Mathematics Curriculum Standard has arranged four learning areas: number and algebra, space and graphics, statistics and probability, and practice and comprehensive application.

The content of "space and graphics" mainly involves the shape, size, positional relationship and transformation of objects, geometric bodies and plane graphics in the real world. It is an important tool for people to better understand and describe living space and communicate.

Centimeter and meter represent the calculation unit of length, so they belong to "space and figure".

Extended data:

Centimeter and meter begin to learn in the first phase of nine-year compulsory education (1 ~ 3 grades).

In this section, students will learn simple geometry and plane graphics, feel the phenomena of translation, rotation and symmetry, learn some methods to describe the relative position of objects, carry out simple measurement activities and establish a preliminary concept of space.

In the second year (grades 4-6), students will learn some basic features of simple geometry and plane graphics, further learn the methods of graphic transformation and object location, and develop the concept of space.

In the third period (grades 7-9), students will explore the basic properties of basic graphics (straight lines and circles) and their relationships, further enrich their understanding and feelings of spatial graphics, learn the basic properties of translation, rotation and symmetry, appreciate and experience the wide application of transformation in real life, learn the method of determining the position of objects by using coordinate systems, and develop spatial concepts.

References:

Baidu Encyclopedia-Mathematics Curriculum Standard