"The Meaning of Proportion" Proportion PPT Courseware

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"The Meaning of Proportion" Proportion PPT Courseware

1. Explore new knowledge

Where have we seen the Chinese flag?

Think about it, among the sizes of the three flags in the picture above, what other ratios can form a proportion?

The ratio of the width to the length of these flags can form a ratio, such as 40:60=1.6:2.4.

I found that the ratios of the length and width of these flags can be formed into proportions, such as 60:40=2.4:1.6=3:2.

Yes. The ratio of length to width of these three flags is the same. In fact, the ratio of length to width of all flags is 3:2.

2. Application of knowledge

(1) Do it

1. Two ratios from which of the following groups can form a proportion? Write down the possible proportions.

2. How many ratios can be formed using the 4 data in the picture?

(2) Solve problems

Can the ratio of the two corresponding quantities in the tables below form a proportion? If possible, write down the proportions of the composition.

3. Assign homework

Homework: Exercise 8, Question 2, Question 3 on page 43.

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Update Time: 2024-10-01

This template belongs to Mathematics courseware People's Education Press Mathematics Volume 2 for Sixth Grade industry PPT template

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