The vigorous study of mathematics and arithmetic began in the Tai Chi Palace.
Li Shimin sat behind the top table.
Pei Ji, Li Gang, Kong Yingda, Changsun Wuji and other ministers, each holding a digital arithmetic book in their hands, sat below.
Prince Li Chengqian explained its meaning to the ministers.
Fortunately, these ministers all have digital arithmetic books copied by Li Chengqian himself. In addition, the ministers in the entire hall are already considered to be the smartest people in the Tang Dynasty, and they all have a foundation in arithmetic.
Therefore, Li Chengqian only explained it for half a day.
These ministers have already learned a rough idea.
Go back and think about it carefully, and you will be able to understand the most basic addition, subtraction, multiplication and division of arithmetic.
As for the equations, Li Chengqian himself hasn't learned them very well yet, so naturally he won't teach them to these people.
However, now Li Shimin, Pei Ji and others just want to use digital arithmetic to replace accounting and arithmetic. It is enough to learn addition, subtraction, multiplication and division.
After that, it took less than a few days.
All the officials in Chang'an City began to hold a digital arithmetic book in their hands and follow their chief officials to learn digital arithmetic.
…
Zheng family in Xingyang.
The head of the family, Zheng Yuanzhe, and the elder of the second room, Zheng Yuanjing.
Looking at the digital arithmetic book handed down by Zheng Mingde below, his face was filled with curiosity.
"Um?"
Just looking through it, I couldn't help but frown slightly and looked at Zheng Mingde.
They have never seen half of the text.
"Lao Ba, these strange characters are the numbers that are widely circulated in Chang'an City?"
"Back home, it's exactly that number!"
Zheng Mingde nodded quickly and replied, "Please see, this first page is the annotation of numbers..."
Then, Zheng Mingde recounted everything he learned from the officials of the Zheng family in Chang'an City.
After hearing this, both Zheng Yuanzhe and Zheng Yuanjing were shocked.
After a long while, the two looked at each other and said directly: "Mingde, make ten copies of this book. Let the home school also start teaching arithmetic with this number!"
"Yes, Master!"
Zheng Mingde nodded quickly and responded.
"I heard that there is also an enlightenment alphabet?"
Zheng Yuanzhe continued to ask.
"Go home, Lord, this is true!"
"Are there any books?" Zheng Yuanzhe asked.
"Master, it seems that only Prince Li Chengqian has the Enlightenment Alphabet Book. However, Prince Li Chengqian carries this book with him every day, and there is nothing we can do about it!"
Zheng Mingde quickly explained.
Hearing this, Zheng Yuanzhe and Zheng Yuanjing both had a flash of regret in their eyes.
Afterwards, Zheng Yuanzhe continued to look at Zheng Mingde.
"These are all created by the young master in Lijiazhuang?"
"Master, Li Er has never been to anywhere else except Lijiazhuang in the past few days!"
Zheng Mingde quickly handed over his hand and replied.
After hearing this, Zheng Yuanzhe frowned slightly and said, "Didn't that young master come out on his own during these days?"
"Go home, Lord, not even once!"
"What a pity! I didn't expect that Li Er is really lucky!"
Zheng Yuanzhe sighed slightly and raised his head to look at Zheng Mingde.
"Is there any way to arrange for someone to contact that young master?"
"It's the head of the family, Mingde will take care of it now!"
Zheng Mingde quickly handed over his hand, "However, the guards guarding Lijiazhuang are all Li Er's personal guards, so it is difficult to arrange manpower. I heard that Li Er sent many craftsmen who will serve as supervisors and young master supervisors to Lijiazhuang..."
"Go for it!"
Zheng Yuanzhe nodded slightly.
"Yes, Master!"
Zheng Mingde looked solemn, bowed, and then left.
at the same time.
The Boling Cui family, the Qinghe Cui family, the Fanyang Lu family, the Taiyuan Wang family, the Jingzhao Wei family, the Hedong Pei family... and other aristocratic families, each head of the family held a book on numeracy and arithmetic in their hands and issued the same order.
In Chang'an City, a strange atmosphere appeared inexplicably.
…
However, there is still peace in Lijiazhuang.
"Gao Ming, bring your fish basket. If you have nothing to do this afternoon, I will take you down to the river to catch fish!"
After lunch, with Li Chengqian's help, Li Xuan washed all the dishes and chopsticks, looked up at the sun, and said to Li Chengqian.
"Go down the river to catch fish?"
Upon hearing this, Li Chengqian's eyes lit up, and his face was filled with joy.
They ran to the side room separately and followed Li Xuan's instructions, carrying a fish basket half a man's height on their backs, a long fishing net on their shoulders, and a fishing rod in the other hand.
He followed Li Xuan in a hurry. Although there were many things and he needed to adjust his position from time to time, his face was full of joy, just like a little follower, which made several guards in the distance look sad.
Your Royal Highness, a good prince, turned out to be like this not long after he came to Lijiazhuang. Fortunately, the queen did not see it, otherwise...
Just thinking about it, these guards could not help but shake their heads in shock.
"Master, why did you suddenly think of catching fish today?"
The river is right next to Lijiazhuang Village, so within a few steps, the two of them had already arrived at the location.
Putting down his equipment, Li Chengqian asked with curiosity on his face while wandering along the river.
"If you want to eat fish, come and catch it!"
Li Xuan casually replied, "The sun is so bright today. It will be very comfortable to sit by the river and catch fish. There are not many such warm days, so you must cherish it!"
"Yes, Master!"
Li Chengqian nodded lightly.
As for Li Xuan's answer, Li Chengqian doesn't care.
Now, it was his first time to catch fish by the river in person, and his face was already flushed with excitement.
After Li Xuan strung an earthworm on a fishing rod and handed it to him, Li Chengqian excitedly shook off the fishing rod and stared at the river surface.
As for Li Xuan, he was lying on a large bluestone bored.
A relaxed look on his face.
From time to time he would raise his head and glance at the river, then lie down again so that the sun could fully shine on him.
"Master, why haven't the fish taken the bait yet?"
For a long time, he didn't feel any movement from the fishing rod, and Li Chengqian couldn't help but feel anxious.
"Lift the fishing rod and take a look. Are the earthworms still there?"
Li Xuan moved his eyelids and said slowly.
"ah?"
Li Chengqian was startled and quickly picked up the fishing rod.
However, the fishhook was already bare, and his face suddenly filled with anger.
"Master, those thieving fish have secretly eaten away the earthworms!"
"No problem, keep stringing earthworms and keep fishing!"
Li Xuan said.
"yes!"
Li Chengqian still trusted Li Xuan very much.
After that, he continued to string earthworms on the fishhook and threw it into the river.
Then, another long time passed, but there was still no movement from the fishhook.
Li Chengqian was a little anxious again, turning his head from time to time to glance at Li Xuan.
In the end, I couldn't hold it back anymore.
"Master, there is still no movement!"
"Pick up the fishing rod and see if the earthworms are still there?"