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Category | Format | Size |
---|---|---|
Qingdao Edition Sixth Grade Mathematics Volume 2 | pptx | 6 MB |
Description
"Mathematics in Beer Production" PPT Courseware 2
1. Situation introduction
What is the relationship between the tons produced per day and the number of days required for production?
What mathematical information did you learn from the table?
What questions can you ask based on this information?
2. Cooperation and exploration
The number of tons produced per day and the number of days required for production are two related quantities.
As the number of tons produced per day changes, the number of days required for production also changes.
100×60=6000 200×30=6000 The total tonnage produced remains unchanged.
The total tonnage remains unchanged, that is, the product of the tonnage produced per day and the number of days required for production is constant. We say that the number of tons produced per day and the number of production days required are inversely proportional, and their relationship is called an inversely proportional relationship.
The inverse proportional relationship can be expressed by a letter relationship: xy=k (certain)
3. Independent practice
1. For an article, the editor designed the following layout schemes.
Is the number of words per page inversely proportional to the number of pages? Why?
inversely proportional
Number of words per page × number of pages = total number of words (certain)
2. Determine whether the following two quantities are inversely proportional. Why?
The brewery wants to transport a batch of beer. The transportation situation is as follows:
Inversely proportional. The tonnage transported each time × the number of shipments = total tonnage (certain)
Disproportionate. Tonnage transported + remaining tonnage = total tonnage (certain)
The total quantity is also constant. As one quantity increases, the other quantity becomes smaller. Why is one inversely proportional and the other disproportionate?
How to determine whether two quantities are inversely proportional? What is the key to judgment?
4. Determine whether the two quantities in the following questions are inversely proportional, and explain your reasons.
(1) The total amount of coal is fixed, the amount of coal burned every day and the number of days it is burned
Inversely proportional to the amount of coal burned per day × the number of days burned = the total amount of coal (certain)
(2) The area of a rectangle is certain, and its length and width
Inversely proportional length × width = area of rectangle (certain)
(3) The school plans to plant 500 trees, the trees that have been planted and the trees that have not been planted
Disproportionate: Planted trees + Unplanted trees = Total trees (certain)
(4) The plane flies from Beijing to Shanghai, the flight speed and the required time
Inversely proportional to speed × time = total distance (certain)
Keywords: Mathematics teaching courseware in beer production, Qingdao edition sixth grade mathematics second volume PPT courseware download, sixth grade mathematics slide courseware download, mathematics in beer production PPT courseware download, .PPT format;
For more information about the "Mathematics in Beer Production" PPT courseware, please click the Mathematics in Beer Production ppt tab.
"Mathematics in Beer Production" PPT courseware 8:
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"Mathematics in Beer Production" PPT courseware 7:
"Mathematics in Beer Production" PPT courseware 7 1. Situation introduction 2 boxes can hold 24 bottles of beer. There are currently 480 bottles of beer. How many boxes are needed? A batch of beer is transported by 8-ton trucks, which requires 15 trucks; now it is transported by 10-ton trucks. How many cars are needed? from..
"Mathematics in Beer Production" PPT courseware 6:
"Mathematics in Beer Production" PPT courseware 6 1. Situation introduction Speed: 100 kilometers/hour Scale 1:8000000 How many hours does it take for the Young Eagle Youth Football Team to arrive in Qingdao? What mathematical information do you know from the picture? Based on this information, what can you suggest...
File Info
Update Time: 2024-09-30
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