"Average" Average and Bar Chart PPT Teaching Courseware (Lesson 2)

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"Average" Average and Bar Chart PPT Teaching Courseware (Lesson 2)

Part One: Learning Objectives

1. Deeply understand the meaning of average and consolidate the method of calculating average.

2. Accurately apply knowledge related to averages to solve practical problems.

3. Feel the application value of averages in life and experience the fun of learning mathematics to solve practical problems.

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

[Difficulty] Flexible application of averaging method.

Average PPT, Part 2: Classroom Introduction

(1) What is the average number?

(2) How to calculate the average?

(3) What is the use of averages in life?

The average is a virtual number that reflects the overall situation of a set of data.

To calculate the average, you can use the method of moving more to make up for the less, or you can divide the total by the number of copies.

Know the average

Example 2: The students in Class 4-2 organized a shuttlecock kicking competition.

How to compare which team's performance is better?

What did you gain from studying this example?

Summary: When the total number and the number of copies are not equal, you can compare the average to determine the number.

Average PPT, Part 3: Classroom Exercises

1. Do it.

(1) Put 18 flowers into 3 vases on average. How many flowers are placed in each vase?

18÷3=6 (branch)

Answer: Put 6 branches in each vase.

(2) How many flowers are in each of the three vases below? How many branches are placed in each vase on average?

(6+5+7)÷3

=18÷3

=6 (branch)

Answer: There are 6 flowers in the first vase, 5 flowers in the second vase, and 7 flowers in the third vase. On average, 6 stems are placed in each vase.

Average PPT, Part 4: Class Summary

Summary: The average can reflect the situation of a set of data and can be used for size comparison when the total number and number of copies are different.

Average PPT, Part 5: Classwork

1. Local temperature conditions for a week.

average maximum temperature

(21+21+23+24+22+21+22)÷7

=154÷7

=22（℃）

average minimum temperature

(10+10+11+12+11+11+12)÷7

=77÷7

=11（℃）

2. Students in two groups compete in sit-ups. Which group has better results?

Our first group of 4 people made a total of 100 pieces.

Our second group of 5 people made a total of 110.

The average score of the first group is 100÷4=25 (Part 2)

The average score of the second group is 110÷5=22 (Part 2)

Answer: The results of the first group were better.

Keywords: Free download of PPT courseware for mathematics in the second volume of the fourth grade of the People's Education Press, download of average PPT, download of average and bar chart PPT, .PPT format;

For more information about the "Average Average and Bar Chart" PPT courseware, please click the Average PPT Average and Bar Chart PPT tab.

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Update Time: 2024-10-03

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