| Category | Format | Size |
|---|---|---|
| People's Education Press Mathematics Volume 2 for Sixth Grade | pptx | 6 MB |
"Application of Proportion" Proportion PPT Courseware 2
Description
"Application of Proportion" Proportion PPT Courseware 2
1. Review old knowledge
The ratio of the distance on the picture to the actual distance in a picture is called the scale of the picture.
What are the forms of scales? How to find the scale of a picture?
2. Explore new knowledge
Below is a schematic map of Beijing's rail transit routes. The length of Metro Line 1 from Pingguoyuan Station to Sihuidong Station in the picture is about 7.8 cm. How many kilometers is the actual length from Pingguoyuan Station to Sihuidong Station?
3. Application of knowledge
A model of the Leaning Tower of Pisa made at a scale of 1:100 is 54.5 centimeters high. How many meters is the actual height of the Leaning Tower of Pisa?
In production, sometimes because machine parts are relatively small, it is necessary to expand the actual size to a certain multiple before drawing it on the drawing. The picture on the right is a cross-sectional view of a machine part drawn at a scale of 6:1. What is the actual length of the outer diameter of this part in millimeters?
The picture on the right is a floor plan of a building drawn at a scale of 1:4000. What is the actual square footage of this building?
Tip: To find the floor area, we can first find the actual length and width of the rectangle.
3. Assign homework
Homework: Do it on page 54; Exercise 10 on page 57, questions 5 and 6; Exercise 10 on page 58, question 12.
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For more information about the "Application of Proportions and Proportions" PPT courseware, please click on the "Proportions ppt Application of Proportions ppt" tab.
"Application Exercises of Proportion" PPT courseware of direct proportion and inverse proportion:
"Application Exercises of Proportion" PPT Courseware of Direct Proportion and Inverse Proportion Teaching Objectives 1. Through review, students can master the knowledge of proportion more skillfully and be able to solve some practical problems. 2. Cultivate students’ interest and ability to summarize and organize knowledge independently. ... ... ...
"Application of Proportion" Proportion PPT Courseware 7:
"Application of Proportion" Proportion PPT Courseware 7 1. What is proportion? An expression that expresses two equal ratios is called a proportion. 2. What is the basic property of proportion? In proportion, the product of two external terms is equal to the product of two internal terms. 3. What is the solution to proportion? Find the proportion of...
"Application of Proportion" Proportion PPT Courseware 6:
"Application of Proportion" Proportion PPT Courseware 6 1. Review old knowledge (1) Judgment Determine whether two related quantities are proportional? In what proportion? Give reasons. (1) The total distance, speed and time are certain. ( ) (2) The total number of pages is certain, the number of pages read and the remaining...
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Update Time: 2024-07-03
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