"Applications of Fractional Equations" Fraction PPT courseware

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"Applications of Fractional Equations" Fraction PPT courseware

Example 3:

Two engineering teams participated in a road construction project together. Team A completed one-third of the total project in one month. At this time, Team B was added. The two teams worked together for another half month, and the total project was completed. Which construction team is faster?

Analysis: Team A can complete _______ of the total project in one month. If Team B can complete _______ of the total project in one month, then Team A can complete _______ of the total project in half a month, and Team B can complete _______ of the total project in half a month. _______, it took the two teams half a month to complete the total project.

Example 4:

Since May 2004, the average speed of a certain train has increased v kilometers per hour. In the same time, the train traveled s kilometers before the speed increase. After the speed increase, it traveled 50 kilometers more than before the speed increase. What was the average speed of the train before the speed increase?

Analysis: The letters v and s here represent known data. Assume that the average speed of the train before speeding up is x kilometers per hour. First consider the following space:

After speeding up, the average speed of the train is (x+v) kilometers per hour,

The time it takes for the train to travel s kilometers before speeding up is s/x hours.

After speeding up, the time it takes for the train to travel (s+50) kilometers is s+50/x+v hours.

Ask students to summarize what they learned in this lesson

Summarize:

1. When solving word problems using fractional equations, you should pay attention to the five steps of problem solving.

2. The key to formulating equations is to find the equivalent relationship on the premise of accurately setting the elements (can be set directly or indirectly).

3. During the problem-solving process, pay attention to drawing pictures or lists to help analyze the meaning of the problem and find equivalent relationships.

4. Be careful not to miss the test and write the answer.

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For more information about the PPT courseware "Applications of Fractions to Fractional Equations", please click the "Applications of Fractions to Fractions ppt" tag.

"Applications of Fractional Equations" PPT courseware 3:

"Applications of Fractional Equations" PPT Courseware 3 Review Review 1. Concept of fractional equations An equation containing an unknown number in the denominator is called a fractional equation. 2. Problem-solving ideas for solving fractional equations 3. Problem-solving steps for solving fractional equations Learning objectives: 1. Be able to analyze the meaning of the problem and find equivalent quantities..

"Applications of Fractional Equations" PPT courseware 2:

"Application of Fractional Equations" PPT Courseware 2 Quote: A and B are making certain machine parts. It is known that A makes 6 more parts per hour than B. The time it takes A to make 90 parts is the same as the time it takes B to make 60 parts. If the time is equal, how many parts can A and B each make per hour? equal amount..

"Applications of Fractional Equations" PPT courseware:

Summary of the "Applications of Fractional Equations" PPT courseware: Steps and methods for solving application problems with column fraction equations: 1. Review, set up, list, solve, test, and answer 2. Find equivalent relationships Summary Summary of solving column fraction equations General steps and precautions for application questions: (1) Question review:..

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Update Time: 2024-10-01

This template belongs to Mathematics courseware People's Education Press Eighth Grade Mathematics Volume 1 industry PPT template

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