"I exercise, I am healthy" PPT courseware 6

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"I exercise, I am healthy" PPT courseware 6

For several unequal quantities, under the premise that the total number remains unchanged, by moving more and filling up the smaller, an equal number will be obtained. We call this equal number the average of these numbers.

What are the characteristics of averages?

1. It is not a real number;

2. It is smaller than the largest number in a set of data and larger than the smallest number;

3. It can better reflect the overall level of a set of data.

How to calculate the average:

①. Move more and make up for less: It is more convenient to use when the quantity is small.

②: Total quantity ÷ total number of copies = average: the general method of finding the average.

"Judge right from wrong" and tell me why?

(1) The average of these five numbers 18 19 20 21 22 is 20. ( )

(2) All students from Xiangyang Primary School donated to Project Hope, with an average donation of 3 yuan per person. Then, every student in the school must have donated 3 yuan. ( )

(3) The average height of the school basketball team members is 160 cm. Li Qiang is a member of the school basketball team. His height cannot be 155 cm. ( )

(4) If you want to compare the results of two classes, it is more appropriate to use the total score to measure it. ( )

Think about it: Which of the following columns is correct?

The following is a statistical table of eggs produced by a hen in six months. Based on the data given in the question, calculate the average number of eggs this hen lays per month.

(20+23+26+28+30+29)÷6

(20+23+26+28+30+29)÷5

(20+23+26+28+30)÷6

Averages are everywhere in our lives. Please read the following words:

1. During the Spring Festival, the average number of tourists in Lijiang is 30,000 per day.

2. Lijiang’s tourism revenue averages 5 million yuan per day.

3. The average daily temperature in Lijiang in March this year was 15 degrees Celsius.

4. The average age of third-grade students in our school is 10 years old.

5. The average height of Class 3 (1) in our school is 120 cm.

6. Mr. Wang’s average monthly electricity consumption in 2008 was 85 kilowatt hours.

7. In the most water-scarce areas in the west, the average water consumption per person per day is only 3 kilograms.

After class, please look for other averages in our lives?

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"I exercise, I am healthy" PPT courseware 7:

"I Exercise, My Health" PPT Courseware 7 How to find a more complex average problem? Zhang Qiang: (98+95+96+92+95+96+99) 7 Li Ying: (95+96+98+97+96+98+99) 7 Cui Tian: (92+94+96+95+97 +93+98) 7 Put (1.. after the correct expression)

"I exercise, I am healthy" PPT courseware 5:

"I Exercise My Health" PPT Courseware 5 1. Situation Introduction The long diameter of a green turtle egg is 3.94 centimeters. Xiao Hua: the long diameter is about 3.9 centimeters. Xiao Ming: the long diameter is about 4 centimeters. Why are the results said by Xiao Hua and Xiao Ming different? Woolen cloth? The width of the green turtle egg is 2.04 cm. The green turtle egg...

"I exercise, I am healthy" PPT courseware 4:

"I Exercise, My Health" PPT Courseware 4 Learning Objectives 1. Through independent thinking, students will experience the process of generating averages and initially understand the concept of averages. 2. Know the characteristics and functions of averages. 3. Preliminarily learn how to find simple averages. Environmental friendly..

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Update Time: 2024-11-21

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