"Reduction" The meaning of fractions PPT

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"Reduction" The meaning of fractions PPT

Part One: Classroom Introduction

1. Experience the process of knowledge formation and understand the meaning of reduction.

2. Explore and master reduction methods and be able to perform reductions correctly.

3. Explore the intrinsic connections between knowledge and develop good study habits.

About the PPT, the second part of the content: exploration of new knowledge

Fill in the blanks and give reasons.

Use fractions to represent shaded areas and observe carefully.

The numerators and denominators of these fractions are divided by 2 at the same time, and the magnitude of the fractions does not change.

You can divide by common factors of both the numerator and the denominator.

You can directly calculate the greatest common factor 8 between 24 and 8.

The result of the last equation like this is 1/3 and cannot be divided further. This process is called approximation.

When the numerator and denominator have no common factors other than 1, the fraction is called the simplest fraction.

About PPT, the third part: classroom exercises

1. Divide the following fractions into their simplest fractions and communicate with your peers.

2. In 30 games this season, we won 18, drew 2 and lost 10.

(1) What percentage of the total number of games are the number of wins, draws and losses?

(2) Express it in the simplest form of a fraction and tell us how you reduced it.

(3) Please give another example to illustrate the reduction process and communicate with your peers.

3. Connect the answer to the riddle.

About the PPT, the fourth part: Class summary

Like this, dividing the numerator and denominator of a fraction by a common factor at the same time will keep the value of the fraction unchanged. This process is called reduction. It can no longer be divided, it is the simplest fraction.

What should you pay attention to when making an appointment? Divide by common factors of the numerator and denominator.

About the PPT, the fifth part: Classwork

1. Circle the simplest fraction and reduce the remaining fractions.

2. Fill in ○ with “＞”, “＜” or “=".

3. Mingming’s head length is 20 cm and his height is 120 cm. What fraction of Mingming’s head length is his height?

20÷120=20/120=1/6

Answer: Obviously the head length is 1/6 of the height.

Keywords: Beijing Normal University edition fifth grade mathematics volume PPT courseware free download, approximation PPT download, meaning of fractions PPT download, .PPT format;

For more information about the "Reduction of the Meaning of Fractions" PPT courseware, please click on the "Reduction of the Meaning of Fractions" PPT tab.

"Reduction" PPT courseware download on the meaning of fractions:

Download PPT courseware of "Reduced Fractions" The Significance of Fractions Part One: Exploring New Knowledge Observe carefully, what did you find? Can you describe in your own words what approximation is? Like this, if the numerator and denominator of a fraction are divided by a common factor at the same time, the value of the fraction will not...

"Reduction" PPT teaching courseware on the meaning of fractions:

"Reduction" PPT teaching courseware on the significance of fractions Part 1: Learning objectives 1. Combined with intuitive diagrams, experience the process of knowledge formation and understand the meaning of reduction. 2. Explore and master reduction methods and be able to perform reductions correctly. Key points: Understand the meaning and method of reduction...

"Reduction" PPT download of the meaning of fractions:

"Reduction" The Meaning of Fractions PPT Download Part One: Exciting Introduction Question: What are the common factors of the numerator and denominator of the following fractions? What is the greatest common factor? How did you find it? Chat with your deskmates. ... ... ... Approximate PPT, in the second part...

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Update Time: 2024-10-01

This template belongs to Mathematics courseware Beijing Normal University Edition Fifth Grade Mathematics Volume 1 industry PPT template

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