Multiplication relation is one of the most common quantitative relations in life. Establishing the concept of multiple is helpful for students to further understand the significance of multiplication and division and broaden the scope of applying multiplication and division to solve practical problems. This lesson is taught on the basis that students learn the meaning of multiplication and multiplication in table. It is the beginning for students to solve problems by multiplication, and it also lays a foundation for further learning to solve practical problems such as "how many times a number is more (how many times it is less)". It plays an important role in learning to solve problems, mastering simple analytical ideas and problem-solving methods. "How many times is a number" in this lesson is actually to solve new problems with the method of "how many times is a number" and replace new knowledge with old knowledge, thus realizing the transfer of knowledge.

In the process of learning, guide students to find problems, ask questions and come up with solutions. In the process of cooperation and communication with others, we should highlight mathematical ideas and methods such as "orderly thinking" and "optimization process", experience the value of mathematics learning, and effectively improve the ability of analyzing and solving problems.

Analysis of learning situation:

The students in grade two of primary school are eager for knowledge, like practice and are willing to cooperate with others. They already have the ability of preliminary observation and autonomous learning. The students learned to solve problems by multiplication. Moreover, in the first class, middle school students have initially established the significance of the times. In this course, students learn multiple problems on this basis, and they have a certain foundation for solving problems. However, the learning content of "how many times is a number" is still an abstract knowledge for junior students' understanding ability. How to transform the abstract "how many times is a number" into "how many times" requires image understanding. Therefore, only by allowing students to gain a lot of perceptual knowledge through practical operation and with the help of intuitive forms such as line drawings can they gradually transition from the consolidation of old knowledge to the learning of new knowledge. Based on this, this lesson fully shows the internal relationship between communication knowledge with the help of images, so that students can apply it after understanding it.

Teaching objectives:

Knowledge goal: further understand the meaning of multiple, explore a calculation method of how many times a number is, and use it.

This knowledge solves simple practical problems.

Ability goal: extract useful information from scene diagram, ask and answer questions, improve understanding and analysis of problems,

Ability to solve problems. Cultivate students' practical ability and language expression ability.

Emotional goal: feel the close connection between mathematics and life, and experience that there is mathematics everywhere in life. And infiltrate from it.

Through reeducation through labor.

Teaching focus:

1, further understand the meaning of "multiple" and master a calculation method of how many times a number is.

2. Further cultivate students' ability to understand, analyze and solve problems and language expression.

Teaching difficulties:

Train students to solve problems orally in fluent language.