While it is true that some things can be achieved by being opportunistic, this is not what the teachers want to teach the children in this class. Teacher Mu first praised Xixi, who was meticulous in his observation, and then drew a line on the small blackboard.

The small blackboard used by Mr. Mu is a magnetic blackboard, and the chalk is also water-soluble dust-free chalk, which is more protective for the children's health.

After Mr. Mu finished drawing this long white line, he said to the children: "Let's say, for example, this is a line that my mother wants to cut, okay?"

Then the blackboard eraser in Xixi's hand is the scissors in her mother's hand, if we erase it a little like this, it will be cut. Teacher Mu handed the blackboard eraser to Xi Xi, taught her to make a gesture, and then encouraged, "Come on, Xi Xi, you try to see how many times you have to cut it to five sections, slow down......

Xixi's favorite is this link, she can cooperate with the teacher to do "experiments" together, and Lu Weisha and Yang Luoqi are all envious in the stands.

I saw that the little girl happily picked up the blackboard eraser and wiped it with the corner of the place where the teacher had just compared.

"How many paragraphs is now?" asked Teacher Mu.

"Two paragraphs!" Xi Xi raised her little head and answered quickly, this little question could not help the smart Xi Xi.

"Go on, cut to five and stop. Teacher Mu encouraged.

Xixi understood quickly, and when she cut to the fourth time, she stopped, but the little girl still hesitated.

"How many paragraphs is now?" asked Teacher Mu.

Xi Xi counted it, only to hear the little girl's voice crisp like a big bead and a small bead falling on a jade plate, and counted happily: "One, two, three, four, five......"

"Is it the fifth stage?" asked Teacher Mu with a smile.

The children in the audience were not willing to be lonely at this time, and they scrambled to call "five paragraphs".

Xixi also nodded, but after the little girl nodded, she hesitated again and asked the question in her heart: "But, teacher, I only cut it four times!"

The little girl was confused and wondered by this.

How did you just cut it four times?

Teacher Mu explained with a smile: "When we usually give fruit to the children, if we want to divide a watermelon to two children, do we have to cut it from the middle?

Usually Teacher Mu cuts watermelon like this, and the greedy children are sometimes stopped by Teacher Cai and Teacher Shen, drooling from a distance to watch Teacher Mu cut watermelon.

In this way, it is easy to understand, and Mr. Mu then used the same principle of cutting watermelon to explain the principle of cutting the rope into five sections four times.

However, unlike the other questions, the answer to this question is open-ended, and there is not only one!

Teacher Mu smiled again and said, "Although it is possible to cut a rope into five sections in four times, in order to save effort and time, the teacher only needs to cut a rope into five sections once in order to save effort and time." ”

Only need to cut it once?

The children who reacted quickly had already screamed "wow", and the children who reacted a little slower still looked at the teacher in a daze: "What is the teacher talking about?"

Xixi belonged to the former, but she didn't have a "wow", she was surprised: didn't she need to cut it four times? Why did the teacher say that cutting it once was enough?

The little girl's mind was full of curiosity at the moment, and her big watery eyes looked up at Teacher Mu, and she was reluctant to blink, as if she was waiting for Teacher Mu to stage a moment to witness a miracle!

Teacher Mu didn't let Xixi return to her position, she really took out a long red plastic wrapping rope at this moment, and said with a smile: "Xixi, the teacher needs you to do the teacher a favor now." ”

"Yes!" the little girl readily agreed.

Teacher Mu asked Xixi to fold the packing rope in half twice, and then grabbed the two ends and held them in his hands.

"Now the teacher has to cut it from the middle!" Teacher Mu asked Xixi to hold the packing rope sideways, so that her scissors did not have to be pointed at Xixi, and other children could see it.

But when Xixi saw the bright scissors between her two little hands, she couldn't help but whisper to Teacher Mu, "Teacher, I'm afraid ......"

"Don't be afraid, the teacher will be very careful. Teacher Mu comforted Xixi softly.

At this moment, it is really a moment to witness a miracle, and even the most skinny Wang Xijun doesn't care about the noise at the moment, and looks nervously at Mr. Mu's scissors.

The scissors clicked and cut the packing rope in Xixi's hand, Teacher Mu didn't rush to speak, but first put away the scissors, a sharp weapon that is very dangerous for children, locked it, and then took out a handful of colorful tiles, and asked Xixi to count how many pieces of packaging rope there are in his hand.

In order to let other children see the results of counting more intuitively, Teacher Mu also asked Xixi to hand one to herself after counting, and she used a magnet to stick the packaging tape on the magnetic blackboard.

"One, two, three......" Xixi thought, but she was not alone in counting, and the other children also shouted excitedly.

It's as if they're hoping for a miracle!

Finally, counting to the fifth, Xixi spread her empty hands with a smile of surprise in her eyes, and said in surprise and joy: "No!"

"Is it the fifth stage?" asked Teacher Mu with a smile.

"It's the fifth stage! it's amazing!" Chen Shiyun shouted eagerly with a few children below.

Xixi also nodded, but she soon discovered something, the little girl pointed to the packaging rope on the blackboard and said, "But, teacher, the rope is too short!"

After folding, the cut from the middle is, of course, of different lengths, some are very long, some are very short.

"It doesn't matter, because our question is, how can mom cut it into five sections, it's not like five sections of the same length, so it's okay to cut it into five sections just by cutting it once. Teacher Mu had a headache in the face of Xixi's observation ability, so he could only explain it like this.

Why is it a five-stage slash?

Teacher Mu did not explain, but left a space for the children to think, she also gave each child a packing rope for them to study on their own small table, and after going back, with the help of their parents, to study whether they could use other cutting times to cut into five?

……

In the afternoon, Yang Yi brought Xixi back, and the little girl couldn't wait to tell her father about the new knowledge she had learned today.

"This is very good!" Yang Yi said with a smile, "Dad will study with you tonight, not just once or four times, there are many possibilities in between." Moreover, let's take a look at how to fold it so that we can cut the rope into five lengths of rope with as much a knife as possible. ”

"Yes, yes!" the little girl nodded yearningly.

However, it wasn't just Yang Yi and Xixi who were studying the rope at night, Lan Xin also joined in.

Lanzhou Kai went to Wucheng County, Jinling City to help Yang Yi buy land, he was not at home for a long time on a business trip, and Yang Yi had to help guide Lan Xin's study!

Of course, the two little girls got together, playing and learning, learning to play, and this interest became even stronger.

"You have to cut watermelon with one knife, one knife to cut, because watermelon is bigger, but for apples, you can cut it in half with one knife, put the two halves together, and then cut it into four parts with one knife......" When Yang Yi instructed the two little girls to play with folding ropes, Murphy also hugged Xiao Yu and watched with a smile.

"Sister, you learn quickly, you learn, when my brother and I grow up, you can teach me, okay?" Murphy picked up Xiao Yu upright, so that he could sit in his arms by relying on his arms, and then shook the little guy's little hand, and said in the tone of Xiao Yu's character.

Xi Xi heard this, she raised her little head, and her eyes moved from the rope in her hand to her younger brother.

"Giggles, that's numbness, am I my brother's teacher?" said the little girl, laughing happily and with great interest.