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Authoritative PPT Summary
"Definite Events and Random Events" PPT
Part One: Introduction to Scenarios
1. Do you know my profession? sure?
2. Toss a coin
If we toss a one-dollar coin up and let it fall to the ground, can you tell which side is up?
communication and discovery
(1) Will you see the sunrise at the top of Mount Tai tomorrow?
(2) Will it rain locally next week?
(3) Will there be an earthquake of magnitude 7 or above in Asia next year?
(4) How much will you weigh today next year?
(5) Will the supermarket’s sales tomorrow be more than today?
(6) Can the shooter hit the bullseye next time he shoots?
No one can give exact answers to these questions. There are many such events in life.
Determined events and random events PPT, part 2: discussion and communication
Draw a rectangular coordinate system on a piece of white paper, and throw a small iron nail from a suitable height directly above the origin of the coordinates.
(1) Where in the coordinate system can the small iron nail fall?
(2) Does it definitely fall in the first or second quadrant?
(3) Does the small iron nail necessarily cross the coordinate axis?
(4) If the small iron nail lands in the third quadrant for the first time, will it still land in the third quadrant after the next throw?
Experimentation and inquiry
Put five ping pong balls marked with the numbers 1, 2, 3, 4, and 5 into an opaque bag, take out any ball from it, and read the number marked on the ball. Think about the following two Will that happen? Why? Communicate with classmates.
(1) The number marked on the ball is not greater than 5;
(2) The number marked on the ball is greater than 5.
concept
Like this, an event that will definitely happen under certain conditions is called an inevitable event.
Like this, an event that will never happen under certain conditions is called an impossible event.
Determined events and random events PPT, the third part: Contact life
1. Xiaohong saw the ants moving and judged: "It may rain." In Xiaohong's opinion, what does it mean that it is going to rain?
2. What event does "Waiting for the Rabbit" depict?
3. When you go to the hospital to inject penicillin, the doctor will do a skin test on you first. Very few people are allergic to penicillin, about one in a thousand people. Why must the doctor do this?
Determined events and random events PPT, Part 4: Expansion and extension
1. Throw two dice at the same time and tell what the following events are.
(1) The sum is 1; (5) The sum is less than 2;
(2) The sum is 6; (6) The sum is greater than 2;
(3) The sum is 12; (7) The sum is less than 18;
(4) The sum is 13; (8) The sum is an even number.
2. Tell whether the following idioms or sayings reflect inevitable events, impossible events, or random events:
① Catching the moon from the water - an impossible event
② Groundless worries - impossible events
③Unforeseen circumstances—random events
④ You will reap melons if you sow melons, and you will reap beans if you sow beans - an inevitable event
⑤The sun rises in the east and rains in the west - random events
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"Deterministic Events and Random Events" PPT download:
"Determined Events and Random Events" PPT Download Part One: Learning Objectives: Initial understanding that the occurrence of some events is uncertain, and the occurrence of some events is certain. Be able to distinguish inevitable events, impossible events and random events in life; be able to correctly Judgment random..
"Deterministic Events and Random Events" PPT courseware:
The first part of the PPT courseware "Determined Events and Random Events" content: The new lesson introduces the little magic trick of guessing poker: draw one from four playing cards (don't let the teacher see it), the teacher can tell you the playing card you drew. The numbers above. If in a certain World Table Tennis...