"Fractions and Division" PPT courseware on the meaning of fractions (Lesson 2)

Description

"Fractions and Division" PPT courseware on the meaning of fractions (Lesson 2)

Part One: Learning Objectives

1. Review the relationship between fractions and division, be able to use fractions to express the quotient of dividing two numbers, and solve related practical problems.

2. Cultivate observation, comparison, abstraction, generalization and other abilities.

focus

Be able to use fractions to express the quotient of dividing two numbers and solve related practical problems.

difficulty

Be able to use fractions to express the quotient of dividing two numbers and solve related practical problems.

Fractions and Division PPT, Part 2: Interpretation of Examples

What fraction of the length of the blue paper is the length of the red paper? The naughty idea is as follows, can you understand it?

Use the blue paper strip to measure the red paper strip, exactly three times. The length of the blue paper strip is 1/3 of the red paper strip.

This problem can be calculated directly by division, 1÷3=1/3.

What fraction of the length of the yellow paper is the length of the red paper?

The yellow paper strip is longer than the red paper strip, and the result is greater than 1.

It can be calculated by division, 4÷3=4/3.

Typical examples

【Example 1】Fill it in.

The number of ducklings is the number of puppies ( ),

The number of puppies is the number of ducks ( ).

【Example 2】The number of pine trees is ( )/( ) of poplar trees,

The number of poplar trees is ( )/( )

Fractions and Division PPT, Part 3: Summary

way of solving the problem

One number ÷ another number = one number / another number, that is, comparative quantity ÷ standard quantity = comparative quantity / standard quantity,

The obtained quotient represents the relationship between two numbers without unit names.

Fractions and division PPT, part 4: quiz in class

1. Express the quotient of division as a fraction.

2÷5= 8÷3=

2. The number of kittens is the number of small fishes ( ), and the number of small fishes is the number of kittens ( ).

Fractions and Division PPT, Part 5: Homework

1. Select from the after-class exercises;

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

Keywords: Free download of Beijing Normal University Edition fifth grade mathematics PPT courseware for volume 1, fractions and division PPT download, meaning of fractions PPT download, .PPT format;

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

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Update Time: 2024-11-22

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

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