Chapter 10: Surprise
"Tongtong, your dad and I will go home first!"
Teacher Jin had no worries about leaving the child at her parents' home. The child had grown up at her parents' home since she was young, and was as familiar with the child here as at home, and was even more doted on.
Tongtong has been studying very hard this month, so it's a good opportunity for her to relax at her grandfather's place.
Wu Tong waved goodbye to her parents. She was staying at her grandmother's house for two days and it would only take her half an hour to go home, so she had no reason to be reluctant to leave.
After sending Jin Yu and his wife away, Jin Yongning directed his son to take Wu Tong's information book upstairs, and then happily invited his granddaughter to eat watermelon. Holding a small watermelon of the same size in both hands, removing the top cover and using a small spoon, Wu Tong was treated like a spoiled child in the Jin family.
After eating the melon, my aunt took Wu Tong to try on the new clothes she bought for her.
Xu Meifeng has a keen eye for fashion and the clothes she buys are just right for Wu Tong's age. Goose yellow, willow green, and cherry blossom pink are all bright colors that represent youth.
In Wu Tong's future memories, she hasn't worn such delicate colors for many years. After work, white, gray, black and blue have become the main colors of her clothes. Reliving these colors of youth, Wu Tong smiled and realized that she is young now, what color can't she wear? She cherishes the time of youth.
Wu Tong held her aunt's arm and gave her a thumbs up of thanks and praise, which made Xu Meifeng hold Wu Tong in her arms and smile from ear to ear. It's still a pleasure to raise a little girl, she looks beautiful no matter how you dress her up!
Her little brat, when he was young, was passable, but now he is too rough to describe! Clothes are only for the changing seasons, and she buys a few sets of clothes from the same store. The styles are big and small, simple and convenient. There is no room for her to show off. She is not as fashionable as the child's father.
After accompanying his family for a while, Wu Tong sat down at the desk again. It was already four o'clock.
From Jin Xin's bookshelf, Wu Tong took out a book of must-do math exercises for high school students and only read the questions, covering up the answers that Jin Xin had done. Wu Tong then redid the exercises on a piece of draft paper. For some exercises that Jin Xin had not done, Wu Tong simply added the answers.
Can we say that they are worthy of being brother and sister? The reference books all have the same problem, most of them are sleeping.
"Hey..., Tongtong, are you serious?" Jin Xin came up to call Wu Tong to eat at her mother's command. As soon as she entered the room, she saw Wu Tong working on the questions again, without any pretense, and asked carefully, "Is this serious?"
He hurried back to have dinner as he had to go back to school for evening self-study.
The Jin family's meal times are now based on Jin Xin's schedule. Jin Xin comes home and starts eating, and the time is quite standard.
"Of course, when have I ever joked about this?"
···Therefore, quadrilateral EFGH is a parallelogram.
Wu Tong finished the geometric proof in his hand, raised his eyebrows and nodded seriously.
"My sister is better than my brother!" Jin Xin gave a thumbs up. He really felt Wu Tong's seriousness.
If Tongtong really wants to get in, I'm not kidding, he still has that energy.
It was only when he entered the third year of high school that he began to learn to control himself, concentrate and strive for the college entrance examination. There are more and more college students now, and he must at least get a college degree, so that he can show it off in the future, right?
Giving your sister support can also help you feel more confident.
"Here, brother, I support you with action!" Jin Xin took out the math textbooks from the fifth compulsory course in high school from the schoolbag in his hand.
At noon, he saw Wu Tong preparing for the second-year math class. No matter what the reason was, Tong Tong had already prepared for it, and as a brother, he had to help prepare everything. So after school, he immediately gathered all the math textbooks from the second year of high school into his schoolbag and brought them back to Wu Tong.
"Brother, you should also need it for review now?" Wu Tong didn't want to affect Jin Xin's review because of himself. Every moment of the third year of high school is precious.
Jin Xin smiled coolly and waved his hand, "Don't worry, little girl. We have just started the second round of review. We won't need these textbooks in the next few days. Even if we need them, Shitou and I can just share one!"
Tongtong’s new books will be distributed at the beginning of the school year, in three to five days at most, so what’s the point of delay?
"Use whatever you want, don't be polite to me!"
Wu Tong knew that Shi Tou was the boy's deskmate Zhao Lei, and also his childhood friend. The two of them were so close that they could wear the same pants.
"Okay, then lend me these textbooks for two days!" Wu Tong nodded. There was one required textbook and three elective textbooks. These were the last textbooks for the entire high school mathematics. If she worked hard, she would be able to return the books to the boy by the next morning at the latest.
···
Jin Xin thought that the two days Wu Tong mentioned was just a quantifier, referring to the few days before school started. He never expected that Wu Tong really spent less than two days to go through these textbooks in depth.
When Wu Tong returned the textbook to him early the next morning before morning reading at school, saying that he had finished learning everything, Jin Xin thought he was still sleepy.
Just read through them all?
"Tongtong, I'm really not in a hurry to use it!" Jin Xin scratched his head, his sleepy face still looking confused.
"I have really finished learning it. I have supplemented the notes for you, hoping that it can be helpful to you. If you have any questions, you can come to me for tutoring anytime!" Wu Tong smiled brightly, as if he was about to accidentally irritate the boy. How embarrassing!
"Brother, it's only courtesy to return the favor. These are the mock papers that you don't have yet. I think the questions are pretty good. Take them and practice with them. No need to thank me!" There are two copies, and she will finish her copy as soon as possible in the next two days. The tutor is not just talking nonsense, but is really capable of doing it.
In the past two days, she not only carefully mastered the knowledge points in the mathematics textbooks for the second and third years of high school, but she also spent a midnight to integrate the entire high school mathematics knowledge points and sorted out a knowledge tree for high school mathematics.
Sets belong to sets, functions belong to functions, sequences belong to sequences... the branches and trunks are distinct, and the logic is clear. The entire high school mathematics formula is in Wu Tong's mind, and he has a further sublimated experience.
Her math knowledge knife has been sharpened to an extremely sharp level. Starting today, she will tackle all high school math problems.
Jin Xin couldn't believe it and flipped through the textbooks in his hands quickly. In each of the four math books, there was one or two draft papers with densely written notes in each chapter. They were all analyses of the important knowledge points in each chapter and the derivation and analysis of the formulas.
He couldn't even imagine the scale of this project!
He casually glanced at the notes of the chapter on trigonometric geometry that he mastered best, and saw that in the neatly handwritten notes, the formula derivation and analysis were rigorous and correct, clear and detailed, and the teacher's explanation and analysis were no more than that!
Such verification results made Jin Xin even more shocked. At the same time, it also proved that the little girl was not lying at all and had really finished learning the four math books in her second and third year of high school!
Jin Xin was stunned. It had been sixteen years, and he was only now realizing that his sister was a super genius?
Learn and master the math of the second and third year of high school in two days? This is unbearable! !
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