They have never thought about the true meaning of mathematics.
A group of children scratched their heads one after another.
Ning Yunxi understands the expressions of children very well. Mathematics itself is a very abstract science. Many ordinary people regard mathematicians as aliens and say they are aliens, for this reason.
Mathematics must be down-to-earth and can only be understood by ordinary people, so at the beginning, we taught children to count apples. But many teachers did not explain thoroughly why apples were counted. They only knew how to calculate.
Ning Yunxi intends to continue this example and simply tell his son, "Mom asks you, how many apples are four apples and six apples?"
"Ten." Leilei could almost calculate this answer without thinking, it was too simple.
"Okay, mom asks you another question. One day, my brother brought four apples, and your second uncle brought six apples, and they all gave them to you. But my mother told you that you can only have eight apples at home. What do you think you should do?"
Ning Yunxi knew that Xiaosi at home had taught his son this simple addition and subtraction operation.
Leilei's little head began to rotate, and his little finger counted, and finally counted it out and said, "I can't put down ten apples, I'll give it to my second uncle if I have two more."
My master is very fair and only accepts four apples from my brother and my second uncle.
"Mom asks you again, one day, your third aunt gives you four small flowers, and your little aunt gives you six small flowers, and you all want to give you. But Mom tells you that only eight flowers can be inserted in the vase at home. What do you think you should do?"
Leilei didn't have to think about it and said, "I'll give it back to my aunt."
"Look, the second time you have an answer so quickly is that you know how to calculate it, right?"
Leilei understands that the same thing is different. Numbers are used to calculate the number of things. As for each thing, it is originally different.
This is how the historical origin of the oldest mathematical sciences came from. People discovered that many of the same rules when counting things, so they abstracted the subject of mathematics.
By the same token, humans are very vague about how much time a person spends, and I don’t know how to describe it. So people began to use mathematics to divide time, making the vague time accurate and clear, which is beneficial to human work and life.
Ning Yunxi re-explained the concept of one to one to twelve o'clock on the clock to his son, and explained to his son that a large grid on the clock is like adding one to subtract one in the calculation announcement.
How could the old man know how to tell the children about these things? Grandpa Meng touched his forehead to teach children is really a big problem.
After finishing the concept of hours, it takes minutes and seconds.
After listening to Teacher Ning's time carefully, a group of older children sucked the air conditioner in their mouths. It felt so complicated. How did they learn it at that time? After thinking about it, Meng Chencheng recalled that when he was young, he actually didn't know how to talk about minutes and seconds when he was young. This kind of time application question seems that it is not something that a child in one year can calculate.
So I have to praise Leilei, and after listening to his mother's speech carefully, I can understand it quickly!
Meng Chenhao was amazed at his son's learning speed.
Chapter completed!