"The law of changes in the size of decimals caused by moving the decimal point to the left" Decimal multiplication and division PPT courseware

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"The law of changes in the size of decimals caused by moving the decimal point to the left" Decimal multiplication and division PPT courseware

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"The law of changes in the size of decimals caused by moving the decimal point to the left" Decimal multiplication and division PPT courseware

Taking the group as a unit, each group randomly finds a decimal and divides it by 10, 100, and 1000 respectively. See if the change in the position of the decimal point is the same as we guessed?

1.02÷10=0.102

1.02÷100=0.0102

1.02÷1000=0.00102

Can anyone explain in one sentence the pattern you discovered?

Divide a decimal by 10, 100, 1000

…Just move the decimal point of this decimal number one, two, or three places to the left…

Fill in the appropriate numbers in the brackets and tell the group what you think.

54.2÷( )=5.42

2.17÷( )=0.0217

3.48÷( )=0.348

102.2÷( )=0.1022

10÷( )=0.1

540÷( )=0.54

teaching objectives

1. Enable students to understand and master the rules of changes in the size of decimals caused by moving the decimal point; be able to apply the rules to correctly calculate orally the quotient of dividing a number by 10, 100, 1000...

2. In the process of exploring laws, cultivate students’ preliminary abilities of observation, comparison, induction, and generalization and their interest in actively exploring mathematical laws.

Teaching Focus and Difficulties

Enable students to understand and master the rules of changes in the size of decimals caused by the movement of the decimal point.

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For more information about the PPT courseware "The rule of decimal multiplication and division caused by the change in the size of decimals caused by the movement of the decimal point to the left", please click the rule of the change of the size of decimals caused by the movement of the decimal point to the left ppt decimal multiplication and division ppt tag.

File Info

Update Time: 2024-11-10

This template belongs to Mathematics courseware Jiangsu Education Edition Fifth Grade Mathematics Volume 1 industry PPT template

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《小数点向左移动引起小数大小变化的规律》小数乘法和除法PPT课件
(1)《小数点向左移动引起小数大小变化的规律》小数乘法和除法PPT课件
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