About the fact that the heir of Huajian School is a girl

But since Li Qingcha opened the academy, the children's horizons have gradually broadened, and they are no longer ashamed to express their ideas and desires, resulting in all the students in the academy signing up.

Therefore, Li Qingcha had to conduct a selection.

She discussed the matter with Yuyun, Chi Weili and Fang Jingwu in the tent.

Fang Jingwu said: "As the saying goes, 'know yourself and know your enemy, and you can fight a hundred battles without danger'. We need to find out how the demon tribe's guard room usually calculates."

He turned to Yuyun who was standing beside him.

"How big a number would the accountant in the store room usually calculate?"

Yujun tilted her head in thought.

a long time,

"In March, 11,092 kilograms of silk, 20,800 pieces of cloth, and 3,423 ounces of silver were deposited into the warehouse..."

This was obviously memorized.

Fang Jingwu was surprised.

"so little?"

"Mr. Fang, you forgot that the Holy Kingdom does not produce silk, and the production of cloth is also very small. The main source of silver is... ahem... trade."

The fox girl wanted to say "robbery", but she was too embarrassed to say it out loud.

Fang Jingwu was embarrassed.

"Although it's not much, it's still a large number. Fortunately, it's very easy for students in the academy to solve this kind of problem now."

Li Qingcha said: "The most important thing is to know yourself and your enemy."

She asked Yuyun beside her,

"I think your room should all use abacus, right?"

Chapter 570 A Little Understanding

Abacus is a method of digital calculation using an abacus.

Li Qingcha asked Fang Jingwu,

"I remember we should have brought an abacus?"

Fang Jingwu understood what he meant, and after checking the account, he came back with an abacus and placed it on the table.

Afterwards, everyone looked at Yuyun.

The fox girl shrugged her ears helplessly and said, "I can use an abacus, but I can't compare to those gentlemen in the stall room. Don't expect me to be at the same level."

Li Qingcha didn't care.

"It's okay, just treat it as a test~"

"Then tell me."

"Let's compare the royal court's March income and expenditure accounts that you just memorized. You use the abacus and I'll use pen and paper."

Yujun nodded and wrote down six numbers on the paper.

That should be it.

Li Qingcha took out rice paper and pencil and started calculating with a pen, while Yujun started clacking on the abacus, her fingers flying in a dazzling manner.

It's a pity that after a fierce operation, the record is zero and five.

Snapped--

Li Qingcha put down his pen,

She had finished counting, while Yujun had only reached the fourth number.

Chi Weili nodded.

"Sure enough, it's faster to make tea."

Fang Jingwu also echoed.

Seeing their performance, Li Qingcha couldn't help but feel a little confused.

Shouldn't abacus be faster than pen arithmetic?

You know, even in modern banks, the three traditional business skills that are trained are still:

Counting money, abacus, and Wubi.

On the surface, a calculator or Excel is definitely better than an abacus, but the data has to be recorded manually, and there is a high possibility of making mistakes. Therefore, when it comes to addition, the abacus is still king.

The most common calculation done by an accountant is addition.

Li Qingcha pondered for a moment.

"Yujun, there is a saying called 'three times five divided by two', have you heard of it?"

Yujun rolled her eyes at her cutely.

"Of course I have."

"Then do you know where it came from?"

"This……"

The fox demon girl was really stumped by the question.

Even if it is a commonly accepted saying, there must be a reason for it and it cannot be based on conjecture.

Fang Jingwu, who was standing by, said, "Mr. Siwei is indeed well-educated. 'One up, one; two up, two; three down, five minus two; four down, five minus one'. This is the formula for the Seven Plates Clearance. Only a very few people can remember it."

Isn’t there a mnemonic for this?

Li Qingcha couldn't help but become even more confused.

"Brother Fang, why do only a very few people remember it?"

"The main reason is that they are not used. For the calculation of large numbers, the Ministry of Revenue can completely ask some low-level Confucian scholars or sorcerers to help. Generally speaking, the calculation speed is faster than Qipanqing."

"Hmm... I see."

In the past, when I read entertainment articles, there would be strange settings where the economy and technology were very developed, but the entertainment industry was lagging behind.

Typical powerful flying bricks, extremely simple and crude,

It seems impossible just thinking about it.

The real situation should be as Fang Jingwu said, there are internal reasons, such as the failure of abacus to develop because of the influence of monks, which led to no further progress after the seventh plate was cleared.

But this also made Li Qingcha feel relieved.

Abacus uses abacus beads to indicate numbers, which is visual and intuitive. The calculation is completed by arranging the beads on the abacus. The calculation process is clearly visible, making it easy for humans to recognize numbers, count, and understand the combination and decomposition of numbers.

As the saying goes, "One move and the beads are counted, and one stroke is enough".

With this obstacle, written arithmetic is definitely not good enough, because compared with abacus, written arithmetic has more segmented operations, and carry and borrow must be marked first, which is very troublesome.

Don't worry about it now.

Li Qingcha muttered: "Fortunately."

Yujun: ￣□￣｜｜

"What do you mean? Do you think I'm too slow?"

"No, really not."

"Humph!"

The fox demon girl raised her nose.

Click——

She pushed the abacus in front of Li Qingcha, and the beads made a crisp sound.

"Come if you can!"

At the same time, Chi Weili and Fang Jingwu also cast expectant glances, bling~bling~, enough to blind people's eyes.

Li Qingcha was speechless and prepared to decline.

Yujun has already asked the question.

"Three hundred and ninety-two divided by thirty-three."

As she spoke, she revealed a smug smile, as if there was a little child in her heart that was gradually swelling up.

For abacus, division is much more difficult than addition.

It’s impossible to calculate quickly!

This girl...

Li Qingcha looked at the fox demon girl, who looked like a little girl who had successfully played a prank, and helplessly adjusted the abacus, then said, "Eleven plus twenty-nine."

Yujun: ???

"How come you're so fast!?"

Li Qingcha said: "There are also formulas, such as... um... 'see one plus seven plus four', can you understand it?"

Yujun couldn't understand, but was greatly shocked.

She stared at Li Qingcha as if she was studying an alien.

Li Qingcha was a little embarrassed. He moved his chair back and said, "One plus seven equals eight. Add four to the next digit below eight. So, divide 12 by 100, and the quotient is eight, with a remainder of four."

Fang Jingwu was stunned.

"This formula... um... could it be that Mr. Siwei came up with it himself?"

So there is no way to fly back?

Li Qingcha coughed lightly and didn't dare to respond.

Fang Jingwu, however, took this action as a tacit agreement, nodded with some admiration, and said, "I really can't believe that Mr. Siwei has such a deep understanding of abacus."

hiss……

Li Qingcha's teeth hurt from the blows.

She just waved her hand.

"I understand a little bit."

Yujun and Chi Weili couldn't help but exchange glances.

(ˉ▽￣~) Cut~~

This guy got it done again.

Chi Weili was curious,

"Since abacus is not inferior to pen arithmetic, why did you agree to the bet with the Right King?"

Not only is there no disadvantage,

Abacus has obvious advantages over pen and paper arithmetic.

Li Qingcha said: "I was thinking about asking students to make some mechanical calculators before, but now it seems that it doesn't matter."

mechanical……

calculate……

device...

What kind of weird thing is this?

The other three were confused.

Li Qingcha waved his hand.

"It's just my wild idea. Although mechanical calculators are what you see is what you get, you only need to input numbers and operation symbols to get the answer, but they are too difficult to manufacture."

Fang Jingwu is very curious about new things.

"How strenuous?"