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

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

Part One Content: Knowledge Explanation

(1) 6×2＝12 (2) 20×4＝80

6×20＝120 10×4＝40

6×200=1200 5×4=20

In question group (1), if questions 2 and 3 are compared with question 1, the second factor is multiplied by 10 and (100) respectively. What is the change in the product?

In group (2) of questions, questions 2 and 3 are compared with question 1. The first factor is divided by 2 and (4) respectively. What is the change in the product?

Can you fully explain how the factors and products change?

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

The law of change of product PPT, the second part of the content: practice and consolidation

Calculate the first equation in each group, and then fill in the equation according to the change pattern of the product.

18 × 24＝

(18÷2)×(24×2)＝

(18×2)×(24÷2)＝

105 × 45＝

(105×3)×(45÷3)＝

(105÷5)×(45×5)＝

The change law of product PPT, the third part of the content: knowledge summary

Classmates, what knowledge have you learned in this class?

If one factor remains unchanged and the other factor is multiplied by something, the product will also be multiplied by something.

One factor remains unchanged, the other factor is divided by a number (except 0), and the product is also divided by a number (except 0).

Keywords: Free download of PPT courseware for fourth-grade mathematics from the People's Education Press, PPT download of the changing law of product, PPT download of three-digit times of two-digit numbers, .PPT format;

For more information about the PPT courseware "The Change Pattern of the Product of Three-Digit Times Two-Digit Numbers", please click on the Change Rules of the PPT Product of Three-Digit Times Two-Digit Numbers PPT tab.

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"The Law of Change of Product" Three-digit times two-digit PPT courseware 2:

"The law of change of product" Multiplying three-digit numbers by two-digit PPT courseware 2 Oral calculation 62=12 64=24 620=120 6200=1200 Observation: Please choose two calculations to compare and see how their factors change? How does the product change? ... ... ... The rule of change of product...

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Update Time: 2024-12-11

This template belongs to Mathematics courseware People's Education Press Fourth Grade Mathematics Volume 1 industry PPT template

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