House Dad’s Literary Life Chapter 704: Not just an answer (3/4)
Remember [lnmao.org] in one second, fast update, no pop-up window, free to read!
Although speculation and coincidence can indeed achieve some goals, this is not what the teachers in this class want to teach to their children. Teacher Mu first praised the meticulous Xixi, and then drew a line on the small blackboard.
Ms. Mu ’s small blackboard is a magnetic blackboard, and the chalk is also water-soluble dust-free chalk, which is relatively safe for children ’s health.
After seeing Mr. Mu finish drawing this long white line, he said to the children: "For example, this is a line that my mother wants to cut, okay?"
"Then the eraser in Xixi's hand is the scissors in my mother's hand. If we wipe it off a bit like this, even if we cut it." Teacher Mu handed the eraser to Xixi and taught her to make a gesture, Then encourage, "Come on, Xixi, try it out, see how many times you need to cut it into five segments, slower ..."
Xi Xi ’s favorite is this link. You can cooperate with the teacher to do the “experiment”. Under the stands, Lu Weisha and Yang Luoqi are all envious.
I saw the little girl gladly picked up the blackboard eraser, and wiped it with the corners, following the teacher's gesture.
"How many paragraphs is it now?" Mu asked.
"Two paragraphs!" Xi Xi lifted her small head and answered quickly. This small question could not help the smart Xi Xi.
"Continue, cut to five paragraphs and stop." Teacher Mu encouraged.
Xi Xi realized quickly, and when she cut to the fourth, she stopped, but the little girl still had some hesitations.
"How many paragraphs is it now?" Mu asked.
Xixi counted up, and only heard the little girl ’s voice be as crisp as a big bead and a small bead on a jade plate, and counted happily: "One, two, three, four, five ..."
"Is it five paragraphs?" Teacher Mu asked with a smile.
The children in the audience were unwilling to be lonely at this time.
Xi Xi also nodded, but after the girl nodded, hesitated again and raised the question in her mind: "But, teacher, I only cut it four times!"
The little girl is confused and magical about this.
Why did you just cut it four times?
Mr. Mu smiled and explained: "When we usually eat fruit for children, if one watermelon is to be divided between two children, is it necessary to cut a knife in the middle? Then if it is to be divided among four children, is it cut? After a knife, we still have to cut the two halves of the watermelon, respectively, a total of three knives? "
Music Mu usually cuts watermelon in this way. The greedy children are sometimes stopped by Teacher Cai and Mr. Shen, drooling to watch Mr. Mu cut watermelon from afar , Shouted in response.
It ’s easy to understand. Teacher Mu then explained the principle of cutting the rope into five segments by cutting the watermelon in the same way.
However, unlike other questions, the answer to this question is open, not just one!
Mr. Mu said again with a smile: "Although it can be cut four times in one rope, but in order to save energy and time, the teacher only needs to cut once to cut a rope into five segments."
Only cut once?
The children who responded quickly had wowed, and the children who responded slowly looked at the teacher confusedly: "What is the teacher saying?"
Xi Xi belongs to the former, but she doesn't have "wow", she is surprised: isn't it necessary to cut it four times? Why does the teacher say it can be cut once?
The little girl is full of curiosity in her mind at this moment. Her big watery eyes are looking up to Teacher Mu, and they are reluctant to blink, as if waiting for Teacher Mu to stage a moment to witness a miracle!
Ms. Mu did n’t let Xixi return to her position. At this moment, she really took out a long red plastic packaging rope and said with a smile: "Xi Xi, your teacher needs your help now. The teacher is busy. "
"Okay!" the little girl readily agreed.
Ms. Mu asked Xixi to fold the packaging rope in half and grabbed both ends in his hands.
"Now the teacher is going to cut it from the middle!" Teacher Mu asked Xixi to hold the packaging rope sideways, so that her scissors could be seen by other children as much as possible without facing Xixi.
However, Xi Xi saw Ming Shao's scissors making gestures between her two small 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 was really a moment to witness a miracle. Even the most skinny Wang Xijun couldn't take the noise into consideration at this moment and looked nervously at Teacher Mu's scissors.
The scissors clicked and cut the packing rope in Xi Xi ’s hand. Teacher Mu did not rush to speak, but first put the scissors, which are dangerous tools for children, away and lock them. Put colorful magnets and let Xixi count how many pieces of packing rope there are now.
In order to let other children see the counting results more intuitively, Teacher Mu also asked Xi Xi to count one and hand it to herself. She attached the packaging tape to the magnetic blackboard with a magnet.
"One, two, three ..." Xi Xi thought, but she wasn't counting alone, and the other children shouted excitedly.
As if they were expecting a miracle!
The last count to the fifth, Xi Xi ’s eyes, with a pleasant smile, spread his empty hands, and was surprised and happy to say: "No more!"
"Isn't it five segments?" Teacher Mu asked with a smile.
"It's five paragraphs! It's amazing!" Chen Shiyun was below, and could not wait to shout after several children.
Xi Xi also nodded, but she soon discovered something. The little girl pointed to the packing rope on the blackboard and said, "But, teacher, this rope and this one are too short!"
After folding, the cut from the middle is of course different lengths, some are very long, some are very short.
"It doesn't matter, because our question is, how can my mother cut into five segments, not the same length as five segments, so it can be cut into five segments with only one cut," Mr. Mu faced Zhu Xixi's observation ability is a bit of a headache and can only be explained in this way.
Why would it be a one-off, five-section?
Ms. Mu did n’t explain, but left a space for 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, can the research be cut into five with other cutting times?
......
In the afternoon, Yang Yi took Xixi back, and the little girl could not wait to tell her father what he learned today.
"This is great!" Yang Yi said with a smile, "Dad will study with you tonight, not just once or four times, there are many possibilities in between. And, let's see how to fold it together. It is possible to cut the rope into five pieces of the same length of rope with one knife as much as possible. "
"Okay, okay!" the little girl nodded longingly.
However, it was not just Yang Yi and Xi Xi who were studying the ropes at night, but Lan Xin also added.
Lanzhou Kai went to Wucheng County in Jinling City to buy land for Yang Yi. He had not been at home for a long time on a business trip. Yang Yi had to help guide Lan Xin's study!
Of course, the two little girls stayed together, playing and learning, and this interest became more intense.
"It only takes one knife to cut the watermelon, one knife at a time, because the watermelon is relatively large, but in the case of apples, you can cut it in half with one knife, put it in half, and then cut it into four with another knife ..." While instructing the two little girls to play with the folding rope, Murphy looked at him with a smile and holding Xiaoluo beside him.
"Sister, learn quickly, learn, and wait for my brother to grow up, you come to teach me, okay?" Murphy hugged Xiaoluo upright, so that he can rely on his arms Sitting in his arms, then shaking the little guy's little hand, said in the tone of Xiaoluo's character.
Xi Xi heard that, she lifted her small head and looked away from the rope in her hand to the younger brother.
"Giggle, that hemp, am I my brother's teacher?" The little girl smiled with joy and said with great interest.