"Let's talk about basic mathematics today, have you learned the ninety-nine multiplication table?"

Early in the morning, after changing the medicine, Zhao Jun began to teach.

Now everyone's timetable has changed.

In the past, about four o'clock in the morning, Zhao Jun got up, Yan Shu came over to deliver some food, and then Zhao Zhen and them came over to see it for a while before going to the court.

After waiting for the dynasty, I came back to listen to Zhao Jun and Yan Shu's chat, and got a glimpse of the historical truth from the chat.

And at that time, Zhao Jun and Yan Shu didn't dare to communicate too deeply, so the information obtained was also scattered, and they had to rely on Yan Shu to classify and summarize every day to have a clue, so there was not much information obtained.

Now after the construction of Nini Village, Zhao Jun has ten students, and after the first class of the universe class, he will start formal teaching today, taking a math class.

In this way, Zhao Zhen and the others can go to the court first, and after dealing with the affairs of the court, when Zhao Jun finishes his lecture, Yan Shu pulls him outside to bask in the sun, and the ministers of the Great Song Dynasty can pretend to be the old, weak, sick and disabled who came out to bask in the sun, and chat with him in the village.

However, now everyone is used to gathering in the back garden first, taking a look at Zhao Jun's situation and then going to the early dynasty together, so when Zhao Jun started teaching, there were already dense figures standing outside the door.

Everybody is watching.

Zhao Jun fumbled with the small wooden board, holding the charcoal given by Yan Shu in his hand, and asked everyone if they had learned the multiplication table.

Primary school mathematics is nothing more than addition, subtraction, multiplication and division, and he will not be exposed to negative numbers until about the sixth grade, and he is worried that the children here will not learn at the same pace, so he asks this, in fact, he is not teaching, but finding out.

I heard the crisp child elongating the children's voice below: "No~~~ Yes." ”

"Okay."

Zhao Jun didn't expect the children's foundation to be so poor, they haven't even started to learn multiplication, I don't know what the previous volunteer teacher did, did they only teach addition and subtraction?

"Then let's learn addition and subtraction today."

He fumbled on the board, wrote one plus one with charcoal, then pointed to it and said, "Who knows how much one plus one is." ”

"Two!"

The children shouted.

It seems that addition and subtraction are still a bit basic.

Zhao Jun thought to himself.

"Does anyone know what three plus seven is?"

He asked again.

No one was quick to give an answer, and the children snapped their fingers, and after a while, someone said, "Ten!" ”

Doesn't round the algorithm.

Zhao Jun probably knew the level of the children, so he wrote on the blackboard a few number sequences such as one plus nine, two plus eight, three plus seven, four plus six, five plus five, etc., and said to everyone: "Then let's learn rounding algorithm today......

In daily life, addition and subtraction are generally only used for less than five digits, and more often use calculators, and even many people use calculators directly for more than two digits.

However, primary school mathematics should still be taught, and the so-called rounding algorithm is naturally a calculation method that can round up the single digit first.

Zhao Jun wrote 1+6+9 on the blackboard and told everyone how to calculate this number sequence.

To put it simply, 1+9 is equal to 10, and then 6 is equal to 16.

However, even with such simple arithmetic, the children still learned it in a fog and stumbled for a while.

After that, Zhao Jun taught several others, and he was busy with a class, which made his blood pressure almost go up.

There are two difficulties that are being encountered.

One is that the children's ability is high and low, and the speed of understanding is fast and slow, and he has to take care of those slow children and teach them over and over again.

The second is that he is a blind man, and he writes by groping and writing, and sometimes he often makes mistakes, and he has to erase and rewrite, so he often gets a knowledge point, and he has to spend several minutes to get it done, and he is physically and mentally exhausted.

No wonder it is said that teachers who teach mathematics are prone to hair loss, but fortunately they are Chinese teachers.

After class, Zhao Jun lay on the bed to rest, happy in his heart.

This time, he was assigned to Daliangshan to teach, because the previous group of teachers left, and the next group of teachers had not yet come, so the organization asked him to go to an outpost first, arrange the students, and then send new teachers in batches.

Volunteer teaching is like this, there is no fixed teacher, and there are even many teachers who are excited when they first come, but they complain about it within a few days, and then give up halfway and run away secretly.

If it weren't for the two-year quota for teaching, the organization would give a lot of preferential treatment after the examination and the future examination was successful, and Zhao Jun didn't want to suffer this hardship.

Now the whole school is just one teacher, and he is blind, and this teaching task is very difficult.

For the time being, I can only teach each subject slowly, hoping that the road up the mountain will be opened as soon as possible, and I can go down the mountain to the hospital for treatment as soon as possible, and the new teacher will also arrive as soon as possible, so I can share the pressure on myself.

Zhao Jun thought to himself.

And just when he had just finished a class, Zhao Zhen and the others also turned around and walked towards the front palace.

At this time, it had been about ten minutes past the previous dynasty.

In the past, they would actually be late, but today they originally planned not to be late, and they would go to the court immediately after taking a look at Zhao Jun's door, but this time they listened to a class and delayed the time of the court.

But everyone didn't care, the sky was still dark, and a faint gray glow appeared in the east outside the distant city wall.

On the compound road outside the Qingshou Palace, the outer guards were surrounded, and then the eunuch palace maid carried a lantern to open the way.

Zhao Zhen and several prime ministers did not sit in a sedan chair, so they walked like this.

He said as he walked: "Zhao Jun once said that the strength of the country in later generations depends on the power of science and technology, and this mathematics is the foundation of science and technology. ”

"Official, the minister thinks that the mathematics taught by Zhao Jun today is probably only a very small part of it, otherwise, since Qin and Han have books, then why don't Qin and Han have technology? Obviously, like the water in the ocean, simple arithmetic is just one drop. ”

Lu Yijian tirelessly persuaded.

"It makes sense."

Zhao Zhen listened very persuasively.

Wang Zeng also said: "The minister thinks that the ingenuity is not the simplicity of arithmetic, but its way. For example, the arithmetic of later generations is no longer a lowercase number, but a large food character, is this conducive to writing? Perhaps this is the reason why the word "big food" prevailed in later generations. ”

"Hmm......"

Zhao Zhen nodded with a deep sigh: "What does Wang Xiang mean, to promote the whole country?" ”

"It's really good for writing, but a few of the numbers are good for alteration, which is a hidden danger, so don't rush it, let's take a look first."

Wang Zeng said: "The minister thinks that it has another wonderful point, that is, to exercise people's thinking ability, and use the method of making up the whole method to quickly get the answer to arithmetic, who can think of this?" ”

"This should be the mathematical logical thinking that Zhao Jun just said."

Song Shou said: "Mathematics can exercise people's brain power and increase intelligence, and perhaps it is because of learning mathematics that other science and technology can be studied." ”

"yes."

Wang Sui said: "We are getting older and older, and our brains can't turn around. Or are these young people thinking about things, and maybe we can ask Zhao Jun for a lesson in this mathematical way. ”

The group quickly arrived at the Vertical Arch Hall along the Fu Road, preparing for today's early court.