A collection of arithmetic problems, this was the first time she had heard of such a thing.
Hearing Lin Wan's words, Yu Hua realized that he had left in a hurry and seemed to have forgotten to pack the real test paper and answers. As expected, Lin Wan should have known the test results.
You know it if you know it, it's not a big deal, but it seems that you can make a fuss about Lin Wan's status as the number one in the school.
Yu Hua smiled and explained: "No, my arithmetic scores were average before. During this time, it was thanks to this collection of arithmetic problems. If I use a strict term, it is called a collection of arithmetic problems. It was compiled by a person named Zhang San.
, which contains a wealth of arithmetic patterns and problem-solving ideas, which is very helpful. I bought ten books at the market next door today and plan to sell them to make a profit."
"Zhang San?!"
Lin Wan was stunned when she heard the name coming out of Yu Hua's mouth, and the name of the outlaw Zhang San flashed subconsciously in her mind.
Is this Zhang San the same person as the outlaw Zhang San who gave him a kind reminder that day?
"What's wrong?" Looking at Lin Wan's surprised and surprised expression, Yu Hua asked with concern in his eyes.
Lin Wan came back to her senses, shook her head, suppressed the emotions in her heart, and looked at the ten collections of wrong questions in Yu Hua's arms: "Nothing, Yu Hua, can you show me this collection of wrong questions in arithmetic?"
"Of course, you can take one yourself. My hands are not very convenient. I think this collection of arithmetic mistakes is quite good. It contains many rich problem-solving ideas and can be called an accurate arithmetic textbook."
Wang Po sells melons and boasts about herself. Although she will not admit that Zhang San is her sock, Yu Hua still does his best to praise the collection of arithmetic mistakes he compiled by himself.
"Accurate arithmetic textbook? Let me see if it is as good as you said." Upon hearing this, Lin Wan smiled, stepped forward, and reached out to pick up a brand new collection of wrong arithmetic questions.
The cover is simple and ordinary, with a rare sixteenth format format and five simplified Chinese characters written on the surface.
A collection of math mistakes.
Author: Zhang San.
Except for two basic pieces of information, there is no information about the printing bookstore. Although Huangchenggen Bookstore is famous for the printing industry in Beiping City, it cannot mark its own information on the books, including its name, location, etc.
If you mark your own information, congratulations, you will be able to receive the police station's one-week package soon.
Lin Wan took a look and immediately understood that the collection of arithmetic errors in her hand was produced by a pirated private printer and could not be traced back to its origin. She felt slightly disappointed and turned to the first page of the collection while asking Yu Hua.
: "Yu Hua, do you know the author Zhang San?"
"I don't know." Yu Hua shook his head and denied it. The reason why the collection of arithmetic errors was changed from Yu Hua's version to Zhang San's version was naturally to protect himself.
In the early stages of accumulating strength, the vest used to hide your true identity must not be exposed.
And it is not difficult to guess that Lin Wan, who secretly has another identity, seems to be looking for herself.
Yu Hua doesn't want to reveal his relationship with Ma Jia yet.
"Okay..." Lin Wan had no choice but to give up and did not continue to ask. She turned her attention to the first page of the collection of wrong arithmetic questions and read it carefully.
There are a total of five questions on the first page, which mainly involve problems of function types. Lin Wan can certainly solve these questions with her mathematical level, but the problem-solving ideas underlying these questions are very interesting and will make people think from different angles.
Understand the question type.
interesting.
Also very interesting.
After Lin Wan read the five function questions on the first page, her eyes lit up and she felt that she had learned a lot. She put aside the idea of looking for the outlaw Zhang San and moved her eyes to the second page.
It is still a function question. At first glance, the difficulty has increased a lot. Lin Wan carefully read the solution process of each question, and then focused on the solution ideas at the end. She felt that she had gained a lot.
My whole body became more and more focused, and I was quickly immersed in the knowledge world of Zhang's third edition of the arithmetic problem collection, unable to extricate myself.
Functions, trigonometric functions, algebra, analytic geometry, many knowledge points and question types that have not been covered by arithmetic teachers in literature classes are all covered in this third edition arithmetic wrong question set, and the detailed explanation of problem-solving ideas is even more wonderful.
Time passed unknowingly. At this time, Lin Wan, who was studying hard, suddenly felt someone poking her arm. She raised her head with a puzzled expression, and saw a helpless Yu Hua standing in front of her.
"Boss Lin Wan, it's almost half an hour. Let's go back to the classroom to read. There's no need to get winded here." Yu Hua shivered while holding a collection of wrong math questions, with a look of helplessness on his face.
This girl was worthy of being number one in the school. If nothing else, her academic talent was top-notch. She could read a book for more than twenty minutes despite the cold wind. If he hadn't reminded her, he felt that Lin Wan could have stood here for at least an hour.
"I'm sorry, this collection of wrong questions is so well written that I forgot the occasion for a moment. Yu Hua, how much does this collection of questions cost?" Lin Wan reacted, with a slight smile on her face, and folded her hands before finishing reading.
He asked Yu Hua about the third edition of Zhang's collection of wrong arithmetic questions.
A glimmer of light flashed across Yu Hua's eyes and he responded: "You want it?"
"Well, the writing is very good and can help me improve my arithmetic level. When Mr. Tao lectures, he does not explain in depth knowledge points such as functions and analytic geometry. My arithmetic level is not as good as Zhao Anyuan, nor as good as you." Lin Wan nodded.
, commented truthfully.
The literature class and the science class have the same three main courses, but they are different in the field of arithmetic.
Since the science class focuses on mechanics, the arithmetic exam is more difficult. The teacher will explain in depth the details of various types of arithmetic knowledge points.
In the literature class, since the arithmetic test is not very difficult, the content taught is much simpler than that in the science class.
This situation is beneficial to the literature class students, but it is not what Lin Wan wants.
Arithmetic is her weakness, and Lin Wan wants to make up for it.
"I'll give it to you if you want it. However, if any classmates ask about the problem set and would like to have a nice word from classmate Lin Wan, I hope it will make some small money, and I'm going to go outside the school to get some more." A smile appeared on Yu Hua's face.
.
"Sure enough, there is no free lunch in the world, okay, this question book is mine."
Hearing Yu Hua's words, Lin Wan couldn't laugh or cry. She still didn't understand what Yu Hua meant. She looked at the remaining arithmetic problem books in Yu Hua's arms and asked, "How much are the remaining nine books?"
"Why, you want these nine books too?" Yu Hua was a little surprised.
Lin Wan said directly: "Just tell me how much it will cost."
"One copy costs one, but I can only sell you eight copies. I want to keep one." Yu Hua looked at Lin Wan, thought about it, and carefully gave the price.
It's not a sale to anyone. It's a good thing to package it directly when you meet a big customer, but I don't know if Lin Wan can accept this price.
The price is one yuan per book, which is twice as expensive as the original idea of 50 cents per book.
It has to be said that after seeing the purchasing power of the students of Peking No. 4 Middle School, Yu Hua chose to increase the price.
If Lin Wan thinks it's too expensive...
Then don't sell it.
Anyway, the price of question books must go up.
When Lin Wan heard the price, she was even more satisfied: "It's quite cheap. Give me the book. I don't have any money with me. I'll give you the money when I go to the library in the evening."
Cheap……
The corner of Yu Hua's mouth twitched slightly. This kind of pirated book with no nature costs only fifty cents at most. One yuan for a book can definitely be called the price ceiling, but in the eyes of the big guys, it can only be a bargain.
Without wasting time, Yu Hua took out a collection of wrong questions on arithmetic and handed the other eight collections of wrong questions to Lin Wan.
After the transaction was completed, Lin Wan, who was in a happy mood, bid farewell to Yu Hua and left with the collection of wrong questions. The outlaw Zhang San was not found, but she found another work by Zhang San. This collection of wrong questions on arithmetic was very important to her.
The help in study is not small.
"I got off to a good start as soon as I arrived at school. I didn't expect that I would still have wealth. Not bad." Yu Hua looked at the big buyers who were gradually walking away. He was very satisfied. It could be seen from Lin Wan who bought nine title books at once. Because of this
There is a shortage of professional textbooks in the era, and the level and content of Chinese textbooks are not enough, so there is a considerable market prospect for a collection of arithmetic errors.
The most important thing is that students' demand for quasi-tutoring materials such as question sets is completely rigid.
Since it is a necessity, then there is no problem.
Holding the last book of incorrect questions, Yu Hua walked back up the stairs to the classroom on the third floor. When he arrived on the third floor, the classroom of Science Class 1 was empty, with no one else around.
Most of the other students went home and left school to relax. The poor kid Tan Qing, under his own arrangement, has not been back for two consecutive weeks. At this moment, he should be staying in the library and enjoying the baptism from the sea of questions tactics.
, Zhou Yuan went home to visit relatives today, and Fang Yu disappeared.
Without lingering, Yu Hua put the collection of wrong arithmetic problems into the drawer, turned around and left, heading to the dormitory.
Return to the dormitory.
"Squeak!" Gently pushing open the door, which was somewhat in disrepair, a harsh friction sound came out, and Yu Hua walked into the bedroom.
In the dormitory, Ji Han, Cao Wei and others were waiting for Yu Hua. The rich man Liu Tao was nowhere to be seen. He probably went home to visit relatives.
"Yu Hua, you're finally back." Seeing Yu Hua pushing open the door and entering, Ji Han, who had been waiting, stood up immediately, with a happy look on his face.
Cao Wei, who was reading, put down his book, winked at Yu Hua, and said jokingly: "We haven't seen anyone for most of the day, so we thought you were going to Bada Hutong to have fun and experience the gentle countryside."
"Tell me honestly, did you go to Bada Hutong today and leave my brothers and me in the dormitory to eat ashes?" Cheng Youping next to him agreed.