I, go to the parent-teacher meeting for my eldest niece!

Reasoning, the danger is high, the difficulty of mathematics, it is difficult to go to the sky!

This is the voice of every high school senior.

How many students have missed a book because they have planted in mathematics, physics and chemistry.

Learn mathematics, physics and chemistry well, and step on one book.

But where is mathematics, physics and chemistry so easy to learn?

Wang Yi actually said wildly that “you can’t see a difficult word with a lantern”, which was really too arrogant, and suddenly poked the self-esteem of all students.

“Uncle, it’s hard not to write on paper!”

Zhang Qianqian felt that Wang Yi drank high.

“Don’t distort my literal meaning, I would like to see how difficult your math and theory are here.”

Wang Yi had a serious expression, wanted to lead by example, and first opened Zhang Qianqian’s math paper.

The parents around them all have a good look on their faces, and they have reprimanded their children like this in the past, but when they opened the paper, they found that they couldn’t do anything, and they couldn’t even do the right language.

Wang Yi pointed to a question on the math scroll and scolded Zhang Qianqian: “Given that a circle with a radius of 1 passes through the point (3,4), what is the minimum value of the distance from its center to the origin?” ”

No one around knew “why”, and everyone did not believe that Wang Yi could know, they were all quietly watching Wang Yi pretending to be forced, so they wanted to see the moment when Wang Yi was instantly confused.

“Why?”

Zhang Qianqian Nuono asked.

Last night, Wang Yi showed a strong talent for mathematics, and Zhang Qianqian really felt that Wang Yi could answer.

But in the eyes of the surrounding parents, they felt that Zhang Qianqian was deliberately putting Wang Yi’s army so that Wang Yi could not get off the stage in front of everyone, and suddenly felt that this little girl was really bad.

“You are really an elm head, such a simple question, you can see it at a glance, the minimum value is 4 ah, hook three strands and four xuanfive, 5 and then subtract the radius 1, isn’t it 4?” Such a simple Pythagorean theorem problem appeared on the test paper, you actually did it wrong, how is your head long? ”

Wang Yi explained to Zhang Qianqian while reprimanding Zhang Qianqian.

Although Wang Yi’s explanation was extremely rude, but the effect was very good, Zhang Qianqian suddenly opened her mouth, and her eyes lit up: “Yes, such a simple question, why didn’t I do it right?” ”

Seeing Zhang Qianqian have such a reaction, the people around were all stunned: What is the situation? Did this imp really do it right? When will parents do math problems?

Gao Junqin is a Chinese teacher, and she doesn’t know if what Wang Yi said is right or wrong, so she picked up the test paper of the first place Zhu Ganglie and compared it, and found that the correct answer was really 4.

“Little friend, how did you come up with this question?”

Gao Junqin looked at Wang Yi in disbelief.

“Is this still being used? Can you see it at a glance? ”

Wang Yi just said something that he thought was normal, but in the eyes of the people around him, he was so arrogant.

You can see it at a glance, you think you are Erlang God?

“What about this question?”

Gao Junqin casually found a question for Wang Yi: “Given that the lateral area of a cone is 2π, and its side expansion is a semicircle, what is the radius of the base of this cone?” ”

“Such a simple question, does this still need to be asked? The radius, of course, is 1. ”

Wang Yi just listened once and said the answer.

Gao Junqin picked up Zhu Ganglie’s test paper again and corrected the answer, and found that the answer was really 1.

“Is it so amazing?”

Gao Junqin looked at Wang Yi in confusion and asked, “How did you figure it out?” ”

“It’s not easy? Like this decimal simple math fill-in-the-blank question, the answer is either plus or minus 1 or 0, this requires the radius of the base circle, then it is certainly not negative 1 and 0, and the elimination method can get the result of 1. ”

Wang Yi had a natural expression.

The surrounding students and parents are confused, can they still do this?

“What about fill-in-the-blank questions with large values?”

Zhang Qianqian asked curiously.

“That’s simpler, last year it was 2019, this year it’s 2020, next year it’s 2021.”

“We know the year, but what’s the answer?”

“What I’m talking about is the answer, the 2020 exam question, the answer is 2019, don’t the questioners feel embarrassed? If it is a large value, the answer to the fill-in-the-blank question in 2020 must be 2020, and the more difficult the question is, the more this result is, so as to reflect the level of the questioner. ”

Although Wang Yi’s explanation was rough, it was easy to understand, and everyone understood.

I didn’t expect that there was actually this kind of problem-solving skill, and everyone lived half of their lives in vain.

Everyone thought that Wang Yi had the right question by skill, but Gao Junqin didn’t think so.

How could a person who does not have a strong ability to do questions summarize such incisive skills?

“Little friend, can you use conventional algorithms to come up with the correct answer?”

Gao Junqin looked at Wang Yi with a serious and solemn expression.

“Yes, it’s as simple as a 1.”

Wang Yi had a casual expression.

The people around didn’t expect Wang Yi to answer this way, and they wanted to see how Wang Yi did it.

“The area of the semicircle is 2π, the radius is 2, the cone formed by the semicircle, the radius of the semicircle and the diameter of the base circle form an equilateral triangle, the diameter of the base circle is 2, and the radius is of course 1.”

“How do you know it’s an equilateral triangle?”

Zhang Qianqian asked suspiciously.

“The definition in the book, I just saw it yesterday when I read your math book, and I will learn to use dim sum in the future.”

“Woo-hoo, if I knew that an equilateral triangle was formed, I wouldn’t be wrong with this question.”

“Teach you another little skill to do the problem, encounter a triangle, as long as there are numbers related to 3, 4, 5 or 5, 12, 13, it must be using the Pythagorean theorem, if there are no these numbers, it is definitely an equilateral triangle, directly out of the answer, there is no need to calculate.”

Hearing Wang Yi’s words, the people around were stunned again, there was actually such a problem-making skill, why did the math teacher never say it?

Gao Junqin found that he had found the treasure and asked Wang Yi excitedly:

“Little friend, you are simply a mathematical genius, but I don’t know how talented you are?”