| Category | Format | Size |
|---|---|---|
| Beijing Normal University Edition Eighth Grade Mathematics Volume 1 | pptx | 6 MB |
"Application of linear equations of two variables - Numbers on milestones" PPT courseware of linear equations of two variables 2
Description
"Application of linear equations of two variables - Numbers on milestones" System of linear equations of two variables PPT courseware 2
think about it
Xiao Ming's father rides a motorcycle with Xiao Ming on the road at a constant speed. The picture below shows the mileage that Xiao Ming sees every hour. Can you determine the number on the milestone that Xiao Ming saw at 12:00?
What is the relationship between the distance traveled by motorcycles between 12:00~13:00 and 13:00~14:00? Can you list the equation?
(10x+y)-(10y+x)= (100x+y)—(10y+x)
What are the general steps for solving practical problems with a system of linear equations in two variables?
(1) Clarify the meaning of the question and the equivalence relationship in the question, and use letters to represent the two unknown numbers in the question.
(2) Find two equivalent relationships that can express the full meaning of the word problem.
(3) List two equations respectively based on two equivalence relationships and form a system of equations.
(4) Solve the system of equations and find the values of the unknowns.
(5) Check whether the obtained results are reasonable based on the actual significance of the application questions.
(6) Write an answer that fits the meaning of the question and answer it.
practice
From a two-digit number, subtract three times the sum of its digits. The result is 23 divided by the sum of its digits. The quotient is 5 and the remainder is 1. What is this two-digit number?
Solution: Let the two-digit tens-digit number be x and the single-digit number be y. Then according to the meaning of the question:
10x+y-3(x+y)=23
5(x+y)+1=10x+y
Solution: X=5 Y=6
Answer: The two-digit number is 56.
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For more information about the PPT courseware "Numbers on Milestones of Applying Linear Equations of Two Variables to Systems of Linear Equations of Two Variables", please click on the Numbers PPT tag on Milestones of Applying Linear Equations of Two Variables to Linear Equations of Two Variables.
"Application of linear equations of two variables - Numbers on milestones" PPT teaching courseware of linear equations of two variables:
"Numbers on Milestones of Application of Linear Equations of Two Variables" PPT teaching courseware for linear equations of two variables, 12 pages in total. Part One: Basic Knowledge Points Knowledge Points Solving Problems of a System of Linear Equations in Two Variables 1. A car starts from point A and travels eastward through a cross...
"Application of linear equations of two variables - Numbers on milestones" PPT download of linear equations of two variables:
"Numbers on Milestones in Application of Linear Equations of Two Variables" PPT download of linear equations of two variables, 28 pages in total. Part One: Learning Objectives 1. Use linear equations of two variables to solve numerical problems and travel problems. (Key points) 2. Further experience and experience in solving systems of equations..
"Application of linear equations of two variables - Numbers on milestones" PPT of linear equations of two variables:
"Numbers on Milestones in Application of Linear Equations of Two Variables" PPT of Linear Equations of Two Variables, 26 pages in total. Part I: Numerical Problems Basic relational expressions: (1) A three-digit number, the hundreds digit is c, the tens digit is b, and the ones digit is a, then the three-digit number can be expressed as...
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Update Time: 2024-07-11
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