"Changes in Decimal Size Caused by Movement of Decimal Point Position" Decimal PPT Courseware

Description

"Changes in Decimal Size Caused by Movement of Decimal Point Position" Decimal PPT Courseware

teaching objectives

In this lesson, we will study the impact of the movement of the decimal point on the size of decimals. Students use their brains to explore the rules themselves and see who can summarize the most accurately.

Compare, what did you find?

(1) The four pictures all divide ( ) equally into ( ).

(2) How many copies of each of the four pictures were taken?

The first picture took ( ) parts; the second picture took ( ) parts; the third picture took ( ) parts; the fourth picture took ( ) parts.

(3) What is the relationship between the numbers of the four pictures?

The second picture is ( ) times that of the first picture;

The third picture is ( ) times that of the second picture.

The fourth picture is ( ) times that of the third picture.

As the decimal point moves to the right, the size of the decimal changes

If the decimal point is moved one place to the right, the original number will be expanded by 10 times;

Move the decimal point two places to the right, and the original number will expand 100 times;

If the decimal point is moved three places to the right, the original number will be expanded 1000 times;

1. Judgment

1. Move the decimal point of 0.8 three places to the right, and the original number will be reduced to 1/1000 of it ( )

2. 3.69 expanded 1000 times is 36.9. ( )

3. To reduce a number by 10 times, move the decimal point of the number one place to the left. ( )

2. Observe three numbers. Can you find the changing relationship between them?

3.8 38 0.038

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"Changes in Decimal Size Caused by Movement of Decimal Point Position" Decimal PPT Courseware 2:

"Changes in the size of decimals caused by the movement of the decimal point position" Decimal PPT Courseware 2 Teaching Objectives In this lesson, we mainly study the changes in the size of decimals caused by the movement of the decimal point position. Students must be able to master the law of this change and solve related practical problems. think..

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Update Time: 2024-10-02

This template belongs to Mathematics courseware Western Normal University Edition Fourth Grade Mathematics Volume 2 industry PPT template

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