Toán lớp 2 - Tìm số bị trừ

Welcome to 360 degree in VN, a website for young and elementary school students. In this video, we will find out how to find the negative numbers in the second grade math program. In the negative calculation, what are the components? Please follow the following example. For example, we have a 13-5-8 equation like this. The 13th value is called the negative number. The 5th value is called the negative number. The 8th value is called the positive number. What is the negative number? It is the number that we subtract from it. The negative number is the value that we subtract from the negative number. For example, the 13th value is the negative number. What is the 5th value? It is the 5th value that we subtract from the 13th value. The 8th value is the value that we subtract from the negative number. In some math problems about negative numbers, sometimes people do not give the value of the negative number. Specifically, how much? But we have to find its value. For example, the following math problem. X minus 7 is 6. Our job is to determine how much X is. That is, how much is the negative number? This video will help you determine the negative number in math problems like this. To calculate the value of the negative number, we do it in one of the following two ways. First, the negative number is equal to the negative number plus the number. The negative number is equal to the negative number plus the negative number. This is the formula that we need to follow to find the value of the negative number in some math problems. Now we use this formula to find the value of the negative number in the above problem. Here, X minus 7 is equal to 6. X is the negative number. The negative number is equal to the negative number. The negative number in this case is 7. Plus the number. The number in this case is 6. Therefore, we can write the formula as follows. X minus 7 plus the number. The number in this case is 6. And we calculate the value of 7 plus 6 is equal to 13. Thus, X here is equal to 13. That is the job we have to do to find the negative number in the negative problem. Now let's do some more examples. For example, X minus 8 is equal to... X here is the negative number. We can use one of the two formulas here to find X. X is equal to what? The negative number is 8. Plus the number. The number in this case is... And we have X is equal to... 8 plus 9 is equal to 17. And the formula is X is equal to 17. Next example. X minus 6 is equal to 12. In this problem, the negative number is X. The negative number is 6. And the number is 12. Therefore, X is equal to... The negative number plus the number. Or the number plus the negative number. For example, here we take the number is 12. Plus the negative number is 6. Then we get the result is X is equal to... 12 plus 6 is equal to 18. This is the result of the problem. The last example. Minus 14 is equal to 23. In this problem, X is the negative number. 14 is the negative number. And 23 is the number. We calculate X is equal to... The negative number is 14. Plus the number is 23. And the result is X is equal to... 14 plus 23 is equal to 37. Apply the formula to find the negative number above. Please answer the following equation. I have a pi. I give Hung 5 balls. Then I count again. And I see my pi is 9 balls. At first, I have how many balls? In this equation, we see... I see my pi is unknown. But after giving Hung 5 balls, minus 5 balls, there are 9 balls left. What does it mean? The pi of 5 balls is the negative number. And there are 9 balls left. These 9 balls are the numbers. Our job is to find the negative number. That is the initial pi of An. Please leave your answer. Please leave your answer in the comment section. You can go to the website 360.vn to learn more about these videos. Please click the subscribe button or subscribe to the channel to watch the next videos. Goodbye!