"Optimization" Fun Mathematics PPT

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"Optimization" Fun Mathematics PPT

Part One: Learning Objectives

1. Independently explore and solve the diversity of problems and find the most reasonable and time-saving solution.

2. Use optimal methods to solve simple problems in life.

3. Be able to draw simple event flow charts.

[Key Points] Find the optimal solution from multiple solutions to the problem.

[Difficulty] Learn to arrange time reasonably by adjusting the sequence of events according to the circumstances of specific events.

Optimizing PPT, Part 2: Exploring New Knowledge

How to make tea in the most time-saving manner?

Make tea

Please arrange the order for making tea.

What can be done simultaneously? How to make tea in the most time-saving manner?

Think about how long it will take?

If the time required for each item is added up, how long will it take in total?

2+1+1+1+8+1=14 (points)

pancakes

Dad, Mom and I each have one.

Only two cakes can be baked at a time, both sides must be baked, and each side requires 3 points.

What is the most time-saving way to bake?

1. How can we eat the cake as soon as possible? Share your ideas with peers.

You can bake 2 pieces first and then 1 to save time.

It's such a waste of time to burn them one by one.

2. This is what mom does, can you understand? Say it, do it.

3. What if you want to bake 4 or 5 cakes? Share your ideas with peers.

To bake 5 cakes, you can bake 2 cakes first and then 3 cakes.

Optimizing PPT, Part 3: Classroom Exercises

1. Are these practices correct?

(1) Xiaohong plays games while taking a bath. ( )

(2) You can wash the dishes while cooking rice. ( )

(3) You can sing while eating. ( )

(4) If you fry one egg, it will take 2 minutes to fry both sides. If you fry 7 eggs, it will take at least 7 minutes. ( )

2. Teacher Li went to copy the materials. He copied a total of 23 pieces of text materials, both front and back. If a maximum of 2 sheets are placed at a time, and each copy takes 10 seconds, how many seconds does it take to complete the copy?

10×23=230 (seconds)

Answer: It will take at least 230 seconds to complete the copy.

Optimizing PPT, Part 4: Class Summary

To solve the problem of reasonable time arrangement, you can follow the following steps:

1. Think about what needs to be done to complete a job;

2. Analyze how long it takes to do each thing;

3. Arrange the sequence of work reasonably, understand what to do first, what to do next, and which things can be done at the same time.

For situations where you can only bake 2 cakes in the pan at the same time, no matter how many cakes you bake, just make sure to put 2 cakes in the pan every time to save time. If the number of pancakes is an odd number, bake 2 sheets first, then bake the last 2 sheets alternately. If the number of pancakes is an even number, bake 2 sheets 2. This method saves the most time.

The best way to make pancakes is to put as many pancakes as required in the pot every time, which saves space and time.

Optimizing PPT, Part 5: Classwork

1. After Naughty comes home from school, he does homework for 60 minutes, plays chess with his father for 25 minutes, washes clothes in the washing machine for 20 minutes, and practices calligraphy for 15 minutes. What is the minimum time required to complete the task?

60+25+15=90 (minutes)

Answer: It takes at least 90 minutes to complete the task.

2. To grill mutton skewers, grill both sides. It takes 2 minutes to grill one side. Dad uses a barbecue rack and can only put 2 skewers at a time. If he wants to grill 11 skewers, how many minutes will it take at least?

2×11=22 (minutes)

Answer: It takes at least 22 minutes.

Keywords: Free download of Beijing Normal University edition fourth-grade mathematics PPT courseware volume 2, optimized PPT download, fun mathematics PPT download, .PPT format;

For more information about the "Mathematics Fun Optimization" PPT courseware, please click the Fun Mathematics PPT Optimization PPT tab.

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Update Time: 2024-11-22

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