Xueba: The knowledge I taught will be returned by crit

Parallel world, Blue Star.

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Title:

[A and B climb the mountain, A reaches the top of the mountain B is still 400 meters from the top of the mountain, A and B go down the mountain at twice the speed of going up the mountain, and when A reaches the bottom of the mountain, B is halfway up the mountain, ask:].

【How tall is the mountain?】 】

In a small but cozy ‘princess room’ bedroom, the young man frowned and his eyes fixed on the topics in the exercise book.

He…. In the effort to solve this problem.

This young man’s name was Gu Bai, a first-year college student at Lin Hai University.

Gu Bai, who has a modest family, chose to work part-time in his freshman year.

Not serving plates, not handing out flyers, but tutoring.

It’s still the 1vs1 kind.

Because he had no teaching experience before, Gu Bai did not choose to teach junior high school and high school, but chose a simple primary school.

Primary School Teaching Counseling?

Simple, easy, easy, just have hands….

As a contemporary college student, Gu Bai teaches primary school students to be confident and properly dimensionality reduction.

However.

The truth was beyond Gu Bai’s expectations.

The dimensionality reduction blow did not happen, it was simple and easy, there was a feeling of having a hand, and it did not occur.

Instead… Gu Bai felt a little strained.

Of course, if you use the equation method, Gu Bai can solve it.

But… This is an elementary school topic, and grade 6 elementary school students don’t learn unary multiple equations at all.

What to talk about the equation to solve this topic.

Faced with this topic, Gu Bai had to become serious again and change his thinking.

The brain is running at high speed, thinking of various ways to solve the problem in front of you.

However.

Gu Bai was still helpless.

“I’m also a college student, although I’m not a famous brand, but will I have such a hard time dealing with elementary school topics?”

“Shouldn’t you have gone to a fake college?”

“Or do you say…. Are the current elementary school questions starting to roll in? ”

Gu Bai sighed, a little skeptical of life.

“Teacher, I don’t have another topic here.”

At this time, Li Sisi handed over the test paper in his hand and pointed to another topic on the test paper.

Gu Bai smiled and looked at the topic, silently noted it, and then got up and said: “Sisi, you continue to do the following topic first, the teacher has drunk too much water and has to go to the toilet.” ”

After that, Gu Bai calmly got up and walked towards the bathroom, ready to find ‘Qiandu’ for help.

……

Shut the door.

Gu Bai washed his face with water and let himself relax.

Good fellow, it was really a shame just now.

The dimensionality reduction blow was not done, but it was not possible by the primary school question paper.

You guessed right, the second question asked by Li Sisi, Gu Bai may still not be able to do it…

Whew~~

Taking a deep breath, Gu Bai sorted out his thoughts.

Volume, now elementary school topics are really too rolled.

Dried his hands with a paper towel, without delaying time, Gu Bai immediately took out his mobile phone and opened Qiandu, searching: [A and B climbed the mountain, A reached the top of the mountain B is still 400 meters away from the top of the mountain…..].

Instantly, many web pages pop up….

Just when Gu Bai was about to click on one ready to view.

A mechanical version of the voice came to my head.

“Ding, ding, ding.”

“Super Lesson System is binding…”

“The super teaching system is a success.”

Listening to the mechanical voice in his mind, Gu Bai was stunned for a moment, and then his face showed a touch of joy.

He had read novels, and he had to read them for hours every night before falling asleep.

So he is no stranger to the system.

After understanding the function of the system, Gu Bai’s eyes lit up.

The super teaching system, as the name suggests, is taught and taught.

However, according to Gu Bai’s simple understanding of the system just now, he found that the system is not as simple as teaching and teaching.

The system not only has the ability to teach and bless BUUF, but also has the function of returning 100 times the teaching.

What to return? It is not stated on the system.

Panacea? Genetic agents?

Probably not.

The high probability is related to the topic and knowledge.

After Gu Bai pondered and understood, he was overjoyed.

He is not greedy, although the system is not directly invincible, but … With this teaching system, teaching little by little, it is only a matter of time before you become a super student.

Gu Bai did not continue to study the system in depth, and after reading the answers to the questions given by netizens on Qiandu, he sorted out his hairstyle in the mirror and smiled faintly: “The sea of stars of Xueba, starting from teaching elementary school students math problems…”

…………………

“Teacher, why did you go to the toilet for so long.”

As soon as he entered the door, Li Sisi’s voice was heard.

At this time, she raised her head and glared at a pair of Kazilan’s big eyes, and said suspiciously: “Teacher, shouldn’t you have gone to Qiandu?” ”

“How is it possible.”

Gu Bai, who was spoken, did not panic at all, he smiled calmly and said: “I still use a thousand degrees for a primary school topic, you are too underestimating college students.” ”

Walked to Li Sisi’s desk, pulled the stool and sat down, habitually turned the signing pen, copied the draft and said:

“Here, look at the question.”

After speaking, Gu Bai quickly wrote and drew on the scratch paper.

“The amount given by the question has distance, speed, time, and it is not difficult to conclude from the question that the time they use is the same.

Therefore, when the walking time of the two people is the same, the distance between the two people satisfies the relationship of “speed difference× time = distance difference”.

On the ascent, A was 400 meters ahead of B. When descending the mountain, if A and B start from the top of the mountain at the same time, because the speed of the two people doubles at the same time, the time for A to go down the mountain becomes half of the time to go up the mountain, and “the speed difference doubles and the time becomes 1/2″, so the distance A leads B when A reaches the foot of the mountain is still 400 meters….”

“…… Therefore, in the end, it can be concluded that the distance up the mountain is 2400 meters, that is, the height of the mountain is 2400 meters. ”

How to say, Gu Bai is also a contemporary college student.

After seeing the answer given on Thousand Degrees and understanding the logical points of the question, Gu Bai quickly straightened out the key points of the question.

The key point of this mountain topic is that the time is the same, and the speed ratio is used to find the distance ratio, and then find the mountain height.

Soon, Gu Bai asked for the final answer, he looked at Li Sisi with a smile and said: “The final result is 2400m, isn’t it very simple, isn’t it very easy, is it just a hand?” ”

The elementary school topic wanted to roll up to me, and there was no door.

No, it’s the door that welds you in.

After solving this topic, Gu Bai’s unhappiness in his heart just now was finally vented.

Can I, a college student, be stumped by elementary school topics?

“This…” Li Sisi, who was sitting in the seat, was a little incredulous, her small mouth opened slightly, and her eyes widened.

Of course… It was not because Gu Bai solved this topic, but because she…

Understood.

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