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

Description

"Changes in Decimal Size Caused by Movement of 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 grasp the rules of this change and solve related practical problems.

Think about it: compare the sizes of these numbers 23.45, 234.5, 2.345, 2345, and arrange them in order from small to large?

Looking at these numbers, what similarities can you find between them?

Are there any differences?

The position of the decimal point is different, and the size of the decimal is different!

Discuss: What changes have occurred in the positions of the decimal points of these four decimals?

What is the relationship between the movement of the decimal point position and the change in the size of the decimal?

Can you sum up in one sentence what is the pattern of the movement of the decimal point position and the change of the decimal size?

Move the decimal point of a decimal one, two, or three places to the right (or left)...the original decimal will expand (or shrink) 10 times, 100 times, 1000 times...

practise:

1. Move the decimal point to the right ( ) place, and the original number will be ( ) 100 times.

2. Move the decimal point to the left ( ) place, and the original number will be ( ) 100 times.

3.0.3 0.003, the decimal point moves two places toward ( ), and the original number is ( ) times ( ).

4. Remove the decimal point of 8.05, which means moving the decimal point to ( ) by ( ) places, that is, ( ) times the original number.

5. Move the decimal point of 8.07 two places to the left and four places to the right. The result is ( ), which is ( ) times the original number ( ).

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

"Changes in the size of decimals caused by the movement of the decimal point" Decimals PPT courseware Teaching objectives In this lesson, we will learn 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, you will find...

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Update Time: 2024-10-18

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

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