"Application of linear equations of two variables - chicken and rabbit in the same cage" linear equations of two variables PPT

Description

"Application of linear equations of two variables - chicken and rabbit in the same cage" PPT of linear equations of two variables, 22 pages in total.

Part One: Learning Objectives

1. Be able to list a system of linear equations of two variables to solve simple practical problems based on the quantitative relationship of specific problems. (emphasis)

Application of linear equations of two variables PPT, part 2: teaching new lessons

Applying linear equations of two variables to solve ancient arithmetic problems

The algorithm in "Sun Tzu Suan Jing" mainly takes advantage of the fact that the number of feet of rabbit and chicken is 4 and 2 respectively, and 4 is a multiple of 2. However, when other problems are transformed into this kind of problem, the number of feet is not necessarily 4. and 2, the above calculation method will not work.

In conclusion

Steps to solve word problems using equations

1. Review the question (find the equivalent relationship)

2. Assume unknown numbers

3. Make equations

4. Solve equations

5. Check and answer

Key: Find equivalence relations and form equations

Apply the chicken and rabbit in the same cage PPT with linear equations of two variables, the third part: practice in class

1. A cricket has 6 legs, and a spider has 8 legs. There are 10 crickets and spiders in total, with a total of 68 legs. If there are x crickets and y spiders, then the system of equations is __________ .

2. Use a rope to surround a big tree. If it goes around the tree 3 times, the rope will be 4 feet longer. If it goes around the tree 4 times, the rope will be 3 feet shorter. How long is this rope? How many feet does it take to go around a big tree? List only systems of equations.

3. Two people A and B are racing. If B runs 10 meters first, A can catch up with B in 5 seconds; if B runs 2 seconds first, then A can catch up with B in 4 seconds. Let A's speed be x meters / second, the speed of B is y meters/second, then the system of equations that can be formulated is ( ).

Application of linear equations of two variables: Chicken and rabbit in the same cage PPT, Part 4 content: Class summary

System of equations to solve problems

General steps:

review, set up, list, explain, test, answer

Key: Find the equivalent relationship

Keywords: Free download of the Beijing Normal University version of eighth-grade math PPT courseware for the first volume, PPT download of chicken and rabbit in a cage using linear equations of two variables, PPT download of linear equations of two variables, .PPT format;

For more information about the PPT courseware "A system of linear equations of two variables and the application of linear equations of two variables, a chicken and a rabbit in the same cage", please click the PPT tag of a system of linear equations of two variables and the application of a system of linear equations of two variables and a chicken and a rabbit in the same cage.

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Update Time: 2024-09-04

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