Joyful Youth: Many Children, Many Blessings, Starting with Song Qian

"can."

Qin Feng nodded: "If you lose, then you'll be responsible for cleaning the blackboard for the mentor for a month."

"Haha, this is good."

The teacher heard this,

He smiled and nodded at Qin Feng.

At this time, Zhu Yun,

She raised her chin at Qin Feng and said stubbornly, "Okay, I promise you."

finished,

Zhu Yun walked up to the podium, picked up the chalk, and began to do calculations.

And all the students present,

At this moment, everyone, along with Qin Feng and their mentor, looked at the blackboard, waiting for the final result.

At the beginning,

Zhu Yun wrote very quickly.

However, when I had written one-third of the solution process...

Zhu Yun stopped.

I reviewed my calculation process again.

Then my face turned red instantly.

After checking each of the previous calculation steps repeatedly,

Zhu Yun knew,

When it came to the point where I stopped writing...

She has made many mistakes.

It's like I'm making a mistake at every step I take.

This situation is exactly as Qin Feng described.

The third interpretation of Zhu Yun

It was wrong from the very beginning.

It was only because Zhu Yun knew the detailed solution and the correct answer to this question that...

That's why they went along with the mistake.

Continuously correct numerical values ​​during the incorrect problem-solving process.

In the end, I actually got the correct answer by writing it incorrectly!

Zhu Yun knew,

I've already made a huge mistake.

But at this time,

So many eyes were watching me from behind.

and,

He had just confidently made a bet with Qin Feng.

If you just put down the chalk and admit defeat...

He would definitely be mercilessly ridiculed by Qin Feng and his classmates.

Therefore,

After thinking about it carefully for a while,

Zhu Yun then steeled herself and...

Picking up the chalk again, I continued my calculations on the blackboard...

Seeing that Zhu Yun knew her mistake but did not correct it,

The tutor frowned slightly.

Subsequently,

He met Qin Feng's gaze, smiled helplessly, and shook his head.

Among many disciplines,

Mathematics has the most rigorous requirements.

Wrong.

That's wrong.

Even if it's just a single symbol or a single unit that's wrong,

All of these will directly affect the final result of the mathematical calculation.

Two minutes later,

Zhu Yun stopped writing again.

She carefully checked all her calculations over and over again.

Knowing that I have made a terrible mistake,

But Zhu Yun always felt that there was nothing wrong with her approach to solving the problem.

She bit her lip tightly.

Zhu Yun carefully checked the entire calculation process once again.

Finally, he had to accept his defeat.

Then he let out a soft sigh.

Turn around slowly,

He bowed deeply to his professors and classmates, apologizing: "I'm sorry, teacher, I'm sorry, Qin Feng, I'm sorry, classmates..."

"The teacher and Qin Feng are right. I got this problem wrong from the very beginning, and every step I took afterward was just adding more mistakes to my calculations..."

Seeing that Zhu Yun immediately bowed and apologized to him and his classmates after realizing what had happened,

The supervisor's attitude was somewhat approving.

He nodded and said, "Zhu Yun, mathematics does require a spirit of perseverance, but it's not about admitting your mistakes and accepting them as they are."

"Fortunately, you have now admitted your mistake and apologized to me and everyone else."

"Actually, just as Qin Feng said, your problem-solving approach is not wrong, but the problem lies in your first step, because you made a mistake in the first step."

The tutor turned to Qin Feng and asked, "Qin Feng, can you solve this problem correctly using Zhu Yun's problem-solving approach?"

"Yes, teacher."

Qin Feng nodded and slowly walked onto the podium.

Seeing that Zhu Yun was standing still,

Qin Feng smiled and reminded her, "Zhu Yun, it's time to erase the blackboard!"

"understood."

Although Zhu Yun was still somewhat resentful of Qin Feng,

However, he still obediently picked up the blackboard eraser.

Then erase your entire solution process.

then,

554707555

Zhu Yun looked at Qin Feng, waiting for him to write out the solution and answer.

"Teacher, students."

Qin Feng wrote down several key data points for the problem on the blackboard.

He then said loudly, "Although Zhu Yun's solution is feasible, it is actually a bit roundabout compared to the conventional method."

"To give an analogy, this question is like getting from point A to point B. The conventional method that the teacher teaches the students is the most common, but it is also the shortest and has the best road conditions."

"Zhu Yun's solution is to first go from point A to point C, then cross the path to point D, and then cross the river from point D to point B."

"Although this is indeed a solution approach, it involves much more steps and is much more complicated than the conventional method."

"Therefore, this approach can be used to show off skills, but it is not very practical."

Qin Feng said,

First, write out the standard problem-solving process on the blackboard.

then,