Western Normal University Edition First Grade Mathematics Volume 1
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People's Education Press First Grade Mathematics Volume 1
People's Education Press Second Grade Mathematics Volume 1
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Hebei Education Edition Third Grade Mathematics Volume 1
Beijing Normal University Edition Seventh Grade Mathematics Volume 2
Beijing Normal University Edition Fifth Grade Mathematics Volume 1
Qingdao Edition Seventh Grade Mathematics Volume 1
Hebei Education Edition Seventh Grade Mathematics Volume 2
Beijing Normal University Edition Eighth Grade Mathematics Volume 1
People's Education High School Mathematics Edition B Compulsory Course 2
Jiangsu Education Edition Fourth Grade Mathematics Volume 1
People's Education Press First Grade Mathematics Volume 2
Qingdao Edition Seventh Grade Mathematics Volume 2
Beijing Normal University Edition Fifth Grade Mathematics Volume 2
Category | Format | Size |
---|---|---|
Beijing Normal University eighth grade first volume mathematics | pptx | 6 MB |
Description
"Solving a system of linear equations in two variables" A system of linear equations in two variables PPT courseware 2
learning target
1. Understand the basic idea of addition, subtraction and elimination, and initially embody the reduction idea of "turning the unknown into the known" in mathematical research.
2. Clearly explain the steps for solving a system of linear equations in two variables.
3. Understand the idea of "elimination" in solving linear equations of two variables.
What are the steps to solve a system of equations using the substitution method?
The main steps:
Deformation - using an algebraic expression containing an unknown number to express another unknown number
Substitute - eliminate one element
Solve-Find the values of two unknowns respectively
Write Solution - Write the solution to the system of equations
Solve systems of equations using addition and subtraction:
2x+3y=12
3x+4y=17
Analysis: When the two equations in the system of equations do not have the above characteristics, the equality property must be used to change the form of the equations in the system of equations, that is, a new equation that has the same solution as the original system of equations and has the same absolute value of an unknown coefficient is obtained. group, thereby creating conditions for solving the system of equations by the addition, subtraction, and elimination elements method.
[Analysis] ①×3: 6x+9y=36 ③
②×2: 6x+8y=34 ④
③-④: y=2
Substitute y=2 into ①,
Solution: x=3
So the solution to the original system of equations is x=3 y=2
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For more information about the PPT courseware "Solving a system of linear equations in two variables from a system of linear equations in two variables", please click the "Solving a system of linear equations in two variables ppt" tag.
"Solving Systems of Linear Equations in Two Variables" System of Linear Equations in Two Variables PPT Courseware 4:
"Solving Systems of Linear Equations in Two Variables" System of Linear Equations in Two Variables PPT Courseware 4 Thinking What are the characteristics of these previous systems of equations? What is the basic idea of solving this type of system of equations? What are the main steps? Features: The absolute values of the coefficients of a certain unknown number are the same. Basic idea: addition, subtraction, elimination..
"Solving Systems of Linear Equations in Two Variables" System of Linear Equations in Two Variables PPT Courseware 3:
"Solving a system of linear equations in two variables" System of linear equations in two variables PPT courseware 3 Review and thinking Do you still remember the following question? Yesterday, 8 of us went to Hongshan Park to buy tickets and spent 34 yuan. Each adult ticket was 5 yuan each. A child ticket costs 3 yuan. How many adults and how many...
"Solving Systems of Linear Equations in Two Variables" PPT courseware for systems of linear equations in two variables:
"Solving a system of linear equations in two variables" A system of linear equations in two variables PPT courseware Learning objectives 1. Master the steps of using the substitution method to solve a system of linear equations in two variables. 2. Be proficient in using the substitution method to solve simple systems of linear equations of two variables. 3. Cultivate students' analytical skills and be able to quickly analyze the information given..
File Info
Update Time: 2024-10-01
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