"Average" Data Representation and Analysis PPT (Lesson 1)

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"Average" Data Representation and Analysis PPT (Lesson 1)

Part One: Learning Objectives

1. Through the game of remembering numbers, it helps us understand the meaning of averages, learn how to find averages, and initially perceive mathematical ideas such as "shifting more to make up for less" and "correspondence".

2. Combined with the problem-solving process, initially understand the average and realize the necessity of the average.

3. Cultivate our independent exploration and hands-on practical abilities through independent exploration and cooperation and communication.

[Key Points] Understand the meaning of average and master the method of finding average.

[Difficulty] Understand the meaning of the average by using the method of "shifting more to make up for less".

Average PPT, part 2: exploration of new knowledge

Present 10 numbers every 3 seconds and see how many numbers you can remember each time.

How many numbers can Naughty remember each time?

It’s different every time. How do you answer this?

5 appears twice, remember the 5 numbers.

Naughty remembers an average of 6 numbers each time.

How do you come to remember an average of 6 numbers each time?

You can replenish the more with the less.

Whichever time you memorize the most, add the extra part to the time with the least number of times.

Average PPT, Part 3: Classroom Exercises

1. In the 1-point pitching competition, Qisi’s 4 hits were 7, 7, 6, and 8 respectively. What number can be used to express the number of odd shots?

After reading this question, we can think of the average. How should we find it?

(7+7+6+8)÷4=

Total number ÷ times = average

Answer: The average number 7 can be used to express the number of Qisi shots.

2. The following table is a record of temperature changes in a certain place for a week. Please calculate the average maximum and minimum temperatures for this week.

How should it be calculated? How to list the formula?

(8+10+11+12+11+12+13)÷7=

(18+18+20+22+24+20+25)÷7=

Average PPT, Part 4: Class Summary

1. The meaning of the average: The quotient obtained by dividing the sum of a set of data by the number of this set of data is called the average. It can not only describe the overall situation of a set of data itself, but also serve as a standard for comparing different sets of data.

2. How to find the average:

(1) Use the method of "move more to make up for less".

(2) Use the "summation" method, that is, average = total number ÷ total number.

Average PPT, Part 5: Classwork

1. True or false question.

(1) The average can reflect the exact value of each value. ( )

(2) 9 students made flowers together and made a total of 182 flowers. On average, each person made about 20 flowers. ( )

(3) The average of a set of data must be a certain number that appears in this set of data. ( )

(4) There are three classes in the fourth grade, with an average of 40 students in each class, including 38 students in class one, 40 students in class two, and 42 students in class three. ( )

2. The following is a statistical table of the scores of four students in each subject in the midterm exam.

(1) Calculate the average score of each student and fill it in the table.

(2) Please rank the four students based on their average scores.

3. The following is the statistical table of the shooting competition results of the male and female basketball team members of Class 4 (2).

(1) How many shots does each male player make on average? How many shots did the female players make on average?

(2) Compared with the male team members and the female team members, who won this game?

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For more information about the "Representation and Analysis of Average Data" PPT courseware, please click the Representation and Analysis of Average PPT Data PPT tab.

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Update Time: 2024-09-18

This template belongs to Mathematics courseware Beijing Normal University Edition Fourth Grade Mathematics Volume 2 industry PPT template

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