1. Stage division of primary school mathematics teaching

Mathematics teaching in primary schools is usually divided into grades one to six, and each grade has corresponding requirements for mathematics knowledge and skills. As a mathematical concept, the least common multiple is studied in the senior grades of primary school mathematics.

2. Basic knowledge of primary school mathematics

Primary school mathematics teaching focuses on learning and mastering basic knowledge, such as addition, subtraction, multiplication and division, fractions, decimals, geometry and so on. On the basis of these basic knowledge, students gradually began to contact and learn more complex concepts and operations.

3. Introduce the background of the least common multiple

The least common multiple is a concept introduced by senior primary school students, which aims to help students understand the multiple relationship of integers and solve some practical problems. It involves the operation of integers and the properties of numbers, and belongs to an important concept in mathematics.

4. Learn the specific content of the least common multiple

1) concept of multiple: First of all, students need to understand the concept of multiple, that is, a number can be divisible by another number, then this number is a multiple of another number.

2) Introduction of the greatest common divisor: The least common multiple is usually introduced together with the greatest common divisor. Students need to understand the relationship between the greatest common divisor and the least common multiple.

3) Calculation method of the least common multiple: Students need to learn to calculate the least common multiple of two or more numbers, which can be solved by enumeration and prime factor decomposition.

5. The application of least common multiple in learning

The least common multiple is not only a conceptual study, but also can be used to solve practical problems, such as solving the time when two objects reach a certain state at the same time and assigning the optimal scheme of tasks. By learning the least common multiple, we can cultivate students' thinking ability and operational skills to solve problems.

Summary: The least common multiple is usually a mathematical concept in senior primary school. As a property of integer, it plays an important role in the development of students' mathematical thinking and operation ability. By learning the least common multiple, students can better understand the multiple relationship of integers, improve their problem-solving ability, and lay a solid foundation for further study and application of mathematics.