"My family bought a new house" PPT courseware 2

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"My family bought a new house" PPT courseware 2

1. Situation introduction

Small bedroom: 5 meters long and 4 meters wide.

How big is the small bedroom?

Restaurant: side length 4 meters.

How big is the restaurant?

Tapestry: side length 10 decimeters.

How large is the tapestry?

On and off: side length 1 decimeter.

What is the area of ​​the switch?

What mathematical information do you know from the picture?

What questions can you ask based on this information?

2. Cooperation and exploration

How big is the small bedroom?

The floor of the small bedroom is rectangular. To find its area, you need to be able to find the area of ​​the rectangle.

How to find the area of ​​a rectangle?

We study with the help of learning tools.

How to find the area of ​​a rectangle?

Use 1 square centimeter squares to cover all the rectangular pieces of paper. A total of 20 pieces were used. Its area is 20 square centimeters.

3. Independent practice

1. Calculate the area of ​​each figure below. (Unit: cm)

3×2=6（cm2） 2×2=4（cm2） 4×2=8（cm2）

2. Basketball court area: 28×15=420 (square meters)

Area of ​​the backboard: 18×11=198 (square decimeters)

3.8m2=( )dm2 400 dm2 =( )m2

200 cm2 = ( ) dm2 9dm2 = ( ) cm2

4. Pave a rectangular living room with floor tiles with a side length of 5 decimeters, exactly 10 tiles along its length, and 8 tiles along its width. What is the area of ​​the living room in square meters?

5×5 =25 (square decimeter) 5×10=50 (decimeter)

10×8=80 (blocks) 5×8=40 (decimeters)

25×80=2000 (square decimeters) 50×40=2000 (square decimeters)

2000 square decimeters=20 square meters 2000 square decimeters=20 square meters

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"My family bought a new house" PPT courseware 6:

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"My family bought a new house" PPT courseware 5:

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Update Time: 2024-10-05

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

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