"Addition and subtraction" was finally taught under Yuan Chang's teacher's face, Guo Jia, Zhao Yun and Han Sui were fine, but Dian Wei was scolded by Yuan Chang from beginning to end, scolding the dog with blood and no skin. Fortunately, Dian Wei endured it for the sake of the legendary wine, otherwise, he would have lifted the double halberd and cut Yuan Chang into eighteen pieces.

"'Addition and subtraction' you've already been mastered, and that's probably it. As for multiplication and division, I'll teach you when you've fully understood the 'addition and subtraction'. ”

Guo Jia, Zhao Yun, Dian Wei and Han Sui are adults after all, and it is not difficult to learn the knowledge of primary school students. In just two hours, everyone can calculate the ledger independently without a single error.

Guo Jia frowned for a moment, and then asked: "Yuan Gongzi, Jia has a little idea, I don't know if it's correct, I hope Yuan Gongzi can give some advice." ”

"Feng Xiaodan's thoughts, to put it bluntly, I must know everything and say everything. ”

Dian Wei looked at Yuan Chang's face, and there was a wail in his heart, he is also a human being, how can he treat the gap so big?

Guo Jia paused, seemed to organize the language of expression, and after a moment of silence, Guo Jia said: "According to 'addition and subtraction', Jia speculates on 'multiplication and division'. For example, if the salary of a county order is 300 stone a month, then 12 months in a year is to multiply 300 stone by 12 months, which is similar to superimposing 12 months, that is, 3,600 stone, which is 'multiplication'; Yuan Gongzi, I wonder if what Jia said is correct?"

"Haha!"

Yuan Chang was stunned, and then laughed and praised: "It is worthy of Fengxiao, and the concept of multiplication and division is deduced through 'addition and subtraction', which is exactly the case." Fengxiao is worthy of being a [ghost talent], and he can't accept it. ”

Well, Dian Wei had to admit that it was right to be treated differently, and he still went to the corner to draw circles.

Zhao Yun and Han Sui also looked admiring, no wonder Guo Jia was valued so much by Yuan Chang, just with this mind, they already thought they couldn't do it.

Yuan Chang thought about it and felt that Guo Jia could not be treated as an ordinary student, just like some geniuses, people can read and skip grades, while some people must go to school step by step. Guo Jia is naturally a genius character, and "addition and subtraction" obviously can't bother him, so it seems that he can be taught more.

"With the mind of filial piety, I will teach you a 'multiplication formula table', as long as this 'multiplication formula table' is fully comprehended, then learning 'multiplication and division' will be twice the result with half the effort. ”

After speaking, Yuan Chang picked up the pen and wrote down the "multiplication formula". After thinking about it, Yuan Chang wrote three copies, Guo Jia, Zhao Yun and Han Sui each had one copy, Guo Jia needless to say, he could go to study, and Zhao Yun and Han Sui, even if they couldn't delve into something more profound, they could also let them memorize it in advance, and it would be easier to understand when they learned "multiplication and division" in the future.

"Look at what, when you have learned the 'addition and subtraction' well, then come to me to get the 'multiplication formula'. ”

Yuan Chang glared at Dian Wei who looked at him, and said angrily.

Dian Wei cried bitterly in his heart, comparing himself with Guo Jia, there was a gap in the past, and there was no reason why he couldn't even compare with Zhao Yun and Han Sui! Thinking of this, Dian Wei felt that he should work hard, so he used the stunt of "one crying, two troubles, and three hangings", and then rolled all over the ground, just to let Yuan Chang give him a "multiplication formula." The IQ is lower than Guo Jia, he admits it, but says that he is lower than Zhao Yun and Han Sui, and Dian Wei does not admit it.

was pestered by Dian Wei so scoundrelly, Yuan Chang finally had to give him a copy. Otherwise, Yuan Chang believes that Dian Wei will definitely stand outside the door chattering and pestering himself when he is with a certain woman in the future.

"Jia Duo thanks Yuan Gongzi for his teaching, if there is any uncertainty, I hope Yuan Gongzi can tell me without hesitation. ”

Guo Jia bowed to Yuan Changzuo with a straight face, preaching and teaching is the duty of a teacher. However, Guo Jia also knew that he and Yuan Chang would not be masters and apprentices, but he was still grateful for Yuan Chang's teachings. As a literati, it's nice to be able to learn something you don't know.

Yuan Chang returned the salute and said: "The field of arithmetic is broad and profound, and today's 'addition and subtraction' and 'multiplication and division' are just a drop in the bucket, I also said it before, not a joke." I have learned 'addition and subtraction' and 'multiplication and division', followed by 'equations', 'inequalities', 'trigonometric functions', 'calculus', 'Gauss's formulas', 'Helen's formulas', 'Newton's formulas' and so on. Only the more we know, the less we know, and there are still many things in this world that we can learn. Just like the stars above the sky, we look at these only things, but when we stand at another angle, we realize that there are many more. It's not that we're not trying hard enough, it's because we're not standing far enough. ”

Zhao Yun, Dian Wei and Han Sui looked at Yuan Chang with starry eyes, unbelievably powerful!

What Yuan Gongzi said was that Jia once thought that he was superior to others, and there were only a few people in the world. Only today did I find out that Jia was once just a blind eye, a frog at the bottom of the well. In this way, Jiadang once again retreated to the mountains and forests to study hard. ”

"Ahem!"

Yuan Chang was almost choked by Guo Jia's words, if because of his own words, let Guo Jia go to the mountains and forests to study, then what should his military advisor do?

"Fengxiao, it is not okay to study behind closed doors. On talent and learning, this son knows astronomy and geography, learns five cars, there are only ten buckets in the world, this son accounts for nine buckets, Feng Xiao has no understanding to ask me, why go back to the mountains and forests to study hard? People who know me call me 'anxious and righteous little Mengwei', do you know why? Because others don't know, come to ask me, I will know everything and tell the other party endlessly. Therefore, Fengxiao must not have the idea of returning to the mountains and forests. ”

"Haha, there are great lives and good wine in this world waiting for Jia to enjoy, how can Jia be so stupid to return to the mountains and forests, it was just a joke before, Yuan Gongzi must not take it to heart. ”

Yuan Chang's thought of persuasion came to an abrupt end, but he didn't expect to be scolded by Guo Jiasha. But it's okay, as long as Guo Jia doesn't have the idea of returning to the mountains and forests.

Zhao Yun, Dian Wei and Han Sui blushed, wanting to laugh but not daring to laugh. They really didn't expect Guo Jia to have such a funny side, looking at Yuan Chang's excited expression just now, they couldn't help but think about it. However, they also knew that if they laughed out loud, they would probably be remembered by Yuan Chang, so they kept holding back.

It's a pity that although the three of them couldn't hold back their laughter, Yuan Chang lost face, but he still didn't plan to let the three of them go.

"What are you doing, do you think you already understand 'addition and subtraction'? Don't you let me learn, do you know what a decimal point is? Do you know what a fraction is? Look at how hard people work in filial piety..."

Before Yuan Chang finished speaking, he saw Guo Jiayi sipping wine and watching Yuan Chang teach the three of them a lesson, and suddenly couldn't go on.

"Ahem, the weather is really good today!" Yuan Chang snorted, and then looked at Zhao Yun and the others: "In order to test the results of your learning, the rest of the ledger will be handed over to you to check, the sage said that practice is the only criterion for testing the truth, and then it's time for you to perform." ”

Zhao Yun and the three of them looked at the remaining four-fifths of the ledger and were stunned.

They finally understood why Yuan Chang wanted them to study with Guo Jia, and the relationship was to let them be coolies. It's useless to know now, who made them already understand ancient Indian numerals and addition and subtraction. So, the three of them started working with a crying face on their faces. As for Dian Wei, he didn't dare to pretend to be dead anymore, otherwise, the wine would definitely be gone.

"Life is really good!"

Seeing Yuan Chang take a sip of the wine comfortably, Zhao Yun and the three of them burst into tears again, and then buried their heads in checking the calculation.