1. He has successful experience in solving some simple practical problems by comprehensively applying related knowledge such as number and operation, space and graph, statistics and probability, and initially establishes self-confidence in solving problems by using mathematics.

2. Get the activity experience and methods of comprehensively applying the learned knowledge to solve simple practical problems.

3. Feel the interrelation of mathematical knowledge and understand the role of mathematics.

(2) cases

Example 1 Design an appropriate packaging method.

(1) has 4 tapes. How many kinds of packaging are there? Which way to save wrapping paper? (Overlap ignored)

(2) If there are 8 tapes, which way to save wrapping paper? (Overlap ignored)

It shows that this is a common problem in life. By solving this kind of problem, students' ability to solve practical problems by comprehensively applying what they have learned can be cultivated.

How high is the TV tower in Shanghai? How high is the TV tower in Beijing? Their height is about the height of several classrooms. How many students are holding hands? Is there any other way to describe the height of the TV tower vividly?

Explaining this problem can deepen students' perception and understanding of large numbers and further develop their sense of numbers. At the same time, students can learn how to collect data by asking questions and consulting materials.