Of course, the following is the body of a math article about the "15 minus 9 vertical calculation process", with a total of about 2000 Chinese characters.
Title: 15 minus 9 vertical calculation process: understand the basic method of numeracy.
In our daily life, we often need to do all kinds of calculations. Among them, subtraction is one of the most basic operations in mathematics. Understanding the process of subtraction can be a bit difficult for beginners, especially when it comes to vertical calculations. Today, we will introduce the vertical calculation process of 15 minus 9 in detail to help you better understand the basic method of numeracy.
1. The concept of vertical computing.
Vertical calculation is a common mathematical calculation method that arranges numbers from high to low and derives the result by subtracting or adding it step by step. This method of calculation is very common in primary education because it helps students understand the relationships between numbers and the basic principles of operations.
2. The vertical calculation process of 15 minus 9.
1.Lists the subtracted and subtracted numbers.
First, we'll list the subtracted and subtracted. In this example, the subtraction is 15 and the subtraction is 9.
2.Subtract bit by bit from high to low.
Next, we subtract bit by bit from high to low. Start with the highest digit first, the highest digit of 15 is 1, and the highest digit of 9 is 9. Since 1 is less than 9, subtraction is not possible. In this case, you need to add "borrowed 1" to the unit of the subtracted number to become 11. Then subtract from 11 minus 9 equals 2.
3.Continue subtracting until all the digits are complete.
Next, we continue to subtract from the high to the low. In this case, the unit digit of the subtracted number is 5, and the unit digit of the subtracted number is 0. Since 5 is greater than 0, it can be subtracted directly. 5 minus 0 equals 5. At this point, we've done all the digits.
4.Get the results and check.
Finally, we add the results 2 and 5 to get the final result 17. This result is the result obtained by calculating 15 minus 9 vertically.
3. Summary and reflection.
Through the above steps, we can see how the vertical calculation process of 15 minus 9 works. This process not only helped us understand the basic principles of subtraction, but also taught us how to do vertical calculations. In the process of learning Xi, we need to pay attention to the following points:
1.Carefully check the digits and values of the subtracted and subtracted numbers;
2.Subtract bit by bit from high to low.
3.Pay attention to carry and borrow;
4.Once the results are available, they are checked and verified.
Through continuous practice and Xi reflection, we can gradually master the skills and methods of vertical calculation and improve our mathematical ability. At the same time, we also need to learn to apply this way of thinking to other mathematical problems, so as to better understand and master mathematics.