Liu Wugui stared at the words written by Xiao Tang Ming with incredulous eyes, if he hadn't witnessed the words written by Xiao Tang Ming with his own eyes, he would never have believed that such a beautiful word came from Xiao Tang Ming's hand.

The words written by Xiao Tang Ming yesterday are much worse than those written now.

Xiao Tang Ming was busy with whatever he wanted, lazily ignoring Liu Wuran's stunned eyes.

Even if Liu Wugui wanted to break his head, he couldn't imagine that in 2020, there would be a big Tang Ming helping Xiao Tang Ming practice calligraphy, and Xiao Tang Ming would just be busy with his ancient affairs.

Liu Wubei took those sons and brothers to play skiing, and Xiao Tang Ming hid in the room to sort out the math materials to be used in the afternoon lectures.

Xiao Tang Ming planned to teach those villagers some simple addition, subtraction and multiplication and division, and he sorted out the multiplication formula table.

Xiao Tang Ming wrote out the ninety-nine multiplication table, and found a few people to copy more than 20 copies.

Xiao Tang Ming, who had sorted out the materials, asked Dazhu to inform everyone to go to the classroom to prepare for class, Liu Wuran, they had never taken any counting classes, and they also walked to the classroom curiously.

When the villagers saw that Liu Wuran was coming, they all took the initiative to give up the front position to Liu Wurou and they sit.

Xiao Tang Ming took out a branch and said, "Is one branch plus one branch two branches?"

Everyone replied, "Yes." ”

Xiao Tang Ming took out five branches at a time and said, "One branch plus one branch, until five branches are not five branches?"

They replied yes.

Xiao Tang Ming took the five branches and said, "Isn't it troublesome for us to add them one by one? It's a waste of time? Do you think there's a faster way to get the result?"

This time, everyone was silent and looked at Xiao Tang Ming silently.

"Now I'm going to teach you a kind of multiplication. ”

"You see that I only have one branch in my hand, right? We can all look at it as an equal part, that is, one times one equals one. ”

Everyone looked at the branch in Xiao Tang Ming's hand in a daze, not knowing what Xiao Tang Ming wanted to say.

Xiao Tang Ming held two branches in his hand and said, "How many branches do I have in my hand? Is there only two branches? Is there only one copy? Then you can take one by two equals two." ”

Xiao Tang Ming took three more branches and taught everyone in the same way, but everyone was still confused.

Xiao Tang Ming took two branches in each of his hands and said, "How many branches are there in my two hands?"

The villagers knew that they replied loudly.

"Do you take two and add two to get four?"

The villagers replied yes.

Xiao Tang Ming said: "I want to teach you a multiplication method now, I now have two branches in my hand, that is, take two times two equals four, if there are three parts, take two times three, is it six? If it is four, use two times four, is it eight?"

The villagers' stunned expressions were a little surprised, they seemed to understand Xiao Tang Ming's methods a little.

"I'm going to give you a copy of the multiplication formula table for you to copy and memorize it, and you remember that the one in front is the quantity, and the one in the back is the number of copies, that is, the number is multiplied by the number and so on, and so on. ”

Liu Wulai also got a copy of the ninety-nine multiplication formula, and while looking at the ninety-nine multiplication table, he held a bunch of branches and placed them on the table and swinged them around.

Liu Wubei fiddled for a while, and a smile appeared on his face when he was originally confused.

"Little sir, do you mean that one bun is five cents, and if I buy five buns, five times five equals twenty-five cents?" said Liu Wuli in surprise.

If you memorize the formula, you don't need to add them one by one, and you can calculate the results immediately.

Xiao Tang Ming said: "That's right, that's how it is calculated." ”

Some of the villagers were fiddling with the branches on the table, and some were writing on the ground, and their faces were full of surprise.

"I will go and work as a helper for the rich men in the future, and I will no longer be afraid to settle accounts with them. The third uncle said happily as he counted on the ground.

"Little sir, if my daily salary is eight yuan, and I do it for ten days, I will take eight times ten to equal eighty yuan?"

"Yes, that's how it works, as long as you memorize the multiplication formula, you can calculate it by simply counting. This is just the simplest algorithm in counting, and I will teach you some advanced counting methods when I have time later. ”

Xiao Tang Ming saw that everyone was counting so seriously, he really didn't expect that everyone would have such a high enthusiasm for arithmetic.

But it's also true, not knowing words is not the most important thing in life, and it will be troublesome if you don't count and account.

Maybe you will be deceived when you go out to buy a bun, and you may be deducted from your wages if you go out to help the rich man as a helper.

Xiao Tang Ming thought that the addition, subtraction, multiplication and division were already very practical for them, and those algebraic equations and geometry should not be taught to them for the time being!

"Little sir, I think you are too godly, at first I heard everyone say that you are a mortal fairy in the sky, I don't believe it, but now I believe it, only the gods in the sky will be so smart, where would we mortals think of this!" Liu Wulai said excitedly.

Xiao Tang Ming was speechless, he was not a god, he was just from 2020.

"Little sir, your multiplication table is too good, you find someone to copy it, 2 taels of silver and sell it to me, I will sell it to those princes and grandsons and noble sons. The more Liu Wulai looked at the ninety-nine multiplication table, the more he liked it, and he was absolutely sure that each copy would sell for 20 taels of silver.

When the villagers heard that a ninety-nine multiplication table could buy 2 taels of silver, they were so shocked that they couldn't close their mouths for a long time.

Xiao Tang Ming thought that as long as those multiplication formulas flowed out, others could copy them by themselves, and where they needed to sell them with money, it was better to make a donation.

Xiao Tang Ming thought that if he wanted to run a free school for the poor, he would need money, and he couldn't make enough money by making money.

Those royal relatives and wealthy businessmen, as long as they coax them to donate, it will be easy to do.

After Xiao Tang Ming whispered in Liu Wuran's ear for a while, the more Liu Wuliang listened, the happier he became.

"Okay, I'll do it tomorrow, and in a few days I'll make sure to get all the people in the city with a little bit of family together. ”

Little Tang Ming wants to raise funds to open a school for the poor, and Tang Ming in 2020 is very happy, but he can't help at all.

Tang Ming has money, but his money can't be given to little Tang Ming in ancient times.

Tang Ming only studied hard, and he could only use the knowledge he learned in his mind for little Tang Ming.