qingwan was stunned. Hearing such a topic, she couldn't laugh or cry. In the past, she was always in pairs, writing poems and prose, which was very elegant, but now she was counting chickens and rabbits' feet.

In the past, such a calculation would have required some effort and thinking, but after having the xy formula, Xu Cainv drew inferences from one instance, used the equation and Arabic numerals, calculated on paper, and immediately came to a conclusion.

"There are fourteen chickens and eighteen rabbits, right?" Xu Qingwan looked at Su Chen and asked.

Su Chen nodded slightly, looking at her calculation formula on the manuscript paper, there was nothing wrong with it, and the answer she got was quite correct.

"Okay, let's listen to this question again. There is a group of chickens and rabbits. The total number of legs is [-] more than the total number of heads. How many rabbits are there?"

After Xu Qingwan finished listening, she immediately started to write and listed the equation on the white paper. After a while, she raised her head and said, "Nine rabbits!"

Su Chen praised: "Not bad, I didn't expect you to be so good at studying."

Xu Qingwan smiled lightly and said, "Thanks to this calculation formula and computational thinking!"

Su Chen came up with a question again: "Listen to one more thing, there are one hundred chickens and rabbits, and the chicken has eighty more feet than the rabbit..."

Xu Qingwan interrupted the question at this time and said: "Mr. Su, can we stop counting chickens and rabbits and change to another animal."

Su Chen smiled slightly, and said: "Okay, since that's the case, let's change a few animals to make it more difficult! Now, spiders have eight legs, dragonflies have six legs and two pairs of wings, Chan has six legs and a pair of wings, Now there are eighteen of these three kinds of animals, with 110 eight legs and twenty pairs of wings, how many of each kind of small animal are there?"

Xu Qingwan frowned slightly. She could tell that the problem was a little difficult this time. She began to patiently write formulas on the paper, and then calculate the number of animals. As long as she has mathematical thinking, the seemingly difficult problem actually has The easy-to-use formula for solving problems is not difficult to calculate in the end.

After a while, Xu Qingwan's eyes flashed, and she said, "There are five spiders, seven dragonflies, and six cicadas, right?"

Looking at Xu's talented girl's appearance and her diligent study, Su Chen already understood that elementary school arithmetic problems would not be difficult for her.

Even though Xu Qingwan was only solving these numbers and formulas on the first day, she learned very quickly and had a strong mathematical ability.If this was in his era, she must have been a talented woman from Peking University, and she was the kind who read undergraduate, master and doctor together.

"Okay, let's finish the calculations for today, you can get familiar with it when you go back!" Su Chen was worried that this girl's interest in mathematics would be aroused, and it would be too bad to come to him every day to ask him to do the questions, so it's better to let it go.

Xu Qingwan really didn't want to finish it, looked at him with a smile, and said: "I didn't expect you to understand so many wonderful ideas, which are simple and convenient, but also contain truth. I thought Mr. Su was only good at poetry, but he is also so proficient in arithmetic. In the future, you should ask Mr. Su for advice."

Hearing this, Su Chen groaned in his heart, being targeted by a school bully would be enough for him to have a headache in the future.

"Actually, poetry and arithmetic are all on paper, but my favorite is Gewu. Didn't you still doubt the usefulness of Gewu at the banquet yesterday? Let me take you to see if it can really benefit the people. " After Su Chen finished speaking, he took Xu Qingwan out of the study and sat on the wooden table and bamboo chair in the yard.

On the table, there were several equipments for filtering fine salt that he put aside. Su Chen brought some coarse salt, which are large salt blocks that ordinary people can buy in the market. It contains a lot of mineral impurities, and it will feel dry when eaten. The taste is sour and bitter, and long-term use will also cause certain damage to the human body.

Xu Qingwan asked curiously, "What are these for?"

Su Chen explained: "To make fine salt, iodine can also be added. In the future, eating the fine iodized salt I remember from Su can help the people reduce diseases and improve their physical fitness. The average age of the people in the Tang Kingdom is at least five years longer years of life!"

Xu Qingwan's eyes revealed astonishment, obviously she couldn't believe it, and asked suspiciously: "Does it really have this effect?"

"That's right, there's nothing impossible to do, only unexpected, just watch!" After saying that, Su Chen began to concentrate on making it, starting from the steps of dissolving, precipitating, filtering, and evaporating.

(End of this chapter)