Abacus mental arithmetic is actually not difficult at all.

To simply understand, it is a combination of traditional abacus and modern mental arithmetic, which is called "abacus mental arithmetic".

As the name suggests, traditional abacus calculation is usually performed on an abacus, and each calculation requires moving the beads.

As the saying goes, "The family of seven sons is separated by two rows, and everything goes through the same vicissitudes. All over the world, the calculation is done, and the three religions and nine flowing beads are busy." Looking at history, abacus itself is already a very advanced calculation method.

Compared with the traditional abacus, the characteristic of abacus mental arithmetic is that it needs to turn the "real calculation" in front of you into a "virtual calculation" in the mind. In the process of continuous learning and practice, it transitions from abacus to mental arithmetic, and finally reaches

You can completely get rid of the abacus and calculate the effects of ultra-complex data directly in your brain.

It's not an exaggeration to say it's a human computer.

Therefore, from this perspective, to say that abacus mental arithmetic is simple is actually not simple at all.

This seemingly popular but actually sophisticated concept was only formally proposed in the 1970s, and it took a period of promotion before it slowly became known to people.

It so happened that Mingdai was born. The time when she went to school was when the craze for abacus and mental arithmetic was in full swing. There were abacus and mental arithmetic cram schools all over the streets, and the beginning of modern chicken baby education was beginning to take shape.

It's a pity that she didn't have money to study when she was young, so she could only watch helplessly as her classmates discussed animatedly.

As a result, within a few years, abacus mental arithmetic was stopped because of the endless competitions and the trend in the industry was close to crazy.

For a while, Ming Dai also thought that the so-called abacus mental arithmetic, like the legendary "quantum reading", was a scam.

It wasn't until she went to Qingshan Middle School and found that two old teachers who were over 60 years old still insisted on teaching students to use abacus mental arithmetic, that she got a glimpse of the mystery and slowly started to study it.

There is no other reason, abacus mental arithmetic is really useful.

Once you become proficient, it will feel like bringing a calculator into the exam room, no matter how many digits you need to perform calculations.

In addition, since it is a virtual calculation in the mind, it requires the operator to be highly concentrated mentally and attentively during the calculation process.

In this way, the learning effect of abacus mental arithmetic is not limited to the improvement of calculation ability, but is also very effective in enhancing memory and reaction ability.

But the prerequisite is that you have something in your mind.

The former is just the basis of calculations, while the latter is the key to mental arithmetic.

Needless to say, Xiao Douding, she can't even do abacus. She spent the whole class learning how to move beads. She had to stop and think for a moment every time she played. Her expression was as serious as if she was considering some important national matter.

Kong Fang, on the other hand, was busy constructing a virtual disk in his mind.

This sounds very simple, but in practice it is not.

Just like when "abacus" is mentioned, most people will have a rough image in their minds. However, when it comes to the exact number of rows and rows of beads, it is estimated that it is difficult for anyone to build them all in one moment.

Kong Fang is currently in such a state.

Open the book "Ma Dongmei", close the book "Ma Shidong" =  =.

In addition, all the questions Mingdai gave him to practice were written in Arabic numerals, and his reflex arc became longer.

Two hours flew by.

The golden crow falls in the west, and the clouds dye it.

Kong Fang closed his eyes tightly, and kept rubbing the abacus with his hands. Drops of sweat fell from his forehead, and the virtual abacus in his mind finally took shape.

For a moment, he even felt that when he looked inside his Dantian, it seemed much clearer than before, and he suddenly felt relaxed and happy.

At the same time, Ming Dai's voice sounded in my ears.

"Okay, let's finish practicing today."

Kong Fang opened his eyes and realized that it seemed to be the end of get out of class time again. He asked, "Is it time to take a break at recess?"

"Recess has already passed." Mingdai said helplessly, "It's time for school to end now."

Although there is a math class in the afternoon, every forty-five minutes, Mingdai will give them about fifteen minutes of rest time to combine work and rest.

Xiao Douding was already used to this kind of class rhythm. Every time Mingdai called for get out of class to be over, she would stand up and move her hands and feet obediently.

But the new classmate Kong Fang is a curmudgeon.

He knew very well that his talent was not good, so he was extra diligent. When he usually practiced, he would sit for several hours at a time, and three quarters of an hour (forty-five minutes) was just a snap of his fingers.

Therefore, throughout the afternoon, he hardly stopped for a minute to rest, staring at the little Douding next door in a daze.

She thought she was the cub on Qingshan Mountain who loved to study the most, but she didn't expect that someone would be more obsessed with studying than her?

If this continues, can she still keep her position as "senior sister"?

Xiaodouding suddenly felt a strong crisis.

So she also immersed herself in studying.

——In the end, Ming Dai grabbed the collars and lifted them up.

Kong Fang was startled, "Elder Tang?"

Ming Dai said expressionlessly: "School is over and you are not allowed to study anymore."

Kong Fang:??

After being a student for so many years, this was the first time Kong Fang heard such a request. He was stunned for a moment and subconsciously said: "Ah, but I still have a little..."

Ming Dai: "There is no but."

She loosened Kong Fang's collar and said seriously: "Studying is the same as practicing. The most important thing is to accumulate it over time and not to rush for this moment. Sometimes if you rush for success, you will easily fall short."

"Elder Tang..."

Kong Fang was slightly startled, and just about to say something, Mingdai changed the subject, ignored him, and pointed her finger at the chicken in her other hand.

"Aruan too, have you forgotten what I told you before?"

"It's a good thing to love learning, but now you are growing up and you must pay attention to the balance between work and rest. If you continue like today, you will become myopic sooner or later."

Shortsighted!

Although Xiao Douding didn't know what "myopia" was, he knew it wasn't a good thing from Ming Dai's tone. He couldn't help but shrink his neck, and instantly the door returned to its usual appearance of a little sheep.

"Ah Ruan knows that he was wrong. Master, please don't be angry."

"Ah Ruan will never be like this again."

Seeing that she had a good attitude in admitting her mistake, Mingdai's tone became a little softer, "I'm not angry, just pay attention next time."

Little Douding nodded obediently.

Looking at her honest and serious look, she obviously listened to what Mingdai said just now.

Mingdai couldn't help but sigh: They are both little carrot heads, but they are much easier to teach than her fourth senior brother Xu Minyu.

Sure enough, the junior sister is the most fragrant.

She turned to Kong Fang and said, "Okay, it's getting late. You should go back quickly, otherwise it will be dark in a while."

Kong Fang had just learned some skills, and he actually wanted to practice for a while, but Mingdai said so, so he could only stand up and leave.

"Thank you very much for the elder's guidance today. This disciple has benefited a lot and I am very grateful."

Mingdai waved her hands disapprovingly.

It's easy to talk about, after all, you have paid the tuition fee, right?

"You can take this book of math problems and review it when you have time when you go back. But don't get too obsessed with it. Eat when you need to eat and sleep when you need to. The body is the capital of revolution."

Although Mingdai graduated from the modern examination, she has long suffered enough from the hardship of answering questions and has never advocated cramming teaching.

"Okay, Elder Tang."

"I told you not to call me Elder Tang."

…

When Mingdai was admonishing Xiao Douding, Kong Fang was listening nearby, and he could be considered to have listened to some of it.

But only a few.

In his opinion, the starting points of the inner door and the outer door are always different.

So although Kong Fang agreed well on the spot, he went down the mountain and sat on the crane, and then unconsciously recalled the formulas Mingdai taught him in the afternoon.

It’s not that he wants to take the test, he really can’t stop once he learns it!

The cranes in the left and right sects all knew the way, and there was no need for him to do anything during the half hour on the way back, so Kong Fang hesitated for a while, closed his eyes, and continued to meditate.

After practicing in the afternoon, he quickly entered the state this time, and before he knew it, he seemed to be in a mysterious realm.

The wind in my ears, the crane under my seat, the sound of breathing, even the aura wandering in the air...

All the subtleties suddenly became magnified. At that moment, he even felt that his cultivation, which he had not improved for a long time, seemed to be loosening!

But at this time, Kong Fang had no time to take care of this.

While he was mumbling words, the virtual disk in his mind crackled, and even his hands began to type blindly in the air unconsciously!

That posture and speed made two disciples who happened to be passing by not far away look stunned.

But unlike Kong Fang, the two men did not ride on a crane, but flew with swords, and had a blue cloth tied to their left arm.

He's from the patrol team.
To be continued...