"How is it? Have you learned anything?" With half an hour left, Fang Bai directly took back all the cards.

"Hey, Teacher Fang, you are so bad!"

"That's right, teacher, you're so sinister!"

"It's so bad. I've never seen someone as bad as you, Teacher."

The little carrot heads below complained.

In response to this, Fang Bai had to touch his nose in disappointment.

Xia Baihe suddenly raised her hand.

"Teacher, I think what you told us is the one you said last time, don't be self-righteous."

"Well, yes, it's not all right!" Fang Bai nodded, "Actually, this is called habitual self-righteousness."

"Why is it called habitual self-righteousness!"

"Do you know why I didn't kill myself when I got the werewolf for the first time?"

Fang Bai once again threw a problem.

"I know, because everyone doesn't know how to play at this time!" Hushou raised his hands actively.

"Absolutely, at the beginning, everyone was familiar with the rules of the game. Werewolf, they liked to kill good people on their first night, and the witch thought that the person they saved would definitely be good people."

“That’s a habit.”

"Habits are not a good thing, but they are not a bad thing. But the teacher hopes that everyone will not have to use their own experience to judge something with preconceptions, as this is easy to make mistakes."

Looking at the thoughtful little radish heads around him, Fang Bai decided to tell another story to help these little radish heads understand.

"Now, the teacher will tell you a story."

When he heard that the big devil was about to tell a story, all the little carrots couldn't help but sit up straight.

"Three people went to stay for a stay, and one night was thirty yuan. Each of the three people paid ten yuan and raised enough thirty yuan to give it to the boss. Later, the boss said that it only costs twenty-five yuan today, so he took five yuan and handed it to the waiter, asking the waiter to push it to these people."

"The waiter secretly hid two dollars, and each person refunded one dollar."

"In this case, everyone started to pay ten dollars, and then returned one dollar, which means each person took out nine dollars, and three people were twenty-seven dollars. Adding to the two dollars hidden by the waiter, it was twenty-nine dollars. So where did you go with one dollar?"

The little story Fang Bai told is a very classic preconceived story on earth. If you follow the process of this story, you will not get the answer, but if you calculate from the back to the front, it will be very simple.

When he heard the story of the big devil, all the little radish heads couldn't help but take out the paper and pen and start to gesture, but after a long time, the heads of these little radish heads could no longer turn.

I had to look at Fang Bai helplessly.

"have no idea……"

"Where did this dollar go?"

"That's right, I've forgotten it for a long time, but I just can't figure it out."

But Zhang Zihong looked at the numbers on his paper thoughtfully and frowned, "Teacher, you shouldn't calculate this way!"

"Oh?" Fang Bai smiled and looked at Zhang Zihong, "What should I count?"

"If we want to share this money, we have to calculate it from two directions. If we calculate it, the thirty dollars will be the twenty-five dollars taken by the boss, the two dollars taken by the waiter, and the one dollar taken by the last three people. This is the thirty dollars taken by the three people at the beginning."

"There is another angle?" Fang Bai asked,

"It's twenty-seven yuan, the boss's twenty-five yuan plus the waiter's two yuan." Zhang Zihong replied. After getting into the bottom layer, Zhang Zihong had already made great calculations about this kind of problem.

"Very good, actually, this is also very simple. We only need to see how much money three people spend!"

"We just need to regard three people as part of it, the boss and the waiter as part of it, so the problem will be solved."

"For the three people, the first part was given 30 yuan, the boss and the waiter got twenty-seven yuan, and finally they paid it back with three yuan left."

"Do you understand a lot if you say this?" Fang Bai asked.

Under Fang Bai's explanation, the little carrot nodded one after another. It is really easy to understand if you explain this.

"But... why can't we calculate it at the beginning?" Chen Yue raised her hand and asked.

"Because this is a preconceived concept, because the stories I tell come in a certain order, you just listen to my stories and calculate them in my order, and the answer you get is of course wrong."

"If you jump out and look at this problem in reverse, isn't this problem much simpler?"

Fang Bai shrugged.

"After all the time, it still comes down to the four words of self-righteousness!"

"So... do you understand what's happening today?"

Fang Bai smiled and looked at the bitter-faced little radish head below.

"Home! Family! Work! Home!"

All the little carrot heads sighed, it seemed that this had formed a routine. Every time the big demon teaches something new, he will definitely write a homework. Oh, I don’t know when such a day will end.

"Uncle and teacher, how far have you and my aunt developed?" Fang Bai held the child's hand on the way home from school.

"Ahem...ha?" Fang Bai pretended not to hear it.

"That's it... have you kissed me?" Luo Xue asked shyly.

Kiss? I dare to kiss? Do you know that your aunt almost ruined your uncle and teacher?

"This... hasn't yet." Fang Bai shook his head and said.

"Uncle and teacher, you have to hurry up. Many of my aunt are chasing me!" Luo Xue instructed like a little adult.

There are still many people chasing your aunt? Can you tell me how tall the grass on those people’s graves is?

"Okay, teacher, come on, come on!" Fang Bai had no choice but to deal with it.

"You must come on!" Luo Xue clenched her fists and said.

"Well, teacher, come on!"

...

On the side, the Shadow Guard listened quietly to the conversation between the two masters and disciples. These Shadow Guards have become more and more restless recently and have taken care of Fang Bai's lifelong affairs.

"You said, why don't we tie her aunt up and then add medicine!"

"Then tied up the Lord?"

"By the way, do you still love Yiqie?"

"Well, it's gone long ago, so I'm just going to give you a bad medicine!"

"But I have a new one, the latest blue version, one-day romance!"

"I like this!"

"By the way, I think the teacher named Mo in the college is pretty good. Should I tie it up together?"

"And then give the owner some more drugs?"

"Good idea...hehehehehe."
Chapter completed!