Because the units are the same, the method of comparing sizes directly by integers: comparing the sizes of two integers depends on their digits. If the number of digits is different, the number with more digits is larger.
If the number of digits is the same, the number with the largest digit will be larger compared with the first digit from the left; If they are the same, compare the second place from the left, the number with the largest digit is larger, … and so on. For comparison.
The teaching purpose of seesaw math problems is to understand the differences between objects by using the existing experience. Through activities such as "point by point", we can further understand the weight between two objects. In the process of comparing the weight of objects, it is very important to know the tools for measuring the weight of objects.
The importance of learn mathematics:
1. Mathematics is closely related to our life. To say that the real effect of learning mathematics is not reflected in exam-oriented education, but in my own thinking about the future.
2. The importance of mathematics is self-evident. Mathematics is the foundation of all sciences and an important channel to cultivate logical thinking. It can be said that every major progress of our mankind is strongly supported by mathematics.
3. The application of mathematical knowledge in life is everywhere. From the calculation of daily living costs, to astronomy, geography, quality control, agricultural economy, aerospace, there are shadows of using mathematics.