"Multiplying Decimals by Decimals" Multiplication and Division of Decimals PPT Courseware 3

Description

"Multiplying Decimals by Decimals" Multiplication and Division of Decimals PPT Courseware 3

Students, can you discuss and exchange the following questions together?

When calculating decimals multiplied by decimals

What to do first? Calculate the product by multiplying integers

What to do again? Add decimal point to points

How to determine the position of the decimal point? To see how many decimals there are in the factors, count them from the right side of the product and put the decimal point.

What should I do if the number of decimal places in the product is not enough? pad with 0 in front

What should I do if there is a 0 at the end of the product? Click the decimal point first, then remove the 0

Click the decimal point first, then remove the 0

47 ×0.05 ( ) 6.9 ×0.38 ( )

4.2 ×1.8 ( ) 4.08 ×0.08 ( )

0.9 ×0.7 ( ) 6 ×0.07 ( )

Compare the product and the first factor separately. What do you find?

Did you discover it?

When a number (except 0) is multiplied by a number greater than 1, the product will be greater than this number ( ); when a number (other than 0) is multiplied by a number less than 1, the product will be greater than this number ( )

I will judge

1. When two decimals are multiplied by one decimal, the product must be three decimals. ( )

2. When an integer is multiplied by a decimal, the product is smaller than this number. ( )

3. The product of decimal multiplication may be an integer. ( )

4. 15 × 0.4 means finding four-tenths of 15. ( )

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For more information about the PPT courseware "Multiplying Decimals by Decimals, Multiplication and Division of Decimals", please click the Multiplying Decimals by Decimals ppt Multiplication and Division of Decimals ppt tag.

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"Multiplying Decimals by Decimals" Decimal Multiplication PPT Courseware 4:

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Update Time: 2024-11-20

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

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