1, the concept of large numbers and the speed of progress
Under this classification, we need to cover the definition of large numbers, the difference between large numbers and decimals, and the counting units and ratios of large numbers. For example, large numbers usually refer to numbers with more digits, while decimals refer to numbers after decimal points; Counting units can include units, tens, hundreds, thousands, etc. , and the rate refers to the conversion relationship between two adjacent companies, such as 10 rate and 100 rate.
2. How to read and write large numbers
Under this classification, we need to introduce reading skills and writing skills of large numbers. For example, you can use the hierarchical reading method, that is, reading by unit, ten digits, hundred digits, etc. In writing, you need to master the writing methods of 0-9 and decimals, as well as scientific counting methods.
3. Four operations of large numbers
Under this classification, we need to introduce the operation methods and precautions of addition, subtraction, multiplication and division of large numbers in detail. For example, subsection addition can be used to increase the number; The multiplication operation can adopt vertical calculation method, etc. Division can be done by subsection subtraction and so on. At the same time, we also need to pay attention to the promotion and positioning problems in operation.
The benefits of learning mathematics:
1, cultivate logical thinking ability
Mathematics is a subject that needs logical reasoning, and learning mathematics can help us cultivate our logical thinking ability. By solving mathematical problems, we can learn how to analyze problems, decompose problems, find laws and get answers. This kind of logical thinking ability is not only very important in mathematics learning, but also helps us to deal with problems better in our daily life and work.
2, it is widely used
Mathematics is a basic subject, which is widely used in our daily life and work. For example, in the financial field, we need to carry out mathematical operations to calculate interest and return on investment. In the field of science, we need to use mathematics to analyze data and build models. In the computer field, mathematics is the core foundation, and algorithms, data structures, cryptography and so on are inseparable from mathematics.
3. Improve the cognitive level
Mathematics can make us better understand the laws and order of the world. By studying mathematics, we can understand the basic concepts such as numbers, shapes and spaces, so as to better understand the world. At the same time, mathematics can also help us broaden our horizons, understand more mathematical problems, and stimulate our curiosity and exploration spirit.