"Yes, because there are nine rows and nine columns, it's called the nine-by-nine multiplication table. Amy already has some foundation in addition and subtraction, so it shouldn't be too difficult for her to learn this." Meg looked at the neatly arranged stair-shaped multiplication table. Both the horizontal and vertical lines were neat and the handwriting was clear. He put down the pen with satisfaction and smiled.
"Then what's that little cross in the middle?" Amy asked, pointing at the "x" in confusion.
"This is a multiplication sign. It has the same meaning as multiplication, so it's simpler to express it this way." Meg explained with a smile. He asked Amy to sit down on the chair next to him and pushed the multiplication table closer to her. "Only Father knows this multiplication table. You only need to remember 81 items, and then learn the decimal system well. Then you can solve most of the math you need in your life."
"Wow, Father is so awesome. Last time, Teacher Luna told me that if I want to memorize the multiplication table, I need to memorize 1770 items, but I only memorized about 100." Amy looked at Meg with admiration. She didn't expect that not only was her father's handwriting beautiful, but he also knew simpler math than Teacher Luna. He was really amazing.
Although he was standing on the shoulders of the ancient Chinese sages, and it wasn't good to show off, Meg felt really good to be admired by his daughter. He smiled and pointed to the first item on the upper left corner and said, "Then let's learn the first column today. The numbers on both sides of the multiplication sign are the multiplication signs, and the product is the result of the calculation..."
Meg explained the structure of the multiplication table to Amy in detail. Under Teacher Luna's teaching, Amy did have some foundation in mathematics. At least she understood the meaning of each number and had a certain concept of addition and subtraction. However, there was no decimal system in mathematics in this world, so he spent a lot of time slowly teaching Amy the meaning of the decimal system.
What comforted Meg the most was that Amy didn't doubt anything he said. Even if it completely overturned what Teacher Luna had taught her, she still chose to listen to him unconditionally and quickly accepted the concept of decimal multiplication.
"One one is one, one two is two..." Amy recited after Meg. The little girl's memory was pretty good. After reciting after Meg a dozen times, she remembered the first column.
Meg struck while the iron was hot. He recited the entire multiplication table with her twice to give her a general feeling.
"But Father, what's the use of memorizing this?" Amy looked up at Meg in confusion after reciting it a few times.
"Oh, it's very useful." Meg smiled and pointed at the multiplication table. "Look, a plate of Yangzhou fried rice costs 600 copper coins, which is 6 gold coins. Grandpa Mobai ate four plates just now, so it's 4 x 6 = 24. You can know the result directly without having to count them with your fingers. Don't you think it's very convenient?"
"It's really 24 gold coins!" Amy's eyes lit up. She had spent a lot of time calculating the 2,400 copper coins in her mind, but her father had just used the multiplication table to calculate it. This multiplication table was so useful. She said enthusiastically, "Father, I want to learn! I want to learn this multiplication table! If Ai Mi learns it well, then she can really help Father. "
"Okay, then we'll learn three columns today, and we'll learn the rest tomorrow." Meg nodded with a smile. The most important thing in learning was initiative and enthusiasm, and Amy didn't lack either. He believed that she would master the multiplication table very soon.
Noon passed as Amy memorized the multiplication table. Except for Mobai, no other customer came into the restaurant, which showed how deserted this corner of the Aden Square was.
But after selling four plates of fried rice, Meg was relieved. At least he didn't have to worry that the taste of Yangzhou fried rice was not suitable for people in this world. And judging from Mobai's reaction, the effect of the fried rice to relieve muscle fatigue was also effective for him. Maybe he would be a regular customer in the future. This was good news.
"Three forty-two, three fifty-five, three six... three six... three six is too difficult..." Amy looked up at Meg with a sad face. This was the fifth time she couldn't memorize the multiplication table. Tears were rolling in her eyes.
"Okay, then you can memorize up to three fifty-five today. Amy is already very good. Not many children can finish the first column on their first try. You can memorize the rest tomorrow. It's best to do it step by step. " Meg put away the multiplication table and rubbed Amy's hair with a smile. This reminded him of a video he had seen in his previous life where a little girl had cried while memorizing the multiplication table. Sure enough, they were of the same age and had the same troubles.
"Really?" Amy, who thought she was going to be scolded, heard Meg's words, and her eyes lit up again. Father actually said that she was better than the other children.
"Of course it's true. When have I ever lied to you?" Meg looked into Amy's eyes and nodded seriously.
"Okay, Father wouldn't lie to me. I'll memorize the rest tomorrow." Amy nodded, and a bright smile appeared on her face. She was more confident now.
Meg put the multiplication table behind the counter. It was past mealtime, and no one would come to eat. Looking at Amy's messy hair, he walked to the door, flipped the "Open for Business" sign, and locked the door from the inside. Then he took Amy's little hand and said, "Let's go. Father will wash your hair and bathe you. You'll become a clean little fairy."
"Do we need to boil some hot water and bring a wooden bucket?" Amy looked up at Meg and asked.
"No, there's a water pipe upstairs that directly pours out hot water. There's also a bathtub." Meg smiled and shook his head.
"Is it like the faucet in the kitchen?" Amy asked in surprise. The thing that her father called a faucet was so magical. Clear and sweet water would come out just by turning it. It was like magic.
"Yes, it is." Meg nodded and held her little hand as they went upstairs. Amy had only just begun to understand this world, so she was only curious about the modern things at home and did not feel too conflicted.
Amy, who was seeing a bathtub for the first time, quickly got used to it. She sat in the bathtub and flopped her feet, holding the white foam in her hands and giggling. She looked at Meg and said happily, "Father, this bathtub is so fun. And these bubbles smell so good. It smells so good."
"Well, this is shower gel for bathing. Now I have shampoo in my hands. It's used to wash your hair. After washing it, your hair will be very clean and fragrant." Meg said with a smile. He clumsily rubbed the shampoo on Amy's hair with his hands and said softly, "Be good and close your eyes. It'll be very uncomfortable if the shampoo gets into your eyes."
"Okay, Amy wants to become as fragrant as Father." Amy obediently closed her eyes.
Meg gently rubbed Amy's hair. Although his movements were a little clumsy, he was very meticulous. He carefully separated the clumps of hair that were stuck together. In fact, Amy's hair was very smooth.
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