"The Law of Change of Product" Three-digit times two-digit PPT courseware

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"The Law of Change of Product" Three-digit times two-digit PPT courseware

When two numbers are multiplied, one factor remains unchanged, the other factor is multiplied by a certain number (except 0), and the product is multiplied by a certain number.

When two numbers are multiplied, one factor remains unchanged, the other factor is divided by a number (except 0), and the product is also divided by a number.

When two numbers are multiplied, one factor remains unchanged, the other factor is multiplied (or divided) by what number (except 0), and the product is also multiplied (or divided) by what number.

judge

1. When one factor is multiplied by 8, to keep the product unchanged, the other factor must also be multiplied by 8. ( )

2.18×42=756. If 18 is divided by 2 and 42 is multiplied by 2, the product is still 756. ( )

3. If a number is multiplied by 5 and then divided by 5, the result is still the same number. ( )

4. If one factor is expanded 7 times and the other factor is reduced 7 times, their product remains unchanged. ( )

5. From 75×6=450, we know (75×2)×(6×2)=450. ( )

Thoughts after class:

1. When two factors are multiplied together, how will the product change when the two factors are multiplied at the same time?

2. When two factors are multiplied together, how will the product change when the two factors are divided at the same time?

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For more information about the PPT courseware "The Changes of the Product of Three Digits Multiplied by Two Digits", please click the Change Rules of the Product of Three Digits Multiplied by Two Digits ppt ppt tag.

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Update Time: 2024-11-22

This template belongs to Mathematics courseware Jiangsu Education Edition Fourth Grade Mathematics Volume 2 industry PPT template

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