"Simple Combination" Mathematical Wide Angle - PPT

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"Simple Combination" Mathematical Wide Angle—With PPT

Part One: Introduction of New Knowledge

give it a try

There are three numbers 5, 7, and 9. Randomly select 2 of them to form a two-digit number. How many can be formed in total?

A total of 6 two-digit numbers can be formed, namely 57, 59, 75, 79, 95, and 97.

Simple combination PPT, part 2 content: course teaching

Do it:

There are three numbers 5, 7, and 9. If you choose two of them and sum them up, how many possible numbers are there?

Possible combinations are 5 and 7, 7 and 9...

I'm a little confused, is there any solution?

Think about it:

What is the difference in the calculated results of the combination of 7 and 9 and 9 and 7?

9+7=16, 7+9=16, their calculation results are the same.

oh! The sum of two numbers has nothing to do with the order!

Do it:

If we first determine one addend, and then determine the other addend, combined with the rules discovered previously, can we avoid confusion? Give it a try!

Simple combination PPT, the third part: knowledge application

There are three friends shaking hands with each other. Every two people shake hands once. How many times do the three people shake hands?

The order in which two people shake hands has nothing to do with it!

There are three handshake combinations, namely Xiaomei and Xiaohong, Xiaohong and Xiaoming, and Xiaomei and Xiaoming.

How can I pay for a pinyin book?

You can first choose the denomination coins that can be used, and then think about how to match them for payment.

Simple combination PPT, part 4: practice in class

Solve the problem

Now there are four pieces of clothing, two tops and two pairs of trousers. How many ways are there to choose a top and trousers to match?

You can choose a top first and match it with pants, so that there will be no duplication and confusion!

Choose a blue top and pair it with pants so you have two ways to style it!

Choose a yellow top and pair it with pants so you have two ways to style it!

There are a total of 4 combinations of clothing.

How many different currency values ​​can be taken out from the following 3 coins?

You can discuss based on the number of coins taken out!

There are three ways to take out only 1 coin. The face values ​​are 1 jiao, 5 jiao and 1 yuan!

There are three ways to take out 2 coins, that is, 1 coin is not taken out. The face values ​​are 6 cents, 1 yuan and 50 cents, and 1 yuan and 1 cent!

There is one way to take out 3 coins. The face value is 1 yuan and 60 cents!

A total of 7 currency values ​​can be withdrawn!

Simple combination PPT, part 5: Class summary

Classmates, what did you gain from today’s study?

I see……

Keywords: Free download of PPT courseware for second-grade mathematics from the People's Education Press, simple combination PPT download, mathematics wide-angle combination PPT download, .PPT format;

For more information about the PPT courseware "Mathematics Wide-angle Collocation and Simple Combination", please click the Mathematical Wide-angle Collocation PPT Simple Combination PPT tab.

"Simple Combination" Mathematics Wide Angle - with PPT courseware:

"Simple Combination" Mathematical Wide Angle Combination PPT Courseware Part One: Exciting Introduction Welcome, I have prepared delicious food for you, go and choose! ... ... ... Simple combination PPT, part 2: independent exploration. Look, Dr. Penguin... for them.

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Update Time: 2024-10-08

This template belongs to Mathematics courseware People's Education Press Second Grade Mathematics Volume 1 industry PPT template

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