Mi Zhirong looked at Zhao Yuanxuan curiously, she always felt that something was wrong, thinking about it carefully, this strange little white-faced boy was not right in tone and tone of voice to herself, a little familiar, obviously unfamiliar. It is the well water that does not interfere with the river water, does this still need to be discussed?

Ji Ning smiled beside him, Zhao Yuanxuan obviously felt that she was a woman like Mi Zhirong, and there was a common language between girls, so she didn't have so many scruples when she spoke, and even Zhao Yuanxuan violated Mi Zhirong's social distance, which made Mi Zhirong very wary of her.

"Since she wants to see it, Miss Mi, just show her." Ji Ning said.

"Hmm." Although Mi Zhirong nodded, she didn't have a good impression of this strange boy at all, she didn't hand over the textbook of the general education class, but put it on the table and let Zhao Yuanxuan take it herself, but she took the math book in Zhao Yuanxuan's hand and held it in her hand to read.

Mi Zhirong looked at it for a while, and said to Ji Ning: "Ji Gongzi, this is the Arabic numeral you mentioned before?" ”

"Yes." When Ji Ning demonstrated some special mathematical algorithms to Mi Zhirong before, he had roughly mentioned what each number corresponded to, and explained it in detail with Mi Zhirong, so that she could write it down, and Ji Ning also listed the calculus and calculation formulas of addition, subtraction, multiplication and division of Arabic numerals on it, Mi Zhirong carefully calculated, and sure enough, he found that it was easy to understand and very helpful for students to learn algorithms.

There are no arithmetic symbols in ancient China, whether it is calculus or recording, it is all in Chinese characters, even addition, subtraction, multiplication and division are also in Chinese characters, which makes the recording of mathematics particularly inconvenient, and also makes mathematics want to develop to a higher level, there are certain shackles, simplifying the record and calculus, in fact, it is imperative, but no one thought of it before, even if it was thought of because the essence of Chinese civilization lies in the Four Books and Five Classics, no one wants to be a pioneer, and Ji Ning has become a pioneer today, and he is ready to carry out this new mathematical symbol in Sanwei Academy first, Let the Chinese civilization gradually integrate with the world civilization.

Ji Ning rewrote some mathematical rules with the same Arabic numerals, so that Mi Zhirong can feel the mystery of mathematics more intuitively, Mi Zhirong is wise, she just memorizes the meaning of a few symbols, she can draw inferences from one another, from some traditional Chinese algorithms, to study Ji Ning's new algorithms.

Mi Zhirong calculated a few topics, mainly in the multiplication of hundreds of digits, originally hundreds of dozens, multiplied by hundreds of dozens, using ancient Chinese characters to record and calculate, it is very troublesome, even with an abacus is not an easy thing, but with Ji Ning's method, but after a while, the numbers were calculated. Mi Zhirong then used the abacus to calculate, and in the end the numbers were accurate, and she began to believe that this algorithm was indeed meaningful for the development of arithmetic.

"It's really magical, just by converting words into small symbols, you can calculate so quickly and accurately." Mi Zhirong's face showed a look of joy, and she completely forgot that there was an eyeless Zhao Yuanxuan next to her, "Ji Gongzi, what are these?" ”

Ji Ning looked at Mi Zhirong's slender jade in the past, and then smiled: "This is the symbol of unknowns, in the algorithm of mathematics, the deeper algorithm is to set the unknown, and then deduce, this is more simple than the original nine-chapter arithmetic algorithm, don't believe it, Miss Mi can try the problem again." ”

Mi Zhirong thought about it, and couldn't think of a suitable topic for a while, Zhao Yuanxuan next to her would have already shifted her attention from the geography, history, and humanities textbooks in her hand to the booklet that she had just abandoned and exchanged, and she said, "I'll come up with the question." ”

Mi Zhirong turned a deaf ear, she deliberately ignored Zhao Yuanxuan's words, and came up with a problem by herself, which is also a simple question of assuming unknowns, she is not looking at who calculates faster, she just wants to see how Ji Ning uses this method of assuming unknowns to calculate, and whether it is easier than the algorithm of the nine chapters of arithmetic.

When Ji Ning took "x" and "y" as assumptions, listed the questions, and then replaced the left and right, and finally calculated the answers, Mi Zhirong was completely engrossed.

Ji Ning just used a few very simple small symbols to calculate and calculate the topics that took a lot of space to calculate and scrutinize in the nine chapters of arithmetic, which shocked her very strongly, and she also believed that Ji Ning's talent was not as simple as the Four Books and Five Classics.

Zhao Yuanxuan was also stunned and said, "You...... How can it be so accurate? I'll do the math......"

She began to pull her fingers, "There are forty rabbits and twenty-five chickens in the pen, which adds up to exactly two hundred and ten legs...... You're blind, aren't you? ”

Zhao Yuanxuan didn't believe that Ji Ning was calculating by himself, and he could quickly calculate so accurately from the number of legs.

Ji Ning smiled: "The calculation here is reasonable, how can you say that I am Hu Meng?" Can you try to calculate it yourself according to my algorithm? Or you can change it to another number and calculate it again for verification! ”

"Hmph, who wouldn't dare, you wait, I'll ...... the question again"

No matter how the question is solved, the algorithm that assumes the unknown is easier to calculate than the algorithm that uses the nine chapters of arithmetic, and in the end, even Zhao Yuanxuan himself was discouraged. Her little face was full of puzzlement, but finally she figured it out: "No wonder I couldn't test him before, it turns out that he has so many strange algorithms, I haven't learned it, how can I test him?" I originally thought that the nine chapters of arithmetic were the highest knowledge, but compared to him, it was nothing. ”

Mi Zhirong also admired Ji Ning deeply. Ji Ning said again: "What I said are all relatively ordinary algorithms, and the really advanced ones are also advanced mathematics...... It is advanced arithmetic, which involves more algorithms, and students cannot be involved for the time being, so they can only take their time. ”

Mi Zhirong smiled with satisfaction: "In fact, students can learn these things first, which has been of great help to their cognition and expand their thinking. ”

As she spoke, Mi Zhirong put together the math and prepared to take it back and study it carefully.

Mi Zhirong is a gentleman who does not stick to the law, which is the reason why she chose to teach at the Sanwei Academy opened by Ji Ning, and it is also the reason why Ji Ning hired her as a husband.

She very much hopes to learn knowledge from Ji Ning's mathematical arithmetic, and then spread this knowledge and carry it forward.

Now Zhao Yuanxuan quit again, although she got a good humanities textbook in her hand, but compared with the epoch-making mathematical scripture, what she held in her hand was a rotten book at all, which could be read as a children's book. She saw that Mi Zhirong was going to take away the math scriptures, and hurriedly said, "Hey, shall we change it back?" I suddenly felt that that book was very suitable for me, and this time we exchanged again, I will not regret it. If you agree, you can make any conditions, I have ...... Definitely for you! ”