"As in all disciplines, in the field of mathematics, there is an element of talent that does ......"

In the classroom, Alexei's gaze slowly swept over the immature faces in the classroom, and he whispered unhurriedly.

As the deputy director of the top nuclear physics institute in the former Soviet Union, he is not the kind of scholar who can only do research, and with some scripted prompts, it is not difficult to create an atmosphere to frighten these eleven or twelve-year-old children.

As the middle-aged man's gaze swept over, the classroom gradually fell silent.

Even the children from pure-blood wizarding families who had the most opinions on this matter, except for a hint of dissatisfaction on their faces, stopped talking, and in Hogwarts, including a certain white-haired ball that was not afraid of heaven and earth, there were no problem students who were so arrogant as to directly violate discipline in class - maybe there were, but most of them became school weirdos.

In front of the podium at the front of the classroom, Alexei continued the opening remarks that Elena had helped to "adjust".

"However, in the course of mathematics, until you have put in a certain level of effort, you will not touch the so-called bottleneck of mathematical talent for the time being. Therefore, if you fail the final exam for your own reasons, you may still repeat a grade according to Hogwarts School of Witchcraft and Wizardry...... Of course, I'm sure none of you will. ”

Hearing this, the little wizards exchanged glances with each other, and gradually put away the indifferent expressions on their faces.

No matter what they thought in their hearts, it was a foolish thing to do in front of a professor in this class as it stood so far — especially when the threat was so clearly in their ears.

"Professor Dumbledore has told me that many great wizards are unusually weak in logical reasoning and mathematical thinking compared to their talents in the field of magic, which often becomes an obstacle to their next step, or a fatal shortcoming, ....... ”

Alexey's voice gradually became low and solemn, and the little wizards subconsciously held their breath and looked nervously at the podium.

"In addition, it is also a very important survival skill - Miss Abbot. ”

At that moment, Alexei suddenly turned his head to look at Hannah Abbot, who was sitting directly across from him, and raised his voice slightly.

"I've heard that your family has been running a wizard bar on the high street for nearly 100 years, so how do you think you should assess the business of the bar, and on what basis do you determine that the bar is in a virtuous circle?"

"Eh, it should be...... It's not bad, there are still quite a lot of customers every day-"

When she heard her name, Hannah was startled at first, and then replied a little nervously.

"The number of people does not represent profits, the food consumed, the charcoal, the wages of the employees...... These are all costs, have you ever thought that you have been operating at a loss, but the adults in the family have not told you the news?"

Alexei said calmly, glancing lightly at the "lesson plan" on the table.

"Especially if you still depend on this income for all your household expenses, and after this course, at least you can set up a basic loan accounting entry, which can answer my question in the first place, without having to go to the vaults of Gringotts Wizarding Bank and recount the total amount of assets little by little-"

"Uh-huh. I will definitely study hard in the future, don't worry, definitely!"

Hannah Abbott swallowed a little nervously, and replied with a solemn face.

In Elena's rather satisfied look, the corners of Alexey's mouth twitched, and he sighed helplessly in his heart.

If it weren't for the majesty of this Destiny Lady and the request of his own teacher, he would have been discussing the subject in the research room at this time, instead of accompanying a group of twelve or thirteen-year-old little guys here, playing this extremely childish persuasion performance.

However, judging from the current situation, Elena's previous advice is indeed very effective.

At least during this question, the curious looks on the faces of the other little ones in the classroom became more and more intense.

You know, one of the most important purposes of Elena helping Alex prepare these opening remarks was to show in silence that Alex was not any ordinary Muggle who knew nothing about the wizarding world - whether it was the Cauldron or Albus Dumbledore's words, it was all proof of Alexsay's identity.

Among them, Tie Hanhan, as the head of the third sister, is undoubtedly the easiest object to be the audience.

Alexei looked around at the students in the classroom, turned to the blackboard and began to write.

"This year's course covers two main sections. In the first semester, we mainly studied number theory, which is the main branch of pure mathematics, which includes simple four-rule operations, simple equations, ...... Actually, it's called arithmetic. ”

"First, we learn the first content, how to write and read numbers from 1 to 100. ”

"But this may be a little different from the numbers you have learned before, in today's lesson, I will teach you how to write and read the hundred numbers in French, you can think of it as a fun math lesson, or you can think of it as a special foreign language class——"

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It's a little short, sorry, I really don't have time to write woo woo......