1, the length unit of the first paragraph. In this section, students will be exposed to the relevant knowledge points of centimeters, meters and line segments. After recognizing these concepts, they will learn to measure the length of line segments with a ruler, draw line segments with a specified length, and finally solve some practical problems in life.

2. Addition and subtraction within 100 in the second quarter. Through the study of this chapter, students will accurately calculate the addition and subtraction of three digits and learn to use addition and subtraction flexibly.

3. A preliminary understanding of the third triangle. In this chapter, students will have a preliminary understanding of corners, master the usage of drawing corners, understand the names of corners, and learn how to compare sizes.

4. Section 4 Table Multiplication (1). This chapter includes four topics: the preliminary understanding of multiplication, the formula of multiplication from 2 to 6, multiplication, addition, multiplication and division and problem solving. The basis of addition calculation within 100 has been established before, so it is not too difficult to understand the content of this chapter.

5. Observing objects Section V, in this chapter, students need to master the recognition of the shape of simple objects observed from different positions, the recognition of the shape of simple three-dimensional graphics observed from different directions, and the inference of the shape of three-dimensional graphics from plane graphics. So as to establish the concept of space and lay a foundation for further study of solid geometry.

6. Multiplication in Table (2) in Section VI. This chapter requires students to be familiar with the multiplication formulas of 7, 8 and 9, memorize the multiplication formulas with their hands by means of several axes, and finally use and solve problems.

7. Section 7 Understanding Time. In this section, students need to have a preliminary understanding of the time unit "minutes" and master the reading and writing methods and the use of time.

8. Section 8 Mathematics Wide Angle-Collocation (1). This chapter is divided into two parts: simple arrangement problem and simple combination problem. Students are required to go through the process of exploring the arrangement law of simple things.

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.