At this point, Liu Bei already had the ability to match numbers with digits.

"General Guan, Third General, why don't you two give it a try?" Li Mengxi suggested.

Li Mengxi is a good liar, and he is so good at telling lies that he tells the truth.

Guiguzi, what kind of person is that?

The knowledge that is comparable to Guigu must be great.

Guan and Zhang were very cautious.

"General Guan just writes, one hundred and eight hundred and twenty."

As soon as Li Mengxi came up, he gave Guan Yu a relatively large number.

Guan Yu was an invincible general on the battlefield, cutting off people's heads was like drinking cold water without blinking an eye.

But now, when he was asked to write a long string of numbers in a completely unfamiliar way, Guan Yu hesitated.

With his eyebrows lowered and his brows slightly furrowed, Guan Yu twirled his beard and held the pen in his hand, maintaining the same posture for a long time without moving.

Then, Guan Yu moved, raised his hand, clasped his fingers, and muttered something in a low voice.

"One, ten, one hundred, one thousand, ten thousand, one hundred thousand. Six."

When the numbers were calculated, Guan Yu wrote down,

The tens of thousands digit is empty, the thousands digit is empty, and the ones digit is also empty. This is absolutely correct.

"Third General, do you want to try too?" Li Mengxi looked up at Zhang Fei who was eager to try, and asked with a smile.

Zhang Fei has long wanted to try it.

Wait for Zhang Fei to get the pen.

"Three million seven thousand two hundred and fifty-six."

Li Mengxi increased the number a lot.

The boss Zhang Feiniu stared at was different from ordinary people. The deeper they thought, the more their brows tightened.

Zhang Fei would stare when he was angry, and he would stare when he was thinking. The harder he opened his eyes, the harder he opened them, and the wider he opened them, until his eyeballs almost popped out.

After he figured it out, Zhang Fei held the pen in his right hand, stretched out his index finger with the thick bamboo-like fingers of his left hand, held down the paper, and wrote words one by one.

"Three million." Zhang Fei muttered and wrote three.

Then, he pointed his finger back and saw that one million was zero.

Zhang Fei took a writing brush that was extremely slender compared to his huge palm, followed San, and made a circle.

This is zero, and the hundred thousand bit is empty.

Zhang Fei pointed back with his finger, counting the digits and writing at the same time.

The ten thousand position is also empty.

Three million seven thousand two hundred and fifty-six, the thousandth place is seven, Zhang Fei glanced at the top of the page, the numbers were written in a weird way, Zhang Fei was not very proficient.

Then, Zhang Fei slowly finished writing such a large number.

After finishing writing, Zhang Fei checked it again, "Haha! Did I, Mr. Zhang, write it correctly?"

Zhang Fei had a bright smile on his face, as if he had accomplished something extraordinary.

Li Mengxi silently counted the numbers written by Zhang Fei, and they were all correct.

After all, Liu, Guan, and Zhang are adults. They also know how to count and have strong receptive abilities, so it is normal for them to master number counting in a short period of time.

Compared with Chinese characters, the numerical counting method is much simpler and faster.

But if that's all it is, it's obviously not worthy of the gimmick of Gui Gu Shen Shu.

Therefore, Li Mengxi thought about teaching the calculation method to three people.

Addition, subtraction, multiplication and division are sufficient.

After thinking about it, Li Mengxi asked, "Should the three of you know the multiplication method?"

Li Mengxi was curious. The multiplication table existed in the Spring and Autumn Period and the Warring States Period.

Liu, Guan, and Zhang all have received a certain degree of education and should be able to know the multiplication table.

As expected, all three can.

Liu Bei even recited it to Li Mengxi.

The difference is that the multiplication table Li Mengxi learned when he was a child is that one to one equals one and one to two equals two.

What Liu Bei memorized was, one one is enough for one, one two is enough for two, and there are subtle differences in description.

Seventy-eight equals fifty-six, which means the same as seventy-eight equals fifty-six.

Since Liu, Guan, and Zhang knew the nine-nine table, which is very important for multiplication calculations, there would be no problem.

"Three digits are a common number. Next, I will teach three digits a quick calculation method."

"There's not enough pen and paper, three generals..." Before Li Mengxi finished speaking, Zhang Fei immediately went to get pen and paper again.

In order to learn Guigu's arithmetic well, Zhang Fei came with a large stack of rough paper.

The quality of the paper is really not very good. It is hard, thick, and crispy, and it will fall apart when you hold it.

There were four pens and one inkstone. Liu, Guan, Zhang, and Li Mengxi were each assigned a piece of paper.

"How about someone come up with a question and we'll calculate it together to see who can calculate the result first?" Li Mengxi invited Liu, Guan, and Zhang to challenge.

Liu, Guan, and Zhang looked at each other and agreed with a smile.

The candlestick in the middle of the stone table was blown by the breeze, and the candlelight rippled slightly.

Li Mengxi thought a little. For simple calculations of addition, subtraction, multiplication and division, the difficulty lies in the complexity. The larger the number, the more complicated it is, and the more difficult the calculation is.

Next, there are the calculation steps.

Multi-step calculation is more difficult than single-step calculation.

Therefore, Li Mengxi designed a complex calculation problem that combined the four operations of addition, subtraction, and multiplication.

"The title is, three-person listening question.

“Today we have 999,999 soldiers, 128,400 casualties in the first battle, and 537,621 new soldiers.

Ask, how many soldiers are there at this time?

Let me ask again, if a person is rewarded with 18,450 grains of rice, how many grains of rice are needed in total?

Let me ask you again, if the whole army is composed of 1,730 men, how many troops will there be in total and how many men will be left?"

This problem is extremely abnormal. The abnormality lies not in the difficulty but in the complicated stacking of numbers.

After Li Mengxi finished asking the question, Liu, Guan, and Zhang didn't move, they all raised their heads and looked at Li Mengxi silently.

This... After asking the question, the three of them were stunned because they didn't remember the question.

Li Mengxi looked at Liu, Guan, and Zhang, who were motionless and staring at him. The three of them seemed to be hesitant to speak. Li Mengxi suddenly understood what the problem was.

Leaving aside Liu Guanzhang, Li Mengxi finished asking the question and realized that he couldn't remember what the messy numbers he just mentioned were.

Helpless, Li Mengxi had to write the title by hand.

I wrote the first copy and copied it three times, for a total of four copies.

The "test papers" were distributed to everyone, and Li Mengxi chuckled, "Start!"

Give an order.

Li Mengxi picked up the paper and started calculating with his pen.

I don’t know how Liu Guanzhang calculated with his hands. Anyway, Li Mengxi calculated in vertical form.

That is, if there is not enough to subtract, borrow one, add one to add ten, and add one if the product reaches ten.

In this way, Li Mengxi took the vertical position first, and calculated that he had 999,999 soldiers, 128,400 casualties in the first battle, and 537,620 new recruits.

one person.

The calculated number of people is, people.

The second question is to ask how many grains of rice a person needs if there are 18,450 grains of decimeter.

This is multiplication.

In vertical form, we can also calculate,.

That is, more than 26 billion.

The third question is, if one thousand, seven hundred and thirty people are made into one unit, how many units can be divided into and how many people are left?

This is division.

In addition, it can be divided into parts.

Yu, 1203 people.

Li Mengxi finished the calculations quickly. The writing brush was not very easy to use. The pen was soft and had a thick tip. He arranged the calculations vertically. He did not calculate two lines and there was no room on the paper.

This made Li Mengxi miss pencils. Writing with a hard pen is much easier than a brush.

Because the number was relatively large, Li Mengxi was afraid of making a mistake, so he recalculated both sides, "Okay, I've done it."

Li Mengxi threw away his pen and said.

Liu, Guan, and Zhang, who were immersed in calculations, all stopped writing and looked up at Li Mengxi.
Chapter completed!