1. Understanding the concept of decimals: First of all, we need to understand what decimals are and what is the difference between decimals and integers. Decimal is a way to express fractions, which can be finite or infinite. For example, 0.5 and 2.3456789 are all decimals.
2. Master the operation rules of decimals: the operation rules of addition, subtraction, multiplication and division of decimals are different from those of integers. For example, when adding decimals, you need to align the decimal points; In decimal multiplication, the decimal point is ignored in the multiplication operation, and then the position of the decimal point is determined.
3. Learn the application of decimals: decimals have many applications in real life, such as calculating price, length and weight. By learning these applications, we can better understand and master the knowledge of decimals.
4. Practice consolidation: consolidate the decimal knowledge learned through a lot of practice. You can start with simple topics and gradually increase the difficulty. At the same time, you can also improve your ability by solving practical problems.
In a word, the construction of decimal mathematics knowledge system needs to start with understanding concepts, mastering operation rules, applying what you have learned and practicing a lot. Only through continuous study and practice can we truly master the knowledge of decimal mathematics.