In terms of archery, Wang Sunqi watched Wuxian shoot a few pots of arrows, and after the arrow hit the bull's-eye, he said that his skills were not as good as others, and asked the gentleman to learn by himself.

He also taught him earnestly: "However, archery does not mean the way of the arrow, the heart is right, the arrow is right, the heart of a gentleman is like a stone, and it is as straight as an arrow." ”

Although he didn't understand it very well, he looked very powerful, and Zhao Wuxian had to be the only one.

……

The teacher of books and mathematics is the chief accountant of the lower palace, named Ji Qiao. "Ji" is a position that has been passed down from generation to generation in their family, and it has gradually become a clan name, and the accountant is specifically responsible for auditing various accounts, which is later called the master book, which is equivalent to financial accounting.

Zhao Wuxian remembered that there was also an economist Ji Ran who inherited Guan Zhongzhi's learning in this era, and he should not have been used by Goujian, the king of Yue, who had just succeeded to the throne, and he didn't know where he was.

In addition, Ji Qiao's hand-held Jin State seal characters are also quite beautiful, but many words Zhao Wuxian can't recognize, and the strokes of the seal script are much more complicated than the official scripts that have not yet been produced.

Moreover, Zhao Wuxian discovered another thing, at this time the brush has been widely used, so what brush was invented by Qin Mengtian plucking wolf hair and rabbit hair, it is purely a brain supplement for later generations.

On this day, after Ji Qiao reviewed the seal characters written on the bamboo pieces and slips without shirts, his short bearded cheeks suddenly twitched slightly.

Because it's so miserable! What the hell is a lump of things? It's also strange that in his previous life, his parents paid him to go to the calligraphy class, so he almost fell into a zero-based battle, and the words he wrote were often mixed with strange things...... For example, the simplified Chinese characters of later generations.

So Wuxian was stared at by Ji Qiao every day to practice Jin Seal, copying "Poems" and "Shangshu". It was not easy to write on bamboo slips, and from time to time he had to scrape off and rewrite with copper sharpening, which was surprisingly slow, and this painful experience also prompted him to consider whether he should find an opportunity to invent paper.

And with paper, at least you can get rid of the terrible toilet chips when you go to the toilet, and some toilet chips are still public...... The ancient life of this pit daddy.

When practicing calligraphy, Wuxian was abused by Ji Qiao like a primary school dog who was punished for copying Chinese textbooks in his previous life, but when it came time to learn measurement and arithmetic, the situation was reversed, and he could finally raise his eyebrows!

"Sir, it's not that the kid is lazy, it's that this trick is too slow and troublesome, and it's not very useful."

Ji Qiao is outstanding in arithmetic, and he is famous in the Zhao family's palace at a young age, Zhao Wuxian said that he was not willing to learn, of course he was not happy.

"Mathematics is one of the six arts of the gentleman, the only magic weapon to settle down, in the future, when the little gentleman arrives in the fiefdom, if he doesn't even know the taxes and calculations, it is difficult to guarantee that he will not be deceived by the soap and the big family. Even if you are a brigade commander in the army, if you don't know how to do arithmetic, you can't measure the height of mountain slopes, you can't measure the depth of rivers, you don't know how to coordinate heavy corn, and you can't manage the number of divisions and brigades! ”

The Spring and Autumn mathematician was simply heartbroken.

This era is not as good as later generations, mathematics has a very important position, and it is not a sideshow, otherwise it will not be listed as one of the six arts of a gentleman.

The mathematics of the pre-Qin and Han dynasties are mainly divided into nine types: Fangtian, Corn, Decay, Shaoguang, Shanggong, Average Loss, Deficit Profit, Equation, and Pythagorean, many of which are extremely practical. However, Ji Qiao was also very interested in the pure arithmetic of metaphysics, and even became an arithmetic idiot, and he was obsessed with the study of arithmetic, and often did not eat or drink to study difficult problems.

"Sir, the kid knows that mathematics is very important, people stand in the world, and their actions, sitting, sleeping, eating, and sleeping are really inseparable from this knowledge, and even, it is much more useful than those mundane rituals, but this is ......."

Zhao Wuxian looked at the calculations that were densely packed on the table, and his dense phobia suddenly attacked, and he was a little dizzy......

The arithmetic chips are actually small sticks of the same length and thickness, mostly made of bamboo, but also made of wood, animal bones, ivory, metal and other materials. About 270 pieces were in a bunch, placed in a cloth bag, tied around Ji Qiao's waist and carried with him. When it is time to count and calculate, take them out and place them on the table or on the floor to fiddle with.

For calculations, the larger the number calculated, the larger the area of calculation, and when the large numbers are multiplied, it is not uncommon for people with poor levels to spread out a room with a stick. Ji Qiao is obviously a master of calculation, he divided the numbers into groups for calculation, his eyes and hands are fast and his memory is superb, so he set up an arithmetic array on half of the table.

Zhao Wuxian asked himself if he couldn't do it, but he also had his own tricks.

A lot of his knowledge in his previous life has been returned to the teacher, and the high math in college was even more of a mess, but he can't play complex things such as calculus, and the foundation of junior high and high school is still there, and he can take it out to fool people.

What, you're saying that you can pretend to be forced with an elementary school multiplication table? However, I'm sorry, Zhao Wuxian is sad...... It should be a gratifying discovery that this thing has been formed since the Western Zhou Dynasty.

Although, in reverse order with later generations, the multiplication table of Ji Qiaojiao starts from "nine hundred and eighty-one" and ends with "two halves for one".

In addition, in the ancient arithmetic scriptures of the Zhou people, the Pythagorean theorem has also been discovered, and there is also a great power who did not leave a name to list the formula of the daily high......

"The little gentleman's words are a little ridiculous, no need to calculate, how to calculate? It's like crossing a river without a boat, and fighting at close quarters without fighting. "Ji Qiao has a headache, it is rumored that this little gentleman behaves perversely, and it is difficult to discipline without etiquette, and it is true.

"The boy knows a method, which is very different from the method of calculating with the chip, and the gentleman can come up with a problem for me to demonstrate."

Ji Qiao decided that he had to surrender this gentleman who was full of cranky thoughts.

"Okay, then I'll test the little gentleman, so that you know that the breadth and profundity of mathematics is not something that can be dealt with at will."

Ji Qiao was very dissatisfied with the unsympathetic remarks in his heart, and he simply came up with a difficult topic.

"Today, there are savages who rent the land of a gentleman, and they get one dollar per mu in the first year of renting, one dollar for every four acres next year, and one dollar for every five acres in the year after, for a total of one hundred yuan for three years, and ask how much land is rented?"

This is exactly what he demonstrated with the calculation chip just now, with his ability, he still fiddled on the table for a long time, Zhao Wuxian didn't listen attentively just now, and he must not be able to answer.

Zhao Wuxian smiled slightly, and sure enough, he didn't take the calculation, but picked up a thin bamboo stick and wrote and drew on the sand table in the room.

It can be a bit tricky to use the chips, but the Arabic numerals and the four rules are much simpler.

Ji Qiao was surprised to find that Zhao Wuxian really didn't need to calculate with a chip, and although he had never seen the vertical type listed on the ground, he found it extremely simple and reasonable based on his years of arithmetic experience.

And those strange symbols that twist and turn vertically, 0123 and the like, he has never heard of, besides, what does that "one" mean? What about "ten"? What the hell is this diagonally down-down cross?

The idiot Ji Qiao scratched his ears and cheeks, and he was fascinated, but before he could figure out some ways, Zhao Wuxian actually divided five by two, and solved the problem!

Although the vertical method used by Zhao Wuxian was only the most basic algorithm in the primary school curriculum in the 21st century, it was definitely an advanced scientific method that was ahead of its time in the Spring and Autumn period of the 5th century BC.

After finishing the matter, he clapped his hands lightly and said, "Sir, the kid knows the answer, a total of 27 acres are rented, and 31 of 47 acres are rented." ”

Ask for collections, ask for recommendations......