"Reconciliation" PPT download of the meaning of fractions

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"Reconciliation" PPT download of the meaning of fractions

Part One: Exciting Introduction

Question: What are the common factors of the numerators and denominators of the following fractions? What is the greatest common factor?

How did you find it? Chat with your deskmates.

About the PPT, the second part of the content: knowledge explanation

Observe carefully, what did you find?

The area of ​​the shaded part remains unchanged, but the number of parts divided becomes smaller.

Question: Express the shaded portion as a fraction.

Can you use what you learned earlier to explain this finding?

Divide both the numerator and denominator of a fraction by a common factor.

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.

A fraction whose numerator and denominator have only a common factor of 1 is the simplest fraction.

Reduction method

Successive reduction: Use the common factors of the numerator and denominator (except 1) to successively remove the numerator and denominator until a simplest fraction is obtained.

First reduction: use the greatest common factor of the numerator and denominator of the fraction to divide the numerator and denominator respectively.

About PPT, the third part: practice and consolidation

1. What percentage of the total number of games are the number of wins, draws and losses? Divide it into its simplest fraction.

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

3. Connect the answer to the riddle.

4. Fill in ○ with “＞”, “＜” or “=".

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

6. Represent the following fractions on the graph below. What do you find?

About the PPT, the fourth part: knowledge summary

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.

A fraction whose numerator and denominator have only a common factor of 1 is the simplest fraction.

Successive reduction: Use the common factors of the numerator and denominator (except 1) to successively remove the numerator and denominator until a simplest fraction is obtained.

First reduction: use the greatest common factor of the numerator and denominator of the fraction to divide the numerator and denominator respectively.

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" The meaning of fractions PPT:

"Reduction" The meaning of fractions PPT Part 1: Class 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..

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Update Time: 2024-11-20

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

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