【爸媽在海外】小學數學只需會這一項技能，就可直通中學數學，掃清高考數學障礙地基竟是這項小數技能！

Hello everyone, I'm Ellie. Welcome to Parents Abroad. Today I'm going to talk to you about when a child graduates from elementary school, which skill does he need to master? He only needs one mathematical ability. Then his math in middle school will be guaranteed. In fact, I've talked to you about this before. In the previous program, Ellie mentioned that in the first year of middle school, when a teacher takes over a class, he basically knows which children in the class can learn middle and high math in the future, and which children can only learn low math, or even not learn math in the future. One of the most important goals is to see if they have cultivated this mathematical skill in elementary school. Many friends may now think, what is it? Is one skill so important? Don't keep me guessing. Hurry up and say it. Let's reveal the answer to you. This one skill is mathematical ability. I believe many parents or friends will definitely be surprised to hear this. How can you not know how to calculate? You've been in elementary school for six years. All the kids know how to calculate. Not at all. Let me reveal this to you. What you see or understand after you graduate from elementary school, what is the logic behind the calculation that the kids can calculate? You think he can calculate, but he really doesn't know how to calculate. And the ability to calculate, for high school math, especially in the future, is very important for math students who learn middle and high math. So if a child graduates from elementary school, his ability to calculate is not up to par. Even when he was in junior high school, his math was still quite bad. He could even be in the top few in the class. But as he gets older, his grades drop little by little. Even lower and lower. Why? Because his ability to calculate is not up to par. Looking back, many Chinese parents say our kids definitely know how to calculate. And I found that in our elementary school class, almost everyone knows how to calculate. How can it be so exaggerated? Let me tell you the so-called elementary school will do the calculation or you will do the calculation on the surface. What kind of calculation is this? If you go to see your child, especially a child in elementary school level, and those who are still in elementary school, including his classmates, you ask how many of them will be punished for a long time? If you know this data, you will definitely be particularly surprised. Because most children don't know how to do it. Then maybe you are thinking now, I didn't see them say they wouldn't do the punishment. They will still do the punishment. This is true. They won't be punished for a long time. They will still do the punishment. Why? Because first of all, his punishment is not up to par, but up to par. So this is why a particularly common reaction, for example, when you ask your child or your child's classmates, how much is 6 times 9? He will turn his eyes up and think about it seriously. In your opinion, 6 times 9 is 54. This is how it is recited. But in their opinion, it is added one by one. He needs to use 9 plus 9 equals 18. Add 9 again to get 27. Then add 6 more 9s little by little. So you can see that he is nodding his head and turning his eyes up and looking at the sky. He is mumbling in his mouth and counting like he is counting his life. What is he counting? He is adding. So you can see that the punishment of these overseas students is not made up, but added. And if you think back to when you were a child and learned the punishment, we can't say that our punishment is made up, but we all memorized it. No one will not memorize the 99 punishment table. But you can see that among the 7th grade students, not many of them can memorize it. Because they don't think it is necessary. As long as they add it up, they can get the number. But first of all, it will take a long time to calculate. Second, when the number is big, they can't add it up. So naturally, they won't do it. So you can see that they won't do the punishment. Second, when we say that the punishment is added, we have to say the addition. How is the addition done? You will find that the addition is not added. The addition is counted. Why do I say this? It is a very common method. When children learn math in elementary school, when they learn addition, they start from counting. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 2, 4, 6, 8, 10, these are all ok. Then later on, they start to learn addition 5 plus 6 is equal to what? They can't add the number directly. So how do they calculate it? In their mind, it is 5. How many numbers are there on the Internet? It should be 6, 7, 8, 9, 10, 11. When the number is 11, it is the sixth number. So it is equal to 11. So you think they know how to add. They don't really know how to add. They count it. If the number is small, there is no problem. And you can't see any problem. Because they will also get the correct answer. But when the number is big, they can't calculate it. What is the so-called big number? The addition and subtraction of more than three-digit numbers. Let's talk about addition and subtraction first. The addition and subtraction of more than three-digit numbers, especially when you need to borrow a position, need to enter a position, need to borrow a position, a lot of children start to make mistakes. If it goes to four to five, I can tell you without exaggeration. In all these classes that Ali has led, in all levels of schools, as long as the number goes up, including those who need to have a position and a loan, more than half of the students can't pass the addition and subtraction on the first day. The pass rate we are talking about is not 60%. 50% pass. They can't pass. But the addition and subtraction law is still simple for them. The addition and subtraction law is more difficult. As you can see, the calculation level that you can see can only calculate two-digit or one-digit addition, subtraction, multiplication and division. Let's talk about addition and subtraction first. They can do it. But when the number goes up, it can't be added or subtracted. What's the reason behind it? It's hard to count. Second, the entry and exit positions are rarely trained. What is particularly difficult? For example, if there are several zeros in the number, such as 2800 or 2000 minus 1598, when there are a lot of zeros, you need to make an advanced loan to borrow numbers to subtract. Then the children basically start to make all kinds of mistakes. It's a pity. So the most basic calculation ability is very simple. This is addition and subtraction. Generally, students think that addition and subtraction are simpler than multiplication and division. Indeed, when they take the exam, the score in addition and subtraction will be higher. Let's go back to multiplication and division. Before graduating from elementary school, you need to make sure that the child can do three-digit and three-digit multiplication and division. As we just said, ordinary students can do two-digit and one-digit multiplication and division. Two-digit and two-digit multiplication and division are just fine. When you go up to three-digit and three-digit multiplication and division, they don't even know how to do the number multiplication and division. The result of the multiplication and division is how to list the numbers in a row. It's all wrong. So elementary school teachers basically don't teach this part. In elementary school, it's enough for them to know two-digit. Then they can graduate. But in middle school, especially after junior high school, the curriculum in junior high school has already set that children can do all the addition and subtraction. So it won't take a lot of time to do three-digit or even four-digit multiplication, division, addition and subtraction. At most, it's a class. It's like a review class. But later, as they improve their grades, as they learn math more and more, when the numbers get bigger and bigger, there will be more functions, crisis points, and so on. When these directions come out, they will find that they understand math, they know formulas, and they can't get a score. Why? Because the basics of elementary school are missing. So there's no way. It's a pity. They can't get a score. It's such a painful result. This is also a punishment. The most difficult of these four calculations is the punishment. Because basically, when elementary school students go to junior high school, you will find that only half of the students in the class will do the punishment. And among the half of the students, no more than one finger's child will do the numerical punishment. The numerical punishment we are talking about is what we Chinese often use. It's the punishment we've been using since we were little. In the western education system, it's called long division. It's long division. All the children don't know how to do it. The only ones who know how to do it are basically Chinese and Indian children. And the reason is very simple. That's right. It's taught by parents. Or it's taught by the training school Because in traditional schools, whether it's public or private schools, this is not within the scope of teaching. At most, they will do a short division. No child will do a long division. The number we do is the punishment. So when middle school goes down, when it comes to the punishment, everyone will find it particularly difficult. Because when they do a short division, the so-called short division, it's not the short division you learned, it's the western short division. When it comes to short division, it's okay to divide by one digit. It's okay to divide by one digit. If it's more than two digits, most of the children in the class won't be able to pass. They basically don't know how to do it. So you can't blame them. It's true that no one teaches it in elementary school. But the most basic skill of short division is really not very advanced. It's a very advanced mathematical skill or mathematical ability. So I especially recommend that if you can't learn it in elementary school, you can help them to improve their basic skill at home. It's addition, subtraction, multiplication, and division. It's not just that. It also includes the addition, subtraction, and division of multiple digits, that is, the addition, subtraction, and division of three digits or more. The addition and subtraction will be in place. This is the most basic. They all need to be learned. If you teach them these, you will find that in the future when they go to middle school, you will make their way very flat. And the foundation is very solid. For their future study, it can be said that it is infinitely beneficial. Of course, I will add a little more. Remember to make sure that the child memorizes the multiplication table. Don't let him be like the local child who counts up step by step. Counting to the ninth grade is basically up to this level. The highest is the ninth grade. You will find that his math starts to fall down very badly. He can't stay in the middle class. He can only move to the lower class. That's the reason. This basically includes all the key points. But it covers the most important big point. But I still have to remind you that it is not enough to do addition, subtraction, and division alone. You also need to train the child to do a four-factor algorithm. That is, the addition, subtraction, and division all include making sure that he knows how to do such a problem. That is, he knows that he has to do subtraction first and then addition and subtraction. It would be better if he knows how to do square and square. It doesn't matter if he doesn't know how to do it. But he knows the correct order You may think, what is this? We have learned this since we were young. It's a pity to tell you that half of the students in the class We are not talking about those not very good schools. Yes, what Ali said is that they are all private and public schools Half of the students in the class don't know how to do a four-factor algorithm. Because they don't know what to do first. Even what they teach in elementary school is wrong. When they are in middle school, they have to teach again, right? Teach again tells you that you can't do multiplication first and then subtraction every time. That's wrong. You can't do addition first and then subtraction. What is the order? You have to do it this way. Later, I found that a four-factor algorithm includes addition, subtraction and multiplication. Those who did well can still remember to do multiplication first and then subtraction. Those who learned it wrong always do it from left to right. No matter who is multiplication and who is subtraction. Start from the first two numbers to the last two numbers on the far right. Calculate the answer. It sounds like a piece of cake. But I'm sorry. Many primary school students are at this level. So you can imagine how this kind of child can survive in middle and high school. So back to our starting point. If your child graduates from elementary school, if you ask a math teacher in middle school to only choose one math skill, the most important math skill is to let him learn a four-factor algorithm, including a four-factor mixed algorithm. As long as he has this one ability, he is equal to getting the key to all levels of math in middle school in the future. Some parents say what does this mean? I let my child learn more from an early age. What is the sum? What is the derivative? What is the xy equation? Some parents say this is not enough. You see, my child still has to learn statistics. He has to learn addition and subtraction from elementary school. These are all very helpful to improve his mathematical ability. It's true. Ellie has no objection at all. Of course, the more you learn, the deeper you learn, the better. But sometimes you will find that when parents send their children to school, especially in elementary school, the students are very happy to learn. They are happy to teach. When they are in the fifth or sixth grade, they can't even count. Or when they are in the fifth or sixth grade, they find that their children's math is getting more and more mediocre. It's hard to say that the struggle has begun or they don't understand. But it's not as good as it used to be. Calculation is also particularly slow. Why? I'm sorry. This is the result of the great success of the western education system. It's not the children's fault. When they start to make up, they find how to make up which part is the most important. If this is the case, they start to make up from the fifth or sixth grade and hope to get a scholarship and go to a better private school in middle school. In terms of math, you only need to catch one big head. That's all. Ellie told you. You need to cultivate the ability to calculate quadruples. You need to memorize the multiplication table. That's all. That's enough for her to eat for a long time. Trust me. Of course, if your child is already a big bull and starts to learn the addition and subtraction of positive and negative numbers in elementary school, starts to learn the square root, and knows all kinds of divisors, addition and subtraction, that's even better. Don't stop at the addition and subtraction of integers. Don't stop at the addition and subtraction of positive and negative numbers that Ellie just mentioned. If your child can learn more and go further, that's even better. Yes, yes, yes. Yes, there are really children who start to learn probability when they are in elementary school. Including some integrals, what we call integrals, such as square root, they all start to learn. No problem at all. Ellie doesn't want to drag your child down at all. You just let her go around in the world of math and imagine. But for those who don't know where to start, you can't make a mistake if you catch this point. This is a little tip from a senior college entrance examiner. I hope it can help your child and I hope it can help your child to take less detours on the path of math. That's all for today's show. Thank you very much for listening and welcome to share your good experience and the path your child has taken in the comment area with everyone. See you next time with your parents abroad. Bye-bye.