Seven, mathematics wide angle

1. Students can get a preliminary understanding of the application of digital coding in solving practical problems through examples in life.

2. Let students explore the simple method of digital coding through observation, comparison and guess, learn to use digital coding, and initially cultivate the ability of abstract generalization.

3. Let students further understand the wide application of numbers in daily life, try to solve simple problems in real life by mathematical methods, and initially cultivate their application consciousness and practical ability.

4. Make students form a good habit of cooperating with others in mathematics activities, and initially learn to express and communicate the process and results of solving problems.

(B) Teaching materials and teaching suggestions

Textbook description

"Mathematics Wide Angle" mainly permeates some important mathematical thinking methods to students. Through some examples in daily life, this unit enables students to understand the application of digital coding ideas in solving practical problems, explore simple methods of digital coding through observation, comparison and guessing, enable students to learn to code with numbers, and initially cultivate their abstract generalization ability. The standard points out that in the second period, students should "further understand the role of numbers in daily life, and use numbers to represent things and communicate". In daily life, numbers are widely used, and the students in the first phase have already had a preliminary experience, especially the numbers in the first year. In the "Numbers in Life" part of the textbook, there are already examples of numbers applied in life, such as postal code, house number and license plate number. Numbers can be used not only to represent quantity and order, but also to encode. On the basis of students' life experience and existing knowledge, this unit further understands the application of digital coding in daily life, and carries out simple digital coding through practical activities to cultivate students' mathematical thinking ability.

Digital coding is closely related to our life, such as postal code, ID number and telephone number. These numbers all contain the idea of digital coding, and also provide a lot of convenience for our lives. Using numbers or symbols to describe things can simply and accurately express the objective laws contained in things, and also facilitate our classification, inquiry and statistics.

This unit mainly penetrates the idea of digital coding into students through some examples in life, explores simple methods of digital coding through observation, comparison and guess, and applies them through practical activities. Firstly, the textbook is introduced from the teacher's roll call, which shows that we can distinguish each student in the class by digital coding. Next, case 1 and case 2, through life examples such as postal code and ID number, let students experience the application of digital coding in life, get a preliminary understanding of the structure and meaning of postal code, understand some simple information contained in ID number and the meaning of coding, and explore simple methods of digital coding. Examples 3 and 4 are based on this. Students can code with numbers or letters through two practical activities to deepen their understanding of the idea of digital coding. Example 3 is to ask students to give each student a student number in the school, and example 4 is to ask students to give a book number to the books in the corner of the class or school. Phase comparison 3 is more complicated, and it is coded by combining symbols and numbers. This kind of coding can also be seen everywhere in life, such as car license plate number, train number, flight number and product model, so as to realize the universality of mathematics application and improve students' interest and enthusiasm in learning mathematics.

Teaching suggestion

1. Grasp the teaching requirements appropriately.

Digital coding is an abstract mathematical thinking method. Students are only allowed to experience the application of digital coding in solving practical problems through some examples in daily life, explore simple methods of digital coding through observation, comparison and guessing, learn to code with numbers, and initially cultivate students' abstract generalization ability. As long as students can understand some simple information and the meaning of coding from specific examples such as postal code and ID number, they can explore simple methods of digital coding and apply them in practical activities. Students are not required to master the information and meaning of each number in the code. In addition, students can have different coding methods in practice. Teachers should allow students to adopt different forms, let students experience and understand the process of solving practical problems with what they have learned, and cultivate students' exploration spirit and practical ability. The teacher only gives some instructions and guidance when necessary.

2. The content of this unit can be completed in 3 class hours.

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