The second grade mathematics part is a basic knowledge point in primary school mathematics education. In this knowledge point, by guiding students to understand the basic concept of length, students can master how to measure the length of the route and how to combine the lengths of multiple road sections. This knowledge point is consistent with the overall goal of primary school mathematics education, which can cultivate students' spatial imagination ability, logical thinking ability and mathematical calculation ability.
The second grade mathematics part is an important link in the primary school mathematics education system. With the deepening of education reform, the teaching content, methods and means of primary school mathematics are constantly innovating and improving.