"From Calculation to Equation" PPT courseware 2 for linear equations of one variable

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"From Calculation to Equation" PPT courseware 2 for linear equations of one variable

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"From Calculation to Equation" PPT courseware 2 for linear equations of one variable

The time for the car to drive through Wangjiazhuang, Qingshan and Xiushui at a constant speed is as shown in the table. Cuihu is between Qingshan and Xiushui, 50 kilometers away from Qingshan and 70 kilometers away from Xiushui. How far is the distance from Wangjiazhuang to Cuihu?

Can you solve this practical problem using arithmetic?

50+70/15-13×(13-10)+50

think

Can you list any other equations for the above problem? If so, which equality relationship do you rely on?

Think about the process of formulating equations?

Let letters represent unknown numbers--Find the equivalence relationship in the problem--Write the equation containing the unknown numbers

Example explanation

Example 1 According to the following problem, set up parallel equations with unknown numbers:

(1) A computer has been used for 1700 hours and is expected to be used for another 150 hours per month. How many months will it take for the computer to reach the required maintenance time of 2450 hours?

Solution: (1) Suppose the usage time of this computer reaches 2450 hours after x months, then this computer has been used for 150x hours in x months.

List of equations 1700+150x=2450

It contains only one unknown number (element) x, and the known number of the unknown number x is 1 (degree). Such an equation is called a linear equation of one element.

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For more information about the PPT courseware "Linear Equations of One Variable from Calculations to Equations", please click the "Linear Equations of One Variable PPT From Calculations to Equations ppt" tag.

"From Calculation to Equation" PPT courseware 4 of linear equations of one variable:

"Linear Equations of One Variable" PPT courseware Which of the following formulas is the equation 32x+45y 12x+15y=40 7520 19x+45=64 x+y-7z=18 X+y12 Definition: An equation containing unknown numbers is called an equation. Example 1: Use a piece of wire 24cm long to form a square...

"From Calculation to Equation" PPT courseware 3 for linear equations of one variable:

"From Calculations to Equations" PPT courseware for linear equations of one variable 3 Teaching objectives 1. Understand the definition of equations and solutions to linear equations of one variable. 2. Be able to find equivalence relationships and list equations. Example 1 According to the following questions, suppose that the unknowns are List equation (1) for a computer..

"From Formulas to Equations" PPT courseware for linear equations of one variable:

"From Calculation to Equation" PPT courseware for linear equations of one variable. Do you know what an equation is? Equations with Unknowns Can you give some examples of equations? Exercise: 1. Determine whether the following expression is an equation, mark it if it is correct, mark x if it is wrong. (1) 1+2=3 ..

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Update Time: 2024-10-19

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"From Calculation to Equation" PPT courseware 2 for linear equations of one variable
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