| Category | Format | Size |
|---|---|---|
| People's Education Press Sixth Grade Mathematics Volume 2 | pptx | 6 MB |
"Mathematics in Bicycles" Proportion PPT
Description
"Mathematics in Bicycles" Proportion PPT
Part One: Learning Objectives
1. Comprehensively apply the knowledge you have learned about circles, arrangements, proportions, etc. to solve common practical problems related to bicycles in life.
2. Experience the basic process of problem solving and learn how to use mathematical knowledge to solve practical problems.
Mathematics in Bicycles PPT, Part 2: Activity Drills
Activities
Math in Bicycles.
Event preparation
Regular bicycles, variable speed bicycles, tape measures, etc.
activity procedure
Activity 1 Find an ordinary bicycle and measure the following data.
How far can this bicycle go in one cycle?
Use the proportion knowledge you learned earlier and give it a try!
Think about it: What is the relationship between the number of teeth on the front and rear gears and their rotational speed?
The front gear rotates 2 teeth and 10 teeth, how does the rear gear move? What is the relationship between the number of revolutions of the front and rear gears and their number of teeth?
Activity 2 Find a variable-speed bicycle, measure the number of teeth on the front and rear gears, and see how many combinations there are.
Which combination makes the bike go the farthest for the same number of pedaling laps?
1. Count the number of teeth on the front and rear gears of a transmission bicycle and complete the table.
2. Explore the problem.
3. Solve the problem.
Because the 24:7 ratio is the largest of all ratios, the combination of a front gear with 48 teeth and a rear gear with 14 teeth takes the bike the farthest.
4. Summary of activities.
(1) The maximum number of different speeds that a variable-speed bicycle can change = the number of front gears × the number of rear gears. (The same speed is only counted as one type)
(2) The more the number of teeth of the front gear, the fewer the number of teeth of the rear gear. That is, the greater the ratio of the number of teeth of the front gear/the number of teeth of the rear gear. The farther the bicycle travels with the same number of revolutions.
Keywords: Free download of PPT courseware for mathematics in the second volume of the sixth grade of the People's Education Press, download of Mathematics in Bicycles PPT, download of proportion PPT, .PPT format;
For more information about the PPT courseware "Mathematics in Proportional Bicycles", please click on the Mathematics in Proportional PPT Bicycles PPT tab.
File Info
Update Time: 2024-07-03
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