"Application of Scale" Scale PPT Courseware 2

Description

"Application of Scale" Scale PPT Courseware 2

teaching objectives

1. Combined with the schematic diagram of the Beijing to Zhengzhou railway line, go through the process of measuring the line length and estimating the actual distance according to a given scale.

2. Able to estimate or calculate the actual distance between two places using your favorite method based on the length of the line on the map and the given scale.

3. Experience the application of the "scale" in daily life and gain practical experience in using the scale to estimate the distance between two places.

What does the scale 1:4500000 mean?

Below is part of the schematic diagram of the Beijing to Zhengzhou railway line.

Tell me what stations are on the picture?

How to measure the length of the railway between two cities in the diagram?

(1) Measure the length of the railway line from Shijiazhuang to Zhengzhou on the map, and then calculate the actual length of the railway between the two cities.

Distance on the map: actual distance = scale

Actual distance = distance on the map ÷ scale

Distance on the picture: 2 cm

Actual distance: 2÷1/21000000

=42000000 (cm)

=420 (km)

(2) Measure the length of the railway line from Beijing to Zhengzhou on the map, and then calculate the actual length of the railway between the two cities.

Distance on the picture: 3 cm

Actual distance: 3÷ 1/21000000

=63000000 (cm)

=630 (km)

practice

1. There is a map with a scale of 1:3000000.

(1) The distance from Beijing to Shijiazhuang measured on this map is about 9 centimeters. How many kilometers is the actual distance from Beijing to Shijiazhuang?

Distance on the picture: 9 cm

Actual distance: 9÷1/3000000＝27000000 (cm)

=270 (km)

Answer: The actual distance from Beijing to Shijiazhuang is about 270 kilometers.

(2) The actual distance from Xingtai to Beijing is about 390 kilometers. On this map, how many centimeters is the distance from Xingtai to Beijing?

Distance on the map: actual distance = scale

Distance on the map = actual distance × scale

Actual distance: 390 kilometers = 39,000,000 centimeters

Distance on the picture: 39000000×1/3000000=13 (cm)

Answer: The distance on the map from Xingtai to Beijing is about 13 centimeters.

2. The following is a schematic diagram of some high-speed railway lines in my country.

(1) Measure and calculate the actual length of each high-speed railway.

(2) Ask questions and answer them yourself.

In conclusion

1. Distance on the map = actual distance × scale.

2. Actual distance = distance on the map ÷ scale.

homework

Find a map of China, measure the distance between any two places on the map, and then find the actual distance.

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For more information about the "Application of Scale Rules" PPT courseware, please click on the "Scale Rules ppt Application of Scale Rules ppt" tab.

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"Application of Scale" Scale PPT courseware:

"Application of Scale" Scale PPT Courseware Teaching Objectives 1. Combined with specific examples, go through the process of measuring the length of line segments on the map and calculating the actual distance according to the scale as required. 2. To further understand the scale, you will be able to measure the length and scale of the line segments on the schematic diagram..

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Update Time: 2024-07-03

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

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