Ren Yi said: "Ah Xu, Ah Gui, do you know why I want to leave you two alone?" ”

Liu Gui and Huang Xu glanced at each other and shook their heads blankly.

Ren Yi said: "You are my brothers and sisters Ren Zijian. During these periods, you have managed the money and food in the house in an orderly manner. ”

"And you two have honest temperaments, and you are the best candidates to manage money and food."

"Although Bonghyo is clever and resourceful, he is not suitable for managing money and food."

"Now that my power is getting stronger and stronger, money and food are a major matter for the soldiers, I must find a trustworthy, kind-hearted, honest and honest person as the chief officer, I think you two are good."

The two of them glanced at each other, their eyes were full of joy and excitement, and they were both worried: "The lord can give us the two of us such trust, even if we are broken, we can't repay the lord in case." ”

"However, the two of us are really mediocre in qualifications, and the money and food of hundreds of people are acceptable, tens of thousands or even hundreds of thousands of people, we are really beyond our strength."

Ren Yi said: "This matter is easy to hear. What I have in love is your heart. Knowing is knowing, not knowing is not knowing, there is self-knowledge, I Ren Zijian did not see the wrong person. ”

"But have you forgotten who my Ren Zijian is?"

The two were confused: "Lord, do you mean ......?"

Ren Yi said: "I am born to know, the immortals once taught me the way of arithmetic in a dream, today I taught this way to you, learned this way, and is in charge of the money and food of the entire Central Plains without any mistakes." ”

The two of them said in unison: "That lord, this arithmetic immortal way, I and other mortals, can we learn it?" ”

Ren Yi said: "The road is simple. This arithmetic is easy to learn, and it is at my disposal. ”

Ren Yi continued: "I will teach you a mantra first, and I will write this mantra on paper. ”

Ren Yi pulled a piece of Cai Hou paper and wrote slowly: One by one gets one, one two gets two, one three gets three, one four gets four, one five gets five, one six gets six, one seven gets seven, one eight gets eight, and one nine gets nine; Twenty-two gets four, two-three gets six, two-four gets eight, two-five-one, two-fifty-one, twenty-sixty-two, twenty-seventy-four, two-eighty-six, twenty-sixty-eight; 33 gets 9, 342, 355, 368, 3721, 3824, 3927; four forty-six, four five twenty-two, four six twenty-four, four seven twenty-eight, four eight thirty-two, four nine thirty-six; Five-five-twenty-five, five-six-thirty, five-seven-thirty-five, five-eight-forty, five-nine-forty-five; 6636, 6742, 6848, 6954; seventy-seven forty-nine, seventy-eight fifty-six, seventy-nine sixty-three; Eighty-eight sixty-four, eighty-nine seventy-two, ninety-nine eighty-one.

After the multiplication formula is written, it just takes on a standard inverted triangle.

After writing, Ren Yi said: "Come, you bring the calculation chips." ”

When Liu Gui heard this, he brought the calculation.

Ren Yi took out a counting chip and said, "This is an calculation chip, we will mark it as 1 and replace 1 with this symbol." ”

After speaking, Ren Yi wrote the Arabic numeral 1 on Cai Hou's paper.

Ren Yi continued: "This 1 is just a mark. We call it Ren Yi number, and you can also call it the main public number. ”

Immediately afterwards, Ren Yi wrote 0, 2, 3, 4 on Cai Hou's paper...... 9, all in Arabic numerals.

After speaking, Ren Yi held two calculation chips in one hand and said: "This is a total of two calculation chips, we can call one plus one equals 2, in short, one calculation chip, plus one calculation chip, is 2 calculation chips." ”

"Extend a little, one pound of grain, plus one pound of grain, is two pounds of grain; One stone of grain, plus one stone of grain, is 2 stone of grain. ”

Then, Ren Yi wrote down the equation one plus one equals 2 on Cai Hou's paper, and said, "Look, this is the expression that one plus one equals 2." ”

"If you want to ask, how to express eight taels of gold plus two taels of gold, it's also very simple."

After speaking, Ren Yi wrote down 8+2=10 and said, "Look at how simple this is. Ren Yi's number, every 10 round, 10, means ten taels of gold, ten bows and crossbows, and so on. ”

"There's also an interesting Ren Yi number, which is 0."

"0 represents nothingness, but it is not meaningless."

"It's like the number 10, there is no 0 at the end, it's just a 1."

"By extension, 100 means 100 taels of gold and 100 peaches; 3000 means that there are 3000 beauties in the Palace of the Han Queen, and so on. ”

Seeing Liu Gui and Huang Xu's expressions of sudden realization and nodding their heads, I guessed that these two people should have understood.

Ren Yi continued: "It is worthy of being my good brother, comprehension is strong, and then I will teach you the multiplication operation of the two." ”

"In fact, multiplication, in simple terms, is also a type of addition."

"I'll take the example of two two and four and three three and nine for example."

After speaking, Ren Yi wrote down the equations 2*2=4 and 3*3=9 on Cai Hou's paper.

Ren Yi said: "To put it simply, two times two is equal to the addition of two 2s, and 3 times 3 equals 9 is the addition of three 3s." ”

"I'll give you another example. For example, if I buy a horse and I buy 2 taels of gold each, then I spend a total of 2 times 2 equal to 4 taels of gold, and the rest is the same. ”

"What I said, do you all understand? Next, I will write down all what I have taught on the following rice paper, and you can learn it at any time. Now you can ask me any questions. ”

Huang Xu said: "Lord, this arithmetic has been taught by the lord in simple terms, and we have mastered the general principle. However, this kind of arithmetic, the lord should not show it lightly. ”

Ren Yi said, "Now this kind of arithmetic naturally cannot be widely spread to the world. However, when no one in the world can resist my Ren Zijian's edge, I will make arithmetic public to the world and benefit the people of the world. ”

"What the gods have given me is not just arithmetic. But for now, it is enough to teach you arithmetic for the time being. ”

"You should also be able to appreciate that the skillful use of arithmetic is of great benefit to your management of money and food, which can greatly reduce your workload and reduce the possibility of mistakes."

"This algorithm is named Advanced Mathematics, also known as Ren Yi's algorithm, the main public algorithm. Go and practice. After you master this arithmetic, I will teach you other skills. ”

"As my siblings, you will be the talents of the Three Princes in the future. Remember, this advanced mathematics, without my orders, can only be known by God, the earth, you know, I know, if it does not enter the ears of the fourth person, even Ling'er can't do it, understand? ”

Liu Gui and Huang Xu looked stunned, and said in unison: "I'll understand!" ”

"Well," Ren Yi nodded with satisfaction, and said, "You two will both be appointed as the head of Yanmen, and the official warrant is the same as Ling'er, and I will send it to you in seven days." ”

"However, in this Yanmen, I am Ren Zijian, it is the sky! If he dares to stretch out his hand to Yanmen, don't blame me for making him ugly! ”

"Okay, okay," Ren Yi waved his hand, "It's really useless to get angry with you." Go down, all of you. ”

"No." The two of them bowed their hands in unison and withdrew.

After the two went out, Ren Yi sat on the couch, grabbed an unfinished pork rib, drank some cold rice wine, closed his eyes, and enjoyed the delicious food.

Ren Yi thought to himself: "Arithmetic, addition and multiplication have been taught to the two of them without reservation, I can rest assured of their personalities, I believe that they can take care of money and food." ”

"Next, I'll teach them subtraction and division, so that they have a complete arithmetic system."

"When Ding Yuan's old children return to the west in the future, and I have completely mastered the merger of states, I will pass on another cross-era skill of mine to them."

"As for calculus and probability theory, the two of them are calculated, and their qualifications are not enough. When I have strong military and political strength, I will pass on these two skills to the real mathematical geniuses among the people, and carry forward mathematics together. ”

"If I can reproduce the situation of a hundred schools of thought contending in the pre-Qin period, and the people live and work in peace and contentment, it doesn't matter if I, the emperor, is not right."

"I, Ren Zijian, in this troubled era, want to conquer the world, expand the territory for the people of the world, sweep away all unstable factors, and strive to reproduce the intellectual freedom of the pre-Qin period."

"Then, I can hold my little Ling'er, drag me to the fierce general, and go to Penglai Immortal Mountain to cultivate the immortal ....."

Unconsciously, Ren Yi was a little fascinated by what he was thinking, and the leftovers on the table were wiped out.

"Hiccup......" Ren Yi burped without any image, but fortunately, the camp tent was now empty.

"I have sorted out advanced mathematics," Ren Yi thought, "and the current advancement of science and technology can be temporarily put to an end." ”

"But, where next?"

Ren Yi thought about it, but his body took Ren Yi to Lu Lingju's room very honestly.

Seeing Ren Yi's greasy body, Lu Lingju couldn't help but roll his eyes in disgust, and said, "Husband, what did Liu Gui and you do just now?" Why is it that when you come out, there is no place on your body that is not sticky with greasy? ”

Lu Lingju said as he helped Ren Yi take off his clothes.

Ren Yi said: "Just now we talked about some things, talked about the rise of the place, and didn't notice it for a while, so we stained the clothes. ”

"I'm here to discuss with you the preparations for the Fengwei camp."

Lu Lingju pouted and said: "Zijian, I found that you are getting bigger and bigger, but people are getting more and more boring. ”

Ren Yi said: "This is because our responsibilities are getting heavier and heavier." Okay, Ling'er, you're the best, I promise, after talking about business, I'll take you out for a walk, okay? ”

"Hmph, that's pretty much it." Lu Lingju said.

…………………

Teacher Ren's addition and multiplication, as a math lesson plan for the first grade of primary school, is it still passable?