Although opportunistic methods could achieve some goals, this was not what the teachers wanted to impart to the children. Mr. Mu first praised Xi Xi for her meticulous observation, then drew a line on the small blackboard.
Mr. Mu used a magnetic blackboard, and the chalk was water-soluble dust-free chalk, which was better for the children's health.
After Mr. Mu finished drawing the long white line, he said to the children, "For example, this is a line that Mommy wants to cut, okay?"
"Then, the blackboard eraser in Xi Xi's hand is the scissors in Mommy's hand. If we erase a little bit like this, we can cut it open." Mr. Mu handed the blackboard eraser to Xi Xi and taught her how to draw. Then, he encouraged her, "Come, Xi Xi, try and see how many times you have to cut it into five sections. Slow down …"
Xixi liked this segment the most. She could cooperate with the teacher to do "experiments". Lu Weisha, Yang Luoqi, and the others in the audience looked envious.
The little girl happily picked up the blackboard eraser and used the corner of the eraser to erase the line that the teacher had just drawn.
"How many sections are you at now?" Mr. Mu asked.
"Two sections!" Xi Xi raised her head and answered quickly. This little problem could not stump the smart Xi Xi.
"Continue. Stop when you reach five sections," Mr. Mu encouraged.
Xi Xi understood very quickly. When she reached the fourth section, she stopped. However, the little girl was still a little hesitant.
"How many sections are you at now?" Mr. Mu asked.
Xi Xi started counting. The little girl's voice was as clear as pearls falling on a jade plate. She counted clearly, "One, two, three, four, five …"
"Is it five sections?" Mr. Mu asked with a smile.
The children below the stage were not willing to be left out. They scrambled to call out "five sections."
Xi Xi also nodded. However, after the little girl nodded, she hesitated and asked the question in her heart, "But, Mr. Mu, I only cut it four times!"
The little girl was puzzled and amazed.
Why did he only cut it four times?
Teacher Mu explained with a smile, "When we usually give the children fruits to eat, if we want to share a watermelon with two children, do we have to cut it in the middle? Then, if you want to divide it among the four children, do you have to cut each of the two halves of the watermelon once after cutting it once, for a total of three cuts? "
Usually, Teacher Mu cut watermelons like this. Sometimes, the greedy children would be stopped by Teacher Cai and Teacher Shen. They would drool from afar as they watched Teacher Mu cut watermelons. At this moment, they all reacted quickly and shouted in response.
Then it was easy to understand. Teacher Mu then used the principle of cutting a watermelon to explain the principle of cutting a rope into five sections.
However, it was different from the other questions. The answer to this question was open, and there was more than one answer!
Teacher Mu smiled and said, "Although I can cut a rope into five pieces after four tries, in order to save energy and time, I only need to cut one rope into five pieces."
He only needed to cut it once?
The children who reacted quickly had already cried out. The children who reacted slower still looked at the teacher in a daze. "What is the teacher talking about?"
Xi Xi belonged to the former, but she did not cry out in surprise. She was very surprised. Didn't he need to cut it four times? Why did the teacher say that he only needed to cut it once?
At this moment, the little girl's mind was filled with a thirst for knowledge. She looked up at Teacher Mu with her big, watery eyes, unwilling to blink. It was as if she was waiting for Teacher Mu to perform a miracle!
Teacher Mu did not let Xi Xi return to her seat. At this moment, she really took out a long red plastic packaging rope and said with a smile, "Xi Xi, I need you to do me a favor now."
"Okay!" The little girl agreed readily.
Teacher Mu asked Xi Xi to hold the packaging rope and fold it twice. Then, she held both ends in her hands.
"Now, I'm going to cut it from the middle!" Teacher Mu asked Xi Xi to hold the packaging rope sideways. This way, the scissors could be seen by the other children without facing Xi Xi.
However, when Xi Xi saw the bright scissors between her two small hands, she could not help but whisper to Teacher Mu, "Teacher, I'm scared …"
"Don't be afraid. I'll be very careful." Teacher Mu comforted Xi Xi softly.
At this moment, it was really the moment to witness a miracle. Even the naughtiest Wang Xijuan did not care about making noise at this moment. She nervously looked at Teacher Mu's scissors.
With a click, the scissors cut the packaging rope in Xi Xi's hands. Teacher Mu was not in a hurry to speak. Instead, she first put away the scissors, which were very dangerous to children, and locked it. Then, she took out a handful of colorful magnets and asked Xi Xi to count how many pieces of packaging rope were in her hands.
In order to let the other children see the result of counting more directly, Teacher Mu also asked Xi Xi to pass one piece of packaging rope to her after she finished counting. She used magnets to attach the packaging rope to the magnetic blackboard.
"One, two, three …" Xi Xi counted. However, she was not the only one counting. The other children also shouted excitedly.
It was as if they were also looking forward to a miracle!
When she finally counted to the fifth piece, Xi Xi's eyes were filled with surprise and joy. She spread out her empty hands and said in surprise and joy, "There's no more!"
"Is it the fifth piece?" Teacher Mu asked with a smile.
"It's the fifth piece! It's amazing! "Chen Shiyun, who was below, could not wait to shout with the other children.
Xi Xi also nodded. However, she soon discovered something. The little girl pointed at the packaging rope on the blackboard and said, "But, Teacher, the rope, and this one are too short!"
After folding and cutting from the middle, of course, the lengths were different. Some were very long, and some were very short.
"It's okay. Because our problem is, Mom, how can we cut it into five pieces? We don't need five pieces that are exactly the same length. Therefore, we only need to cut it once to cut it into five pieces. It's still possible." Teacher Mu had a headache facing Xi Xi's observation ability. She could only explain it in this way.
Why was it cut into five pieces in one cut?
Miss Mu did not explain. Instead, she gave the children some space to think. She even gave each child a wrapping rope and asked them to study it on their little table. When they returned home, with the help of their parents, they could study whether they could cut the wrapping rope into five strips using different cutting times.
…
In the afternoon, Yang Yi brought Xi Xi back. The little girl could not wait to tell her father the new knowledge she had learned today.
"This is very good!" Yang Yi said with a smile. "Tonight, Dad and you will study it together. It's not just one or four times. There are many possibilities in between. Moreover, let's look at how to fold it so that we can cut the rope into five pieces of rope that are about the same length as possible. "
"Okay, okay!" The little girl nodded eagerly.
However, in the evening, not only Yang Yi and Xi Xi were studying the rope, but Lan Xin also joined in.
Lanzhou Kai went to Jinling City's Wucheng County to help Yang Yi buy land. He was on a business trip for a long time and was not at home. Yang Yi had to help guide Lan Xin in her studies!
Of course, when the two little girls got together to play and learn, they became more interested.
"You need to cut a watermelon with one cut because a watermelon is relatively big. But for an Apple, you can cut it into two halves with one cut. The two halves are put together, and then you can cut it into four pieces with another cut …" When Yang Yi was guiding the two little girls to play with the folding rope, Murphy was also holding Tong Tong and watching with a smile.
"Sister, hurry up and learn. Once you've learned it, you can teach me when I grow up, okay?" Murphy lifted Tong Tong up vertically so that he could lean against her and sit in her arms. Then, she shook the little guy's little hand and said in the tone of Tong Tong's character.
When Xi Xi heard it, she raised her head and looked from the rope in her hands to her little brother.
"Hehe, then Mom, am I little brother's teacher?" The little girl laughed happily and asked with great interest.
You've already exceeded your reading limit for today. If you want to read more, please log in.
Login
Select text and click 'Report' to let us know about any bad translation.
