"Area of ​​Rectangles and Squares" PPT

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"Area of ​​Rectangles and Squares" PPT

Part One: Analysis of Examples

Example 1 Use 12 small squares of 1 square centimeter to form a rectangle.

Tell everyone what kind of rectangle you made.

The length of the rectangle I put together is 4 cm and the width is 3 cm.

Observing the data everyone filled in the table, what did you find?

Summarize the formula for calculating the area of ​​a rectangle yourself.

Area of ​​rectangle = length × width

Example 2 There is a rectangular billboard (as shown below). What is its area in square decimeters?

12×5＝60（dm²）

Answer: The area of ​​the billboard is ( ) square decimeters.

Areas of rectangles and squares PPT, part 2: practice

1 Calculate the area of ​​the rectangle below.

25×8＝200（dm2）

9×5=45(cm2)

2 A landscape painting is 13 decimeters long and 8 decimeters wide. What is the area of ​​this landscape painting in square decimeters?

13×8＝104（dm2）

The area of ​​this landscape painting is 104 square decimeters.

Areas of rectangles and squares PPT, part 3 content: Summary:

Area of ​​rectangle = length × width

Area of ​​a square = side length × side length

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Update Time: 2024-11-22

This template belongs to Mathematics courseware Hebei Education Edition Third Grade Mathematics Volume 2 industry PPT template

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