"I'm Getting Fat" Univariate Linear Equation PPT Courseware 2

"I'm Getting Fat" Univariate Linear Equation PPT Courseware 2

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"I'm Getting Fat" Univariate Linear Equation PPT Courseware 2

What happens to the plasticine in the teacher's hand before and after hand pressing? Have you found an equality relationship? Can you tell everyone in your own words?

1. Got fatter and shorter. (That is, the height and base radius have changed.)

2. The volume and weight remain unchanged before and after hand pressing.

Example 2 A 10-meter-long wire is used to surround a rectangle. (1) If the length of the rectangle is 1.4 meters longer than the width, how many meters are the length and width of the rectangle?

Solution: Assume that the width of the rectangle at this time is x meters, and the length is (x+1.4) meters,

According to the question:

2 (x+x+1.4) = 10

Solving for x = 1.8

x+1.4 = 3.2

Answer: Assume that the length of the rectangle at this time is 3.2 meters and the width is 1.8 meters.

summary

1. Volume before forging = volume after forging

2. The key to formulating equations is to correctly find the equivalence relationship.

3. When the length of a line segment is constant, no matter what shape it forms, the perimeter remains unchanged.

4. When the perimeter of the rectangle remains unchanged, the area of ​​the rectangle changes with the change of length and width. When the length and width are equal, the area is the largest.

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For more information about the PPT courseware "Linear Equation of One Variable I've Become Fat", please click the "Linear Equation of One Variable PPT I've Become Fat" ppt tag.

"I'm Getting Fat" PPT courseware for linear equations of one variable:

"I'm Getting Fat" PPT courseware for linear equations of one variable Our goals: 1. By analyzing the equivalence relationships in practical problems, establish equations to solve practical problems. 2. Master the general process of using equations to solve practical problems. Thinking 1. Pour water into the taller glass...

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