"Surface Area of ​​a Cuboid" Cuboid (1) PPT

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"Surface Area of ​​a Cuboid" Cuboid (1) PPT

Part One: Learning Objectives

1. In the process of solving practical problems, explore the calculation method of the surface area of ​​a cuboid.

2. Master the calculation method of the surface area of ​​a cuboid and be able to solve some simple application problems.

3. Enrich the understanding of real space and develop spatial concepts.

focus

Mastering the calculation method of the surface area of ​​a cuboid can solve some simple application problems.

difficulty

Explore how to calculate the surface area of ​​a cuboid.

Surface area of ​​cuboid PPT, part 2: interpretation of examples

In the craft class, students made rectangular packaging boxes, as shown in the picture.

How much cardboard does it take to make a box like this? Tell me what you think? (Unit: cm)

When I unfold the carton, I can first find the area of ​​each side separately, and then sum it up.

The sum of the areas of the six faces of a cuboid is called its surface area.

How to calculate the surface area of ​​this rectangular box? Think about it and fill it out.

Opposite faces have equal areas.

Is there any other way?

Surface area of ​​cuboid = (length × width + length × height + width × height) × 2

S＝2（a×b＋a×h＋b×h）

Surface area of ​​cuboid PPT, part three: summary

How to calculate the surface area of ​​a cuboid

Surface area of ​​cuboid = (length × width + length × height + width × height) × 2

=2(a×b＋a×h＋b×h)

How to calculate the surface area of ​​a cube

Surface area of ​​cube = edge length × edge length × 6 = 6a2

Surface area of ​​cuboid PPT, part 4 content: quiz in class

1. How many square meters of cardboard should be used to make a microwave oven packaging box?

(0.7×0.5+0.7×0.4+0.5×0.4)×2

=(0.35+0.28+0.2)×2

=0.83×2

=1.66(m2)

Answer: Use at least 1.66 m2 cardboard.

2. A cube ink tank with an edge length of 6.5 cm. How many square centimeters of cardboard are needed to make this ink tank?

6.5×6.5×6＝42.25×6＝253.5（cm2）

Answer: You will need at least 253.5 cm2 of cardboard to make this ink tank.

3. Liangliang’s family needs to provide a simple wardrobe with a cloth cover that is 0.75 m long, 0.5 m wide, and 1.6 m high (as shown below, without a bottom). How many square meters of cloth are needed at least?

0.75×0.5＋0.5×1.6×2＋0.75×1.6×2

=0.375+1.6+2.4

=4.375(m2)

Answer: At least 4.375 m2 of cloth is required.

Surface area of ​​cuboid PPT, part 5 content: homework

1. Select from the after-class exercises;

2. Complete the exercises in this lesson in the exercise book.

Keywords: Free download of Beijing Normal University Edition fifth grade mathematics PPT courseware for volume 2, surface area of ​​cuboid PPT download, cuboid PPT download, .PPT format;

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"Surface Area of ​​a Cuboid" Cuboid (1) PPT teaching courseware:

"Surface Area of ​​a Cuboid" Cuboid (1) PPT Teaching Courseware Part One: Learning Objectives 1. During operation and observation activities, explore and understand the surface area of ​​cuboids and cubes and their calculation methods, and be able to calculate them correctly. 2. Enrich the understanding of real space,...

"Surface Area of ​​a Cuboid" Cuboid (1) PPT download:

"Surface Area of ​​a Cuboid" Cuboid (1) PPT Download Part One: Learning Objectives 1. Master the calculation method of the surface area of ​​a cuboid and a cube, and be able to calculate it correctly. (Key points) 2. Apply the calculation method of surface area of ​​cuboid and cube to solve practical problems..

"Surface Area of ​​a Cuboid" Cuboid PPT Courseware 2:

"Surface Area of ​​Cuboids" Cuboid PPT Courseware 3 Teaching Objectives 1. Knowledge and skills: During operation and observation activities, explore and understand the surface areas of cuboids and cubes and their calculation methods, and be able to calculate them correctly. 2. Process and methods: Enrich the concept of real space..

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Update Time: 2024-11-22

This template belongs to Mathematics courseware Beijing Normal University Edition Fifth Grade Mathematics Volume 2 industry PPT template

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