The three of them followed the old man up to the second floor, and they were still scattered in four or five places, but there were still two private rooms in the back. Sister-in-law Lu happened to come out of a private room www.biquge.info Pen Fun Pavilion, and when she saw them, she was immediately overjoyed and hurried over here.

"Miss, you're here. When Sister-in-law Lu arrived, she called enthusiastically.

When the old man saw it, he was sure, nodded at the three of them, and said, "This is really the eldest lady." The three of you, please sit inside. The old man looked at her more carefully as he spoke, and there seemed to be appreciation in his eyes, and said, "It's not okay to leave the person at the other end of the counter, so the old man will go down first." ”

Sister-in-law Lu responded respectfully: "Alas. Trouble Mr. Wu. I led the eldest lady to sit down first, and then went down. The baby's homework is almost done. ”

When she heard this, she also looked at the old man carefully, he really didn't look like an ordinary old farmer in the market, although his clothes were simple, but there was a bookish atmosphere between his words and actions. Looking back, the last time everyone seemed to mention that the baby was studying with an old Mr. Wu, I think this is. People are charitable. I thought that Mr. Wu just came to teach the baby, but when he saw that the Lu couple was busy, he volunteered to help.

Mr. Wu looked back at her again before going downstairs, and she nodded respectfully at the old man.

Sister-in-law Lu led them to a private room at the back, only served tea, and didn't need them to order food, so she confessed and left in a hurry.

The next moment, a small head came in.

"Baby, come in. She smiled and beckoned to the little head.

"Hehe, this room has been kept, and when I heard the movement, I knew it must be you. The baby jumped in, but it was a surprise, "Where is the teacher? Why didn't the teacher come?"

The baby's finger is naturally Liang Sheng.

She replied, "Your teacher Liang is busy, and we are the only ones here today." ”

Unlike the last time they met, this time the baby was close to her. Although Liang Sheng was a little disappointed, he also stood in front of her enthusiastically.

She touched the top of the baby's head affectionately, but the baby still hid.

She smiled and said, "Baby, have you grown taller?"

When the baby heard this, she was immediately overjoyed, and shouted, "Well, I've grown taller." So Sister Zhen'er, don't keep touching my head, you won't grow tall. ”

She blurted out, "How so." Baby, do you know the truth of seedlings to grow?"

The baby glanced at her and didn't speak, but said in her eyes: "Do you still need to ask such a simple truth?"

She shook her head and said, "You understand the truth of seedlings, but you don't understand the opposite." Sometimes you have to put some pressure on the seedling so that it will thrive more. I touch your head, only occasionally, and not only will it not hinder you from growing taller, but it will also put pressure on the top of your head. In fact, as a boy, you don't want to be touched by my daughter's family, right? Then in order not to be touched by me, you will grow taller faster, and when you are taller than me, I will naturally not be able to touch the top of your head again. ”

Wa'er tilted her head and thought for a while, not quite believing it but not completely disbelieving it, and asked, "Really?"

She couldn't help but laugh and said seriously, "Really." ”

The baby's eyes rolled, and she seemed to believe it, but she still shouted: "Then don't touch the top of my head." I know I don't like to be touched by your daughter's family......" The second half of the sentence The baby just muttered quietly, combing her hair with both hands to cover up, and her little face was red.

"Okay, okay, don't touch it. You come and sit down, I'll test you, can you understand the ninety-nine multiplication table I taught you first?"

"Forty-five. The baby blurted out.

"Six-seven?" she asked again.

"Forty-two. "The baby doesn't want to think about it.

"Eighty-nine. ”

"Seventy-two. ”

Three questions in a row, the baby answered accurately. She nodded, and praised as she said, "Well, the baby is very smart and learns so fast." On the other hand, he dishonestly sneaked on the top of the baby's head.

The baby was only immersed in the joy of being praised by her, and she didn't seem to notice that the top of her head was touched by her again.

After the baby reacted, without waiting for the baby to have a seizure, she said: "Then I'll teach you some new ones today." ”

The baby was overjoyed, and suddenly forgot about being secretly touched by her just now, and only urged again and again: "What are you going to teach me today?

But she mysteriously betrayed it again and asked, "Until then, I have to test you." You know, the opposite of this multiplication is division. The reverse applies to the ninety-nine multiplication table. Baby, you are smart, I don't know if you thought of it before. For example, if five times nine gives forty-five, then dividing forty-five by nine would give you five, or dividing forty-five by five would give nine. That's division. So, seventy-two divided by nine deserves?"

Wa'er thought for a moment, combed her hair with both hands, and replied accurately after a while: "Eight." ”

She nodded, touched the top of the baby's head again, and said, "The baby is really smart, I will teach you." ”

The baby smiled, and realized it again.

Without waiting for the baby to attack, she naturally immediately said: "You are still a little unskilled in this ninety-nine multiplication formula, but since you already know how to convert, you should soon be able to understand it if you practice more later." Today I will teach you the method of addition, subtraction, multiplication and division of the decimal system, which can be calculated as a single digit, a ten, a hundred, and a large number of large quantities can also be easily calculated. ”

The baby was easily distracted by her again, and she didn't pay attention to the slight chaos on the top of her head, and only listened carefully.

She dipped her hand in some tea and drew examples of addition, subtraction, multiplication, and division on the table.

"This is the plus, this is the minus, this is the multiplication, this is the division. Addition and subtraction are simple. The addition is from right to left, adding vertically, and if it is full of ten, it will enter one place, and the fraction will fall. Subtraction is the same, subtract vertically, and borrow one place forward if it is not enough. When all is done, the number is the result. From the right, there are single, ten, hundred...... From the beginning, the result of forty-five plus seventy-two is one hundred and seventeen. ”

Seeing the baby nodding, I have to teach.

She pointed to the forty-five times seventy-two example she had written in advance, and continued: "The multiplication method should be combined with the ninety-nine multiplication table mental arithmetic and addition. Multiply the top 10 digits and the following 10 digits to drop the result. One more place, multiply the top ten digits with the following ten digits, and directly fall into the ten places. If there are still hundreds or thousands of transports, it is also the same reason, and the whereabouts of one person are entered. Then, the dropped numbers are added. The final result is forty-five times seventy-two, which is three thousand two hundred and forty. As she explained, she repeated an example of 15 to 20 percent, "If you hit zero, leave one row free." If the zero is in the single digit, the single digit will be vacated. If the zero is in the 10th place, there will be 10 places to be left behind. ”

Seeing the baby's thoughtful expression, she gave the baby some time to digest.

Wa'er suddenly asked, "Then what if zero is in the hundred, and there is no one in front of the thousand?"

"Poof. She blurted out and said, "Silly boy, zero is nothing, that number, there are no hundreds, isn't it ten digits." So, zero can't be at the forefront. ”

was laughed at for being a stupid child, and the baby was a little unhappy, but after thinking about it, he did ask a stupid question. Seeing her smiling indulgently, the baby's face was red again, buzzing, and there was no argument.

At this time, an old voice suddenly asked, "What about division?"