"Understanding of Numbers" Numbers and Algebra PPT Courseware 2

Description

"Understanding of Numbers" Numbers and Algebra PPT Courseware 2

1. Introduce situations and review old knowledge

Present information and clarify issues

1. Mount Everest is 8844.43m high.

2. The composition of a down jacket: 90% down and 10% feathers.

3. Within a certain period of time, the number of days with air level 1 in a certain city accounts for approximately % of the total days.

4. The average annual temperature in Antarctica is only -25°C.

5. More than 500,000 trees were planted in a certain city in a certain year.

Question 1: What are these numbers? Talk about the specific meaning of each number.

Make a request: Students have collected some data in life after class. Please explain the specific meaning of each number in the group.

2. Work in groups to sort out numbers

(1) Group cooperation and sorting out concepts

Organizing tips:

1. Find the relationship between numbers based on their characteristics and organize them in the form of a tree diagram.

2. Discuss the connection between them in groups first, then divide the work and cooperate, and make clear the reasons for the arrangement when reporting.

3. If it is not possible to cover everything, you can select a part of it for sorting.

(2) Reporting and organizing

1. Report and explain the reasons for your classification.

2. While reviewing the organization process, improve the steps of knowledge organization.

Default:

①Recall knowledge points

②Be familiar with the concepts of these knowledge

③ Grasp the relationship between knowledge points (classify the knowledge on the blackboard)

④ Organize knowledge (organize each major category into a knowledge network diagram)

3. Review basic concepts in chunks and make simple applications

(1) Positive numbers, 0, negative numbers, decimals, and fractions can all be clearly expressed using the number line

Question 1: Can you express the numbers 1/2, 2.5, -1/2, and -2.5 on the number line?

Question 2: Observe the number line, what do you find?

Default: The positive and negative numbers on the number axis are arranged correspondingly with 0 as the symmetry point.

There is no largest or smallest integer, which means the number of integers is infinite.

Integers, fractions, and decimals exist in both positive and negative numbers.

(2) Decimals and integers are counted in decimal system.

Show the numerical sequence table:

Question 3: What knowledge did you gain from the numerical sequence table?

Default: digits, counting unit, integer part, decimal point, decimal part

Question 4: ① Please write the two numbers 30.4 and 3.6 in the table. Does "3" in the two numbers have the same meaning?

Default: Different meanings of "3".

Question 5: It’s the same “3”, why does it have different meanings?

Default: Different digits lead to different counting units.

4. Consolidate practice

There are 45 ( ) in 1.0.045.

2.0, 1, 54, 208, and 4500 are all ( ) numbers, and they are also ( ) numbers.

3. The maximum proper fraction whose fraction unit is 8 is ( ), and it becomes an improper fraction by adding at least ( ) such fraction units.

5. Assign homework

Homework: Exercise 14 on page 74, Questions 1 and 3.

Exercise 14, Question 6, page 75.

Keywords: Number recognition teaching courseware, People's Education Press sixth grade mathematics courseware volume 2, Sixth grade mathematics slide courseware download, Number recognition PPT courseware download, .ppt format

For more information about the "Knowledge of Numbers and Algebraic Numbers" PPT courseware, please click the "Knowledge of Numbers and Algebra ppt" ppt tag.

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Update Time: 2024-10-05

This template belongs to Mathematics courseware People's Education Press Mathematics Volume 2 for Sixth Grade industry PPT template

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