"Uncle village chief, you don't have to go to the east of the village to look around. I have bought all the land there. Tomorrow, you can bring my father to the county government office to get the land deed. Here is two taels of silver for you to have tea. I wonder how much the handling fee will be for 350 acres of land?" Li Yun was very generous and directly gave the village chief two taels of silver as a fee for running errands.

"Girl Li, an acre of wasteland is ten cents, and an acre of good farmland is fifty cents. Two hundred and fifty acres of wasteland, the total is..."

"The total price of wasteland is 2,500 wen, and the price of good farmland is 5,000 wen, which makes a total of 7,500 wen, or 7.500 liang." Li Yun didn't wait for the village chief to tell him the price of wasteland before he told him the total handling fee for wasteland and good farmland.

"Girl Li, you count really fast! I haven't even started counting yet and you've already figured out the total. Girl, you're really amazing."

The village chief didn't expect Li Yun to be so talented. She could count so quickly. He gave her a thumbs up.

"Thank you for the compliment, village chief. This is a fast calculation method." Li Yun did not dare to take credit for it. These were the fast calculation methods commonly learned in his previous life.

"Mom, you are so amazing. Can you teach me that fast calculation method?" Dabao admired his mother very much. He saw that the village chief couldn't calculate the price of the wasteland, but his mother calculated the total price.

"Of course, mom will teach you when the time comes." Li Yun was very happy to teach Dabao, Erbao and Sanbao.

"Mom, do we have to learn too?" When Erbao heard that he had to learn to count, he felt terrible and listless.

"Yes, Erbao, don't you want to be a general? Only after learning this can you know how many soldiers you are in charge of." Li Yun guided Erbao that if he wanted to be a general, he had to study.

"Oh, okay, Erbao will learn arithmetic from mommy." Erbao still couldn't muster up the energy.

"Mom, does Sanbao have to learn too? But Sanbao is very young and I'm afraid she won't be able to learn." Sanbao actually doesn't want to learn either. She just wants to eat. She is a little foodie.

"Of course you have to learn. It's very simple, not difficult at all. It's just that he likes to learn since he is young." Li Yun also saw that Sanbao was curious about many things besides eating. If he was trained well, he might become a scientist.

"Oh, mother, Sanbao, try your best to learn. If you can't, don't blame me for being stupid." Sanbao said weakly.

"No, my Sanbao is the smartest, how can he be stupid? He will learn it if he studies slowly." Li Yun has great confidence in Sanbao. After all, the fast calculation method is very interesting.

After taking the children, Chen Mo, and Qin Lanlan said goodbye to the village chief and went home.

It was already noon when they got home, and Li Yun and Qin Lanlan prepared lunch. Since everyone was tired, they just made a little and ate it.

After dinner, everyone went back to their rooms for a nap and didn't get up until 3 p.m.

After getting up, Li Yun took Dabao, Erbao and Sanbao into her room to learn fast calculation method.

"Since we don't have pens, ink, paper and inkstone, today we will learn the addition formula. We just need to memorize it. When mom comes back with pens, ink, paper and inkstone, she will teach us how to write." Li Yun planned to memorize the addition formula first.

"Everyone, read after me, one plus one equals two." After Li Yun read it once, he stopped and waited for the children to read.

Children: "One plus one equals two."

"Mom, what does one plus one equals two mean?" Curious baby Sanbao asked the first question.

He said that Sanbao liked to learn it the most because it was fun and simple. As expected, Li Yun was not disappointed. Sanbao was the first to ask a question.

"One plus one equals two, which means one plus one equals two. First, extend one finger, then extend another finger, and then add up the two fingers to see if they equal two." Li Yun said as he extended his fingers to teach them.

The first, second, and third children followed their mother's lead, stretching out one finger, then another, and then counting one finger at a time until they were two. This realization excited them and made them eager to learn.

Li Yun knew that math was something many people enjoyed because it was the most interesting subject. Therefore, almost everyone did poorly on elementary school math tests. It was only in junior high, where the difficulty level was higher, that some students' grades dropped.

"Mom, this is so interesting. I want to learn it. Is there a second sentence?" Sanbao was completely attracted and completely forgot about her previous reluctance to learn.

"Yes, mom, I want to learn too." Dabao was also interested.

"Mommy, Erbao wants to do that too. It's so interesting! One plus one equals two. It's so interesting." Erbao thought it would be difficult at first, but he didn't expect it to be so easy.

"Since you all want to learn, mother will continue to teach you." Seeing that they were already interested, Li Yun continued to teach.

"One plus two equals three." After Li Yun finished reading, he waited for the children.

Children: "One plus two equals three."

"One plus two equals three, which means one finger plus two fingers equals three fingers." Li Yun said again while stretching out his fingers to teach them how to count.

Dabao and the others also followed their mother's example and counted with their fingers.

"One plus three equals four." Li Yun said again while teaching the children to count.

Dabao, Erbao, and Sanbao also followed their mother and raised their fingers to learn arithmetic: "One plus three equals four."

Under Li Yun's guidance, Dabao, Erbao and Sanbao quickly understood how to calculate.

Knowing that the children already knew how to count, I started teaching them to recite the formulas.

"One plus one equals two." Li Yun read a sentence.

"One plus one equals two." The children read a sentence.

"One plus two equals three." Li Yun read another sentence.

"One plus two equals three." The children read again.

"One plus three equals four."

"One plus three equals four."

"One plus four equals five."

"One plus four equals five."

"One plus five equals six."

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