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Category | Format | Size |
---|---|---|
Beijing Normal University Edition Seventh Grade Mathematics Volume 2 | pptx | 6 MB |
Description
"Feeling the Possibility" Probability Preliminary PPT
Part One: Teaching Objectives
1. Experience the randomness of data through the process of guessing, experimenting, exploring, communicating and analyzing.
2. Be able to correctly distinguish between certain events and uncertain events, and understand the likelihood of uncertain events occurring.
Feeling the Possibilities PPT, Part 2: Introduction of New Lessons
please think
If a uniform die is thrown at random, then
(1) Will the number rolled be 10?
(2) Does the number thrown must not exceed 6?
(3) Does the number thrown must be 1?
Feel the possibility PPT, the third part: exploration of new knowledge
Exploration activity 1
Will it happen if a ball is drawn randomly and it is a red ball?
There are only 10 identical red balls in the box. Will the event "Any ball touched in this box be a red ball" happen?
Under certain conditions, there are some things that we can be sure will happen in advance. These things are called inevitable events.
Under certain conditions, there are some things that we can be sure will not happen in advance. These things are called impossible events.
Necessary events and impossible events are collectively called certain events.
Under certain conditions, there are some things that we cannot be sure will happen in advance. These things are called uncertain events, also called random events.
Exercise 1. Which of the following events are inevitable events? What are impossible events? What are uncertain events?
(1) Throw a uniform dice and the 6 o'clock will turn up when it stops spinning;
(2) Randomly select a certain channel on the TV and a cartoon is being played;
(3) Toss an even coin upwards and it will land heads;
(4) Buy any movie ticket and the seat number is an even number;
(5) Today is Wednesday and tomorrow is Thursday;
(6) There are ten red balls in the box, and the white ball is touched.
Exercise 2. Which of the following events are inevitable events? What are impossible events? What are random events.
①It will be sunny tomorrow; ⑥It is a certainty;
② Thunder will cause rain; ⑦ The sun rises from the west;
③One hour equals sixty minutes; ⑧1+1=2;
④The number rolled when rolling the dice is 5; ⑨1+1=3;
⑤ Turn on the TV and an advertisement is playing; ⑩ Multiply two numbers with different signs and the product is a positive number
Exploration activity 2
Use dice with even texture to play games with your tablemates. The rules are as follows:
(1) Two people play the game at the same time, each rolling a dice. Each person can roll the dice only once, or they can roll the dice several times continuously.
(2) When the sum of the points thrown does not exceed 10, if you decide to stop throwing, your score is the sum of the points thrown; when the sum of the points thrown exceeds 10, you must stop throwing, and your score is 0.
(3) Compare the scores of the two people. Whoever scores more points wins.
Feeling the Possibilities PPT, Part 4: Class Summary
Necessary event: something that can be determined to happen in advance.
Impossible event: something that can be certain in advance that it will never happen.
Uncertain event: something that cannot be certain in advance whether it will happen or not.
Note: Impossible events are definite events, not uncertain events.
Feeling the Possibilities PPT, Part 5: Classroom Quiz
1. Which of the following events are inevitable? What are random events?
(1) Drop oil into water and the oil will float on the water;
(2) Randomly throw a dice with uniform texture, and the number rolled is an odd number.
(1) is a definite event; (2) is an uncertain event.
2. Xiao Ming buys a movie ticket at will. Which is more likely that the seat number is a multiple of 2 or that the seat number is a multiple of 5?
There are more movie tickets with seat numbers that are multiples of 2 than there are movie tickets with seat numbers that are multiples of 5, so it is more likely that the seat numbers are multiples of 2.
3. There are some cards with numbers written on them. Their backs are the same. First, turn their backs up and pick out any one of them:
(1) Which card number is the most likely to be touched, and which card number is the least likely to be touched?
(2) Which is more likely that the number touched is an odd number or that the number touched is an even number?
4. There are 8 red balls, m white balls, and 3 black balls in the bag. Each ball is the same except for the color. Pick a ball out of it. If the probability of getting a red ball is the highest, then the value of m is not may be( )
A. 1 B. 3 C. 5 D. 10
Keywords: Free download of Beijing Normal University version of seventh grade mathematics volume 2 PPT courseware, download of feeling possibility PPT, download of preliminary probability PPT, .PPT format;
For more information about the PPT courseware "Probability Preliminary Feeling the Possibility", please click the Probability Preliminary PPT Feeling the Possibility PPT tab.
"Feeling the Possibility" Probability Preliminary PPT Download:
"Feeling the Possibility" Probability Preliminary PPT Download Part One: Think about it. What does the story of waiting for the rabbit tell us? (1) If you throw a dice with uniform texture at random, will the number rolled be 10? (2) Randomly throw a dice of uniform texture and throw...
"Feeling the Possibility" Probability Preliminary PPT Courseware:
"Feeling the Possibility" Probability Preliminary PPT Courseware Part One Content: Learning Objectives 1. Experience the randomness of data through the process of guessing, testing, collecting test data, analyzing test results, etc. through dice throwing activities. 2. Understand the concept of random events and be able to distinguish them. It's inevitable...
"Feeling Possibilities" Frequency and Probability PPT Courseware 3:
"Feeling Possibilities" Frequency and Probability PPT Courseware 3 New Lesson Introduction Dice (tu zi), also known as color (shǎi). If a uniform die is thrown at random, then ⒈ will the number rolled be 10? No ⒉ The number of points thrown must not exceed 6? must ..
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