"Observing Three Dimensions" Observing Objects PPT Courseware 2

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Hebei Education Edition Second Grade Mathematics Volume 1	pptx	6 MB

"Observing Three Dimensions" Observing Objects PPT Courseware 2

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Upload Time: 2024-11-25

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Description

"Observing Three Dimensions" Observing Objects PPT Courseware 2

teaching objectives

1. Experience the process of observing three-dimensional objects such as cuboids, cubes and balls from different positions.

2. Be able to identify the plane figures seen when observing three-dimensional objects from the front, side and above.

3. In mathematical activities such as observation, operation, imagination, and communication, feel the connection between three-dimensional and two-dimensional figures and develop students' preliminary spatial concepts.

Observe the cookie box.

From which direction are the three people looking?

Talk about it

Who saw the three pictures below?

Observe the cube and the ball.

Think about it: What do you see when you look at them from the front, the side, and above?

Regardless of whether it is viewed from the front, side or top, the shape seen from the cube is the same square shape. The shape of the ball seen from the front, side and above is the same circle.

practice

1. From which direction of the cuboid are the three figures on the right seen?

2. First determine which cuboid the figure is seen from, and then paint it with the corresponding color.

3. Make different marks on the front, sides and top of a rectangular paper box and cut it open.

Mark the opposite faces using the same figure.

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For more information about the PPT courseware "Observing Objects and Observing Three-Dimensions", please click the Observing Objects ppt and Observing Three-Dimensions ppt tag.

"Observing Three Dimensions" Observing Objects PPT Courseware:

"Observing Three-Dimensions" Observing Objects PPT Courseware Review Children, do you still remember these three-dimensional figures? Cuboid Cube Cylinder Sphere Today we continue to study the knowledge about three-dimensional figures. Who saw the three pictures on the right below? (1) Observation...

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Update Time: 2024-11-25

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"Observing Three Dimensions" Observing Objects PPT Courseware 2