"Perimeter of Rectangle and Square" PPT courseware

Description

"Perimeter of Rectangle and Square" PPT courseware

teaching objectives

1. Experience the process of independent calculation, communication, and summary to explore the formulas for the perimeter of rectangles and squares.

2. Master the formulas for the perimeter of rectangles and squares, and be able to correctly calculate the perimeters of rectangles and squares.

3. Actively participate in mathematical activities, experience the diversity of algorithms, and gain a feeling of success.

Review old knowledge

1. What is the perimeter of a figure?

The sum of the lengths of several line segments surrounding a closed figure is called the perimeter of the figure.

2. Calculate the perimeter of the figure below.

3＋1＋3+2＝9（cm）

Explore new knowledge

1. Without measuring, calculate the perimeter of the shape on the graph paper below.

6＋3＋6+3＝18（cm）

3＋3＋3+3＝12（cm）

2. Calculate the perimeter of the rectangle and square below.

5×2＋3×2

=10+6

＝16 (meter)

(5+3)×2

=8×2

＝16 (meter)

Consolidate application

1. Carrier pigeons deliver letters.

2. A square handkerchief with a side length of 25 cm. What is its circumference in centimeters?

25×4=100 (cm)

Answer: Its circumference is 100 centimeters.

3. There is a rectangular wooden board with a length of 80 cm and a width of 50 cm. Cut off the largest square plank from this piece of wood.

(1) What is the perimeter of the sawn square plank?

50×4=200 (cm)

Answer: The circumference of the sawn square plank is 200 cm.

(2) What is the perimeter of the remaining square planks?

80-50＝30 (cm)

(50+30)×2=160 (cm)

Answer: The perimeter of the remaining square planks is 160 cm.

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For more information about the "Perimeter of Rectangles and Squares" PPT courseware, please click on the Perimeter of Rectangles and Squares ppt tab.

"Perimeter of Rectangle and Square" Flash Animation Courseware 2:

"Perimeter of Rectangle and Square" Flash Animation Courseware 2 This courseware belongs to the teaching material Flash animation courseware of Unit 6 of the third grade mathematics volume of the Hebei Education Edition on the perimeter of rectangles and squares. The content is vivid and vivid, please download! Keywords: rectangle and square..

"The Relationship between Length, Width and Perimeter" Perimeter of Rectangle and Square Flash animation courseware:

"The Relationship between Length, Width and Perimeter" Perimeter of Rectangle and Square Flash Animation Courseware This courseware belongs to Hebei Education Edition Third Grade Mathematics Volume 1 Unit 6 Teaching Materials Perimeter of Rectangle and Square The Relationship between Length, Width and Perimeter Flash Animation Courseware, vivid content,...

"Perimeter of Rectangle and Square" Flash animation courseware:

"Perimeter of a Rectangle and a Square" Flash animation courseware This courseware is a teaching material Flash animation courseware on the perimeter of a rectangle and a square in Unit 6 of the third grade mathematics volume of the Hebei Education Edition. The content is vivid and vivid, please download it! Keywords: rectangular and square..

File Info

Update Time: 2024-10-03

This template belongs to Mathematics courseware Hebei Education Edition Third Grade Mathematics Volume 1 industry PPT template

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