"Scale" Graphic transformation and position determination PPT courseware 2

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"Scale" Graphic transformation and position determination PPT courseware 2

Test you: The actual distance from Nanjing to Beijing is 900 kilometers. An ant crawled from Nanjing to Beijing in less than 1 minute. Do you know what happened?

On a map, the straight-line distance from Guangzhou to Beijing was measured to be 32 centimeters. A teacher flew from Guangzhou to Beijing for a meeting, but it took 2 hours. What happened?

The ratio of the distance on the picture to the actual distance is called the scale of the picture.

Distance on the map � actual distance = scale

Distance on the map/actual distance = scale

do you know?

Scales expressed in numerical form such as 1:6000000, 1:100, 1:200, 1/6000000, 1/100, etc. are called numerical scales

Characteristics of scale

A scale is different from a general ruler in that it is a ratio without a unit of measurement;

The units of distance on the map and actual distance are the same;

The scale on the map is usually written as a ratio of the previous term being 1;

(1) Basic exercises

1. Measure the length of Xiaoxiao’s bedroom in the floor plan ( ) cm and the width ( ) cm.

The actual length of Xiaoxiao's bedroom is ( ) meters, the width is ( ) meters, and the area is ( ) square meters.

2. What is the total area of ​​Xiaoxiao’s house in square meters?

Actual distance = distance on the map ÷ scale

1. On a map with a scale of 1:2000, a distance of 1 cm on the map represents the actual distance ( ) meters.

2. On a map with a scale of 1:250000, a distance of 1 centimeter on the map represents the actual distance ( ) kilometers.

3. On a map with a scale of 1:4000000, the distance on the map is ( ) the actual distance, and the actual distance is ( ) times the distance on the map.

Multiple choice questions:

(1) Use 10 centimeters to represent the actual distance of 9 kilometers. The scale of this picture is ( ).

A 1:900000 B 1:90000 C 1:900

(2) 1:240000000 means 1 centimeter on the picture, but it is actually ( ) kilometers.

A 24 B 240 C 2400

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Update Time: 2024-09-29

This template belongs to Mathematics courseware Western Normal University Edition Sixth Grade Mathematics Volume 1 industry PPT template

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