"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: 2024-11-19

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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;

For more information about the PPT courseware "Use letters to express numbers and letters to express formulas", please click Use letters to express numbers ppt Use letters to express formulas ppt tag.

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Update Time: 2024-11-19

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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