Amid the crackling sound, Liu Caiyun was planning to show "student" Yuchi Mingyue what "abacus" is. She saw her fingers plucking around the abacus, and the abacus beads slid up and down. The abacus beads hit one after another sounded very pleasant.

Yuchi Mingyue looked at Liu Caiyun's plan, then looked at the abacus in front of him, and tried to dial it a few times, but she felt it was very difficult.

When she was still at her parents' home, she would sometimes see her mother asking her to take charge of the account, but she didn't use this "abbreviation" at all. The other party used small wooden sticks, which had a name called "abbreviation".

In charge of the business, he used calculations to calculate the numbers and placed many bamboo calculations on the ground, constantly changing various patterns. In Yuchi Mingyue's opinion, it was quite interesting.

Gradually, Yuchi Mingyue knew that everyone used calculation chips to abacus, and few people used abacus. Now, after Liu Caiyun introduced her, she knew that only in Huangzhou, the "abacus" used as a calculation tool was used as a calculation tool, and overwhelmed the "abacus" of using calculation chips to abacus as a calculation tool.

Yuchi Mingyue doesn't know how to calculate numbers, so she doesn't understand the calculation, let alone the calculation, but she thinks that the calculation will be better, and the reason is very simple: quiet.

To calculate the numbers, you just need to fiddle with the numbers on the table or on the ground. There is no sound. When using the calculations, the crackling sound is pleasant at the beginning, but it will make people feel upset after listening for a long time.

As both calculation tools, you only need to pack a calculation bag and hang it on your belt. There is no sound when you walk, and it is not that convenient to carry the abacus with you, and it is not very convenient to move.

Therefore, Yuchi Mingyue was very puzzled by her sister's advice to learn abacus. First of all, she felt that she was proficient in abacus when checking accounts, and the person who planned the calculations could check it. She didn't need to know how to calculate.

This principle is like eating. She just needs to wait for the maid to serve the food and does not need to cook in person. Cooking is a matter of the kitchen, and settlement of the accounts is similar.

However, my sister "ordered" her to be proficient in arithmetic so as not to check the accounts. She was fooled during reconciliation, and her sister herself settled the accounts from time to time as a means of random checking, so Yuchi Mingyue could only obey.

Now, she has no good feelings for abacus because it is too noisy.

He had a conflict in his heart and naturally couldn't learn it. When Liu Caiyun saw Yuchi Mingyue's face, he stopped planning and began to enlighten the other party.

Using calculation of numbers is called "operation", which is the operation in the idiom "strategy". The calculation has a long history, and most people in the world who know how to calculate numbers can "operate", while in comparison, fewer people use abacus.

So, why did Huangzhou begin to vigorously promote abacus? The reason is simple and efficient.

Whether you plan or abacus, you have to memorize the formulas and songs. From this point of view, there is no difference between the two algorithms, but when a large number of calculations or the calculated numbers are large, using an abacus to calculate the numbers is faster than using a calculation to calculate the numbers.

It takes time to place calculation sheets, but it takes time to dial abacus beads to be not worth mentioning in comparison.

When the calculation volume is small, this problem is not obvious. If it is a large amount of calculation, it will take a lot of time to set up the calculation sheet.

When the calculation number is large, the area required for calculating the chip is also large; when the calculation speed is to be accelerated, it is easy to cause calculation errors due to incorrect fiddling with the chip.

This problem does not exist when using abacus to perform abacus.

A person who is proficient in calculations and a person who is proficient in abacus plays arithmetic. If the number to be calculated is very large and many, then the person who first calculates the result must be the one who uses abacus to calculate the number.

Abacus is very suitable for practical business calculations, so it is natural for Huangzhou, where commerce is booming.

To be proficient in abacus, you must memorize the abacus formulas and songs. However, because planning is very popular and abacus is not valued by people, practical abacus formulas have few and complicated songs, so multiplication and division are more troublesome.

The abacus that Huangzhou has begun to promote now has been practiced and pondered by many people, and asked scholars who are proficient in arithmetic to help improve it. It took several years to extract practical and concise calculation formulas.

After memorizing these four operations, adding, subtracting, multiplication, and division, it is always unfavorable to use abacus to calculate the numbers.

Liu Caiyun took out a thick book titled "New Abacus Algorithm and Meditations". The book introduces the four formulas of operations in a comprehensive picture and text, which is the textbook of the abacus promotion training class in Xiyang City.

Yuchi Mingyue took the book and flipped through it. Looking at the dense texts, and then looking at the schematic diagrams, she felt that abacus was difficult to learn.

"The so-called everything is difficult at the beginning. I look at the textbooks and plan. I think that in less than half a month, Cuiheyuan will be able to get started with abacus."

"Sister Liu, how long does it take to learn how to abacus?"

"In terms of the training class, those illiterate students, as long as they are not elm-headed and study hard, they can graduate in three months."

Fearing that Yuchi Mingyue would be afraid of difficulties, Liu Caiyun said again: "Actually, this is the problem of practice making perfect. If you use abacus every day, you will not forget the mantra."

Seeing that the other party began to read books seriously and moved the abacus from time to time, Liu Caiyun drank a cup of tea to moisten his throat. Looking at the abacus in front of him, he felt a little dazed.

Because abacus is not very popular, abacus is not common. The abacus she has seen before, the inner division of the upper, middle, and lower layers, addition, subtraction, multiplication and division are all calculated on these three layers. The formulas for multiplication and division are complicated and inconvenient to use.

This kind of abacus is more a counting tool than a calculation tool.

Now, the improved abacus is divided into two layers, with horizontal plates in the middle, two subdivided by a horizontal plate, two subdivisions on the upper layer, five subdivisions on the lower layer, and refined formulas for addition, subtraction, multiplication and division, which is very convenient to use.

The shape of this abacus was proposed by King Xiyang, and the four abacus mantras are those that countless accountants, shopkeepers, merchants and scholars have figured out and optimized.

A small abacus embodies the hard work of countless people, and the changes in abacus are a microcosm of the changes in Huangzhou. Ten years have really made people feel like they have changed.

Ten years have passed, and when she thinks about the past, Liu Caiyun is quite sighing. Looking at the young Yuchi Mingyue in front of her, she finally realized that she was "age".

The King of Xiyang was still the Duke of Xiyang County. When the whole family lived in Anlu, Yuchi Mingyue was a regular visitor in the mansion and often went to the Duke of Xiyang County to play.

At that time, Liu Caiyun and Zhang Dingfa also lived in Xiyang County Duke's Mansion, so she was very familiar with Yuchi Mingyue. The young girl back then has returned to the mansion again, but now the Duke's Mansion has become the royal mansion, and the little girl has become the "Cuiheyuan" and the side room of her brother-in-law.

Both sisters are beautiful and charming. Now they serve one husband together. Who would have thought of that time?
Chapter completed!