"The Size of Fractions" PPT teaching courseware on the meaning of fractions

Description

"The Size of Fractions" PPT teaching courseware on the meaning of fractions

Part One: Learning Objectives

1. Explore methods for comparing fractions and correctly compare two fractions with different denominators.

2. Understand the meaning of general division and master the method of general division.

focus

Will correctly compare the magnitude of two fractions with different denominators.

difficulty

Understand the meaning of common points and master the methods of common points.

PPT on the size of fractions, part 2: interpretation of examples

Which one has the larger area, the playground or the dormitory building?

The key depends on which one is bigger, 2/7 or 1/6.

I would compare if the denominator or numerator is the same, but the two fractions have the same denominator and numerator.

How to compare the size of two fractions?

Method 1: Draw pictures to compare.

Method 2: Convert into fractions with the same denominator.

The process of converting a fraction with different denominators into a fraction that is equal to the original fraction and has the same denominator is called a common fraction.

The playground covers a large area.

The size of fractions PPT, the third part: typical examples

[Example 1] Compare the size of two scores in each group.

[Example 2] Xiao Ming and Xiao Gang each have the same story book. Who has read the most?

I read 4/7 of this book.

I read 1/2 of this book.

The size of fractions PPT, the fourth part: summary

common method

Use the common multiples of the denominators of the original fractions as the denominator. In order to simplify the calculation, the lowest common multiple is usually used as the common denominator, and then each fraction is converted into a fraction using the lowest common multiple as the denominator.

PPT on the size of fractions, part 5: quiz in class

1. Write the lowest common denominator of each group of fractions directly in parentheses.

2. I am a little judge.

(1) A common fraction is to convert two fractions with different denominators into a fraction with the same denominator, and the fraction value remains unchanged. ()

(2) After dividing the two fractions together, they are both greater than the original fractions. ()

(3) The fraction of molecules with larger molecules is relatively large, and the fraction of molecules with small molecules is relatively small. ()

(4) The numerators are the same, the fraction with a larger denominator is smaller, and the fraction with a smaller denominator is larger. ()

(5) The basis of general scores is the basic properties of fractions. ()

3. A new round of the tortoise and the hare has begun. The track is 1,000 meters long. Who is running in front now?

The size of fractions PPT, part six: homework

1. Select from the after-class exercises;

2. Complete the exercises in this lesson in the exercise book.

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

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

"The Size of Fractions" PPT courseware download on the meaning of fractions:

"The Size of Fractions" The meaning of fractions PPT courseware download

Part 1: Review old knowledge

fill in the blank.

(1) The least common multiple of 3 and 5 is ( ).

(2) The least common multiple of 2, 3 and 4 is ().

(3) 6 and 9..

"The Size of Fractions" PPT download of the meaning of fractions:

"The Size of Fractions" The meaning of fractions PPT download

Part One: Exciting Introduction

Question: Compare the two numbers in each set. and explain the reasons.

If the denominators are the same, the one with the larger numerator is larger.

How to compare fractions with different denominators...

"The Size of Fractions" The meaning of fractions PPT:

"The Size of Fractions" The meaning of fractions PPT

Part One: Classroom Introduction

1. Understand and master the method of comparing two fractions with the same denominator or the same numerator.

2. Deepen your understanding of the meaning of fractions while learning how to compare fractions..

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Update Time: 2024-11-19

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

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