"Using letters to represent formulas" PPT

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Hebei Education Edition Fourth Grade Mathematics Volume 2	pptx	6 MB

"Using letters to represent formulas" PPT

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Upload Time: 2024-10-02

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"Using letters to represent formulas" PPT

Part One: Analysis of Examples

Example 3. The school planned to use a ton of water per month, but actually saved b tons of water per month on average.

How to save water?

Let’s talk about what the following formula means.

(1)a-b (2)3a (3)3b (4)12(a-b)

(1) a - b represents the actual tons of water used per month.

(2) 3a represents the tons of water planned for three months.

(3) 3b represents the tons of water saved in 3 months.

(4) 12(a-b) represents the actual tons of water used in a year.

Use letters to represent formulas PPT, the second part of the content: formulas

Use letters to express the formulas for the perimeter and area of a square.

What does the letter a mean?

The perimeter of a square is equal to the sum of 4 a's...

The addition of 4 a’s can be written as 4a…

Perimeter of the square=a+a+a+a

Perimeter of the square = 4a

The area of the square is equal to a times a.

a×a can be written as a squared.

In mathematics, C is generally used to represent the perimeter and S represents the area. The formulas for the perimeter of a square can be written as:

C＝4a

S＝a²

Keywords: Free download of Hebei Education Edition mathematics PPT courseware for the second volume of fourth grade, using letters to represent formulas PPT download, .PPT format;

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Update Time: 2024-10-02

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Use letters to express numbers ppt Use letters to express formulas ppt

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"Using letters to represent formulas" PPT