"Ten, nine, eight, seven!"

“...... Three, two, one!"

With the sound of countdown, the craftsmen ran in one direction with a bang, and when they counted to one, all the people arrived, and no one was missing.

The distance is so close, and ten breaths are actually abundant. After the day before yesterday, everyone was wary of this hand, and the craftsman chose their leisure time, and they acted immediately when they heard the password, and they were all very punctual.

"Not bad. "Huang Jiangguan is very satisfied.

There were a few more boxes beside him, the lids of which were closed so that he couldn't see the contents clearly.

The service badge in the box has been handed out to each of them, but what is in this box?

The Huang Jiangguan did not speak immediately, but asked the steward of the post station next to him to organize these craftsmen, and let them line up in a neat line and sit down in the open space next to the post station.

Next to the open space is the stable, where you can hear the restless sound of the horses and smell the stench of horse manure.

Of course, no one who will be sitting here today cares about this little thing.

This row after row is a bit like a classroom......

Xu Wen sat in the middle of the team and looked around, suddenly thinking.

The yellowsmith reappeared at the front of the line, the lid of the box already open.

Inside are charcoal pens and wooden boards, which are familiar to both new and experienced craftsmen. When they or their masters are working, they often use such things to draw some patterns and make some marks, and when they are finished, they can continue to use it after they have planed the surface, which is very convenient.

Charcoal and wooden boards were distributed to everyone, and Xu Wen felt more and more like a class.

"Today we are playing this game in a different way. First, I'm going to teach you some algorithms, and then you're going to apply those algorithms and give me the final numbers. There are a total of 10 questions, and if more than 6 questions are correct, all of them can get one point. The 30 fastest of them will get an extra three points. Huang Jiangguan's gaze swept over the crowd and said solemnly.

All craftsmen have come into contact with numbers, a few feet, a few feet, and a few inches, and everyone basically knows it.

But that's how their level is, I've never heard of the calculation algorithm or something, and most people are confused.

Only a few people in the crowd nodded silently and understood the words of the Huang Jiangguan.

The most speechless of them is Xu Qian.

Things turned out to be the same as he thought, this was in class, and it was still a math class.

No, according to the general level of ancient craftsmen, it is not yet mathematics, at most arithmetic.

"I'll teach you the equation first, you try to do the math, and finally assign the problem at once. ”

Sure enough, Huang Jiangguan quickly taught them the first equation, which was very simple, that is, the addition of two digits.

This is something that students in the first grade of elementary school have to learn, and today's children are educated early, maybe in preschool.

But at this time it was completely different, only a few people could figure it out quickly, and most of the craftsmen, including a considerable number of the elderly, were wrenching their fingers, or had found some other way to figure it out.

Of course, this question is simple after all, and most people can still calculate it, but it takes a long time.

If all the following questions are like this, this point can still be obtained, and at most it will only miss three points.

Xu asked for an answer in a second, and wrote the numbers on the wooden board.

He looked at the craftsman in front of him, a little curious.

The make-up class in the evening may seem difficult, but it is undoubtedly a great thing for these craftsmen who have not received systematic education.

The point is, why did the craftsman, or the government, do this?

This is not the style of painting of this era at all......

What exactly does the imperial court want to do?

It took a long time to finish the first question, and Huang Jiangguan was not in a hurry, so he waited for everyone to put their pens before starting the second question.

The second question is still addition, which is an application problem, how much is one zhang three feet seven inches plus six feet four points?

This is equivalent to the addition of three and two digits, which is theoretically a little more difficult than the previous problem, but probably because it takes the form of an application problem, most people calculate a little faster than the previous one.

The third question is the addition of three-digit numbers and three-digit numbers, and the fourth to sixth questions are all subtraction, which are also two-digit and two-digit numbers, three-digit numbers and two-digit numbers, and three-digit numbers and three-digit numbers.

At this stage of arithmetic, the results are, of course, all positive, and negative numbers are impossible.

Xu Wen still wrote down the answer for a second, and then raised his head to look at Huang Jiangguan, a little curious.

The first three questions are addition, the last three are subtraction, and what about the seventh question start?

According to this law, it should be multiplication?

Multiplication is much more difficult than addition and subtraction, and he remembers that when he started learning multiplication when he was a child, the teacher taught the ninety-nine multiplication table first.

How will the yellow craftsman be taught in this era?

"Questions 7 to 10 use the same equation, to be more precise, this is not an equation, it is the conclusion of the algorithm. Now I need you to memorize these conclusions, and in the final exam questions, I will draw four of them to check whether you are familiar with them. ”

Huang Jiangguan first introduced it, and then began to backslide, "Ninety-nine eighty-one......

Ninety-nine-eighty-one, ninety-eighty-two, ninety-seventy-sixt......

From here, Huang Jiangguan memorized all the ninety-nine multiplication tables.

is different from what Xu Wen learned before, at that time, it was from the beginning, one by one to get one, one to two to get two, and finally memorized until ninety-nine eighty-one.

And what the Huangjiang official taught was to start from nine, go all the way forward, and finally be the same.

Xu Wen followed along with the back, while remembering the information he had read a long time ago.

The ninety-nine multiplication table was not invented by modern people, it existed as early as the Spring and Autumn Period and the Warring States Period, and it was the basic calculation plan for ancient calculations, and it has existed for more than 2,000 years now.

Different from modern times, it starts from "ninety-nine-eighty-one" and ends with "one as one". Since the first two words are "ninety-nine", it was named ninety-nine multiplication table, and it has not been changed to this day.

Of course, Xu Wen is very easy to memorize, he has taught Xu San, and it is not difficult for Xu San to memorize. Jiang Wangfeng received a very orthodox high-end craftsman education, in which the multiplication table is a very important and practical part.

In this era, there are many things that no one knows, but too few people do. Education is too unpopular and unsystematic.

In addition to the three of them, there are a few of the three hundred craftsmen who know how to do it, but on the whole there are very few. After the Huang Jiangguan finished teaching, a bunch of people on the field were reciting the words with a sad face.

At this moment, Xu Wen seemed to have returned to the previous class, the teacher assigned the homework and was about to be memorized, and a group of people were cramming for a while.

This feels quite nostalgic, but Xu Wen is still very strange.

Now it seems that the imperial court is trying to quickly train a group of people and let them do something.

What could it be? Something to do with this service in the Western Desert?