On the fifth day, came the fifth course, arithmetic.

According to Yang Zhen, arithmetic is the basis of the formation.

Zhang Hong also read the textbook issued by the Ji family, and the arithmetic problems on it were all arithmetic problems learned by primary school students.

Zhang Hong couldn't help but wonder what to learn to learn arithmetic.

If it is really the arithmetic problem of these elementary school students, then Zhang Hong will definitely be able to pass this course steadily.

In class, all the children have arrived.

An old man with gray hair walked up to the high platform.

The old man's name is Ji Chen, a patriarch of the Ji family, and a bookkeeper of the Ji family.

In addition, it is said that this Ji Chen is still a person who knows how to refine the formation, which is extraordinary.

The many formations in the Ji family's manor, although they were not laid by Ji Chen, Ji Chen could easily control them.

Therefore, compared to other mentors, this Ji Chen still has a certain status in the Ji family manor.

Even Old Man Ji has to give three points to Ji Chen.

Ji Chen came to the stage and first introduced himself.

Then, Ji Chen shook his head and began to talk about the course of arithmetic.

"Arithmetic is the basis of the formation. ”

"The way to set up the formation, the difference is a millimeter, and the loss is a thousand miles. ”

That is to say, the most important thing in the way of arranging the formation is accuracy, and arithmetic can make the formation more accurate. ”

"So, for the rest of the time, I'll teach you the art of arithmetic. ”

"If you can master the method of arithmetic, it shouldn't be a problem for you to become a formation mage in the future. ”

Ji Chen said slowly, with a sense of arrogance on his face.

Among the four major professions in the immortal cultivation world, the array refiner is a rarer and more intelligent profession than an alchemist, a refiner, and a beast master.

Although Ji Chen is not a formation refiner, he is very interested in formation, which is also the thing he is most proud of.

Old man Ji Chen's words, Zhang Hong just listened, only felt that this old man Ji Chen was not only arrogant, but also very verbose.

Hearing the words of this old man Ji Chen, Zhang Hong's ears were about to become calloused.

However, the children of the Quartet listened very carefully.

"Arithmetic is a very profound knowledge, in order to explain arithmetic more vividly, I will now give you a question, let you calculate first, to see if you have the talent of arithmetic. ”

The old man Ji Chen smiled proudly.

Ji Chen did this because he wanted to stimulate everyone's interest in this subject.

"Please listen to the question: There are a hundred deer entering the city today, and each family takes a deer, and it is not exhaustive, and three families take a deer together, just as it is. How many homes are there in the city?"

As soon as the old man's question came out, the children below also began to fold their fingers, wanting to calculate this problem.

When Zhang Hong heard this question, he couldn't help but smile at the corner of his mouth.

Zhang Hong's mind: Isn't this just a simple equation for primary school students to solve, it's nothing! The equation for solving this problem is: X+X/3=100, and the final answer should be 75.

Zhang Hong shook his head, stood up, and said, "Mentor, if you can solve this problem, can you be considered to have a talent for arithmetic?"

"Of course, this question is quite mysterious, if it can be solved quickly, of course it is a person with a talent for arithmetic!" the old man Ji Chen smiled at Zhang Hong and said.

"Isn't I, then, a man of arithmetic talent? Zhang Hong said with a smile.

The people in the audience were all meditating, and no one seemed to be able to figure out the answer.

"Boy, you mean to say you've figured it out. Ji Chen stroked his gray beard and looked at Zhang Hong with a frown.

"Of course, this is very simple, the answer is 75. Zhang Hong said.

As soon as Zhang Hong said this, all the pre-selected children also cast strange glances at Zhang Hong.

Everyone also substituted 75 into the question, and it was really 75.

"Who is this guy?"

"How fast is it?"

"That's amazing! ”

There was an uproar in the audience, and among them, there were many praises.

"The master gets Chen Zan, the charm value is +1, and the accumulated charm value is 6 points!"

"The owner is praised, charm +1, accumulated charm 7 points!"

"The owner is complimented, Charm +2, Charm 9 points!"

“........”

"The owner is complimented, charisma +1, cumulative charisma 47!"

Zhang Hong was stunned, and thought: No, just such a simple arithmetic problem can get so much praise and so many charm points, can't the people in the audience with this kind of simple arithmetic problem know?

"Yes, boy, it seems that you have some talent for arithmetic! Ji Chen stroked his white beard, nodded at Zhang Hong, and said.

Zhang Hong heard Ji Chen's words and was proud for a while.

At this time, the system also sent a message from itself.

Zhang Hong thought in his heart, if he could get more people's appreciation, wouldn't he be able to get more charm points.

Zhang Hong also started a small abacus by himself.

Zhang Hong smiled at the pre-selected children in the audience, and it was the mentor Ji Chen who smiled.

"Tutor Ji Chen, if arithmetic is as easy as this question, then I really have some talent. Zhang Hong said.

"Boy, what do you say, you said this question is easy. Mentor Ji Chen asked.

"Isn't it easy?" Zhang Hong shrugged his shoulders and thought to himself: It seems that people in this world do not have such a thing as solving equations, so their arithmetic ability is very poor.

"Boy, it's not a good thing to speak wildly, and since you said it easy, I'll ask you another question. Ji Chen said.

"Tutor, please ask questions!" Zhang Hong said.

Ji Chen stroked his beard and thought: Okay, you stinky boy, you actually said that arithmetic is simple, now, I will give you a difficult question.

"Then please listen to the question: one hundred steamed buns and one hundred monks, three big monks are more indisputable, three small monks are divided into one, and how many small monks are each?"

After Ji Chen finished speaking, he was proud for a while, and thought: This question is a lot more difficult, if you can solve it, I will really convince you.

Zhang Hong heard Ji Chen's question, and smiled secretly in his heart: It was a simple one-dimensional one-dimensional solution just now, but now the difficulty has increased, and he actually gave a two-dimensional one-time equation.

The general meaning of this question is: 100 monks eat 100 steamed buns, three for each big monk, one for three small monks, and ask how many people there are for each of the big monks and the small monks.

Zhang Hong is a mental arithmetic: the big and small monks can be set to X.Y, the two equations are X+Y=100, 3X+Y/3=100, and the final conclusion is that there are 25 big monks and 75 small monks.

"The tutor question is a little more difficult than the previous one, but it's nothing. Zhang Hong said.

"Boy, you don't talk nonsense here, you can solve this problem quickly, you are amazing. Ji Chen stroked his white beard, stared at Zhang Hong with both eyes, and said.

The answer is that there are 25 senior monks and 75 junior monks. Zhang Hong said.

Suddenly, there was an uproar in all directions.

"The answer is really 25 and 75!"

"This kid is too fast to solve the problem!"

"Is this kid a god operator?"

“.......”

Zhang Hong was not too surprised by everyone's surprise, but this time, there were more surprised people who praised themselves.

"The host is complimented, charisma +1, cumulative charisma 48 points. ”

"The host is complimented, charisma +1, cumulative charisma 49 points. ”

"The host is complimented, with +2 charisma and 51 charisma accumulation. ”

“........”

"The host is complimented, charisma +1, cumulative charisma 104 points. ”

Zhang Hong found that after this answer, his charm value soared a lot.

This time, the charisma value soared by 57 points.

Zhang Hong's total charm value also reached 104 points.

For Zhang Hong, the more charisma, the better.

The more charisma points he has, the more he can improve his cultivation, purchase martial arts, and even unlock secondary jobs.

Zhang Hongxin: Now, my charm value has also reached 104 points, and I can spend at least 60 charm points to buy one of the three true solutions.

Zhang Hong's answer was obviously correct, which made Ji Chen surprised for a while.