Cheng Wanwan is decorating her new home.
She had already bought a lot of sheets and quilt covers in the mall and put them in cages. Now she asked Wu Huiniang and Cao Yingying to take them out together and spread them in every room.
This is a linen material favored by many people in modern society. It feels similar to burlap, but is softer and more comfortable to sleep on.
The standard equipment for everyone's room in the house is a bed, a wardrobe, and a table. You can make whatever else you need by yourself.
Cheng Wanwan took some time to decorate her room. There was not a bed in her room, but an earthen kang, which took up most of the space. She spread a cotton quilt on the kang, then put on sheets, and lay down on it. She felt very comfortable. pole.
It's not that she's selfish, but that the children in her family are smarter than the other, and she doesn't dare to bring out things of unknown origin.
This is her room. Without her consent as an elder, no children will come in without permission, let alone lie on her bed.
She also bought herself a latex pillow and put it on a linen pillowcase. It didn't look good until she slept on it, but she realized how comfortable it was.
The walls of the room are made of adobe, and straw straw and yellow mud can be seen. When you pick it with your hands, the yellow mud will fall down, which really affects the vision.
Cheng Wanwan bought some thin, silky fabric from the mall and carefully dropped it from the roof, as if it were wallpaper.
Pink and white fabrics hang on the four walls, which improves the light in the room a lot.
She laid a tablecloth on the table in the room, bought a simple brown porcelain jar, and inserted a few small wild flowers at the door of the house into the porcelain jar, which enhanced the style of the entire room.
Cheng Wanwan sighed comfortably. After traveling to Dahe Village for so long, she finally had her own private space and could finally sleep comfortably.
In the future, their family's life will definitely get better and better.
She walked out of the room, closed the door, and took a casual glance. The other rooms were the same. Only Cao Yingying's room had a touch of color, and a bouquet of purple flowers was placed on the table.
Seeing Cheng Wanwan's eyes falling on the little flower, Cao Yingying said a little embarrassedly: "I think this flower is very beautiful, and it will look better in the room."
Cheng Wanwan laughed: "I also placed a bouquet of flowers in the room. We really thought of the same place."
She planned to buy some flower seeds with strong vitality in the mall and sprinkle them on the edge of the courtyard wall. By then, the edge of the courtyard wall would be covered with all kinds of flowers. In spring and summer, she would sit in the courtyard and drink tea. Everywhere you look, birds are singing and flowers are fragrant. This is how you enjoy life.
She did what she said and immediately walked to the yard.
As soon as he went out, he bumped into Zhao Ergou. This kid was holding a piece of paper in his hand and looked like he was thinking.
He supported Cheng Wanwan and asked, "Mom, is my eldest cousin here?"
"I'm studying." Cheng Wanwan said casually, "What are you doing with your cousin?"
Zhao Ergou walked in and walked to the door of Cheng Zhao's room. The door was ajar, and he saw Cheng Zhao writing with his head down.
When his eldest cousin was studying hard, he did not dare to come forward and disturb him, so he quietly withdrew.
Cheng Wanwan glanced at the thing he was holding. There were traditional Chinese numerals written on it. She frowned and asked, "What is this?"
"After the bead arithmetic class, my eldest cousin started to teach Sidan and I "Nine Chapters of Arithmetic". I really couldn't understand some of the questions, so I came to ask." Zhao Ergou folded the paper and said, "Wait until the class starts in the evening I’ll ask my eldest cousin again when the time comes.”
"etc!"
Cheng Wanwan took the paper from his hand.
The above is a math problem, which should be taken from "Nine Chapters of Arithmetic". This book is considered a masterpiece of ancient mathematics and has many problems that are relatively close to reality.
"There are seven large villages and two small villages in a county. One large village plus two small villages can accommodate 1,680 villagers, and two large villages plus one small village can accommodate 2,280 villagers. Question, what are the differences between large villages and small villages? How many villagers will be accommodated?”
Zhao Ergou was almost scratching his head: "This question is so difficult. I couldn't figure it out even if I thought about it yesterday."
He is now very proficient in abacus, but he doesn't know where to start with the abacus, and his mind is a mess.
While the two of them were talking here, Cheng Zhao walked out at some point and said, "This question is like this..."
He studied for a long time yesterday and found the direction to solve the problem, and the calculated result was correct.
He explained carefully: "Let's assume that all villagers live in the big village, then..."
Cheng Wanwan was listening to it. A very simple linear equation of one variable had to be made using assumptions. It was very confusing to listen to.
She saw the confusion on Zhao Ergou's face getting thicker and thicker, and his hair was all scratched bald.
She sighed, it seemed like she was the only one to do it.
"Zhao'er, I think there may be a simpler way." She said, "Let's change the hypothesis and assume that a small village can accommodate A villager..."
Zhao Ergou shamelessly asked: "What does A mean?"
"This represents a number that we don't know yet. A small village is one-level, so one thousand six hundred and eighty minus two-level is the number of people that a large village can accommodate." Cheng Wanwan spoke very slowly to make it easier for the two of them to understand. "According to the hypothesis, two thousand six hundred and eighty minus two armor, plus one armor, equals two thousand two hundred and eighty. Let's calculate how much armor is."
She reached out and took the brush.
This is the problem in ancient times. They are not Arabic numerals but traditional Chinese characters. It takes half a day to write a number. It is difficult to form an intuitive number when seeing such numbers in capital letters. You have to convert them in your mind to 2 (1680-2 A) + A=2280, this is much more intuitive and the answer can be obtained instantly.
She smiled: "A is three hundred and sixty."
There were multiplication tables in ancient times. Zhao Ergou had already learned the simple multiplication table. He could calculate this clearly, but he did it very slowly.
He went through the process in his mind, his eyes widened, and he said in disbelief: "Mom, you are so smart, I actually understand it, I know how to forget it, it turns out to be so simple."
Cheng Zhao also looked incredulous: "Second aunt, how did you come up with this method?"
The gentleman from Nanfu Academy has not talked about this topic, but he has read some related books, which all use the hypothesis method, or use arithmetic chips to arrange and count. No matter which method is used, it is very slow and requires at least a cup of tea. It takes a lot of effort, but with Ergu's method, as long as you understand the principle, when you encounter similar questions in the future, you can say that you can write the answer in an instant.
Cheng Wanwan coughed and said, "In our family's business, we have to calculate our income and output every day, and gradually we have our own method."
"Hey, what are you talking about? You shouted for a long time and ignored me." Shen Zheng came over, "No, why are you talking about arithmetic? I get a headache when I see it, I'm leaving!"
He ran away.
Cheng Zhao grabbed him by the collar and said, "Brother Shen, come here and I'll tell you a way to solve arithmetic."
Shen Zheng was about to cry but had no tears: "The imperial examination does not test this, so I don't want to study."
"The imperial examination just doesn't pay attention to arithmetic. It's not that it doesn't take the test. The last question in the test paper every year is arithmetic." Cheng Zhao dragged him into the room, "Sit down and listen carefully to what I'm telling you. Ergou, come in too." Let’s sort it out again and record this way of solving the problem.”
Cheng Wanwan smiled and continued to work on his work.
Cao Yingying, who had been standing not far away, looked extremely complicated. On the first day she came to this home, she knew that this home was different from ordinary farmers.
But at this moment, she clearly understood that the biggest reason why this place was different from other villages was because of Aunt Zhao.
Aunt Zhao is literate, can do arithmetic, is very gentle, and seems to know everything. She does not look like an ordinary peasant woman at all, but looks like a lady who has attended school.
I always feel that Aunt Zhao is not a simple person.
