"Solving linear equations of one variable" PPT courseware for linear equations of one variable 3

Description

"Solving linear equations of one variable" PPT courseware for linear equations of one variable 3

learning target

1. Master the method of using linear equations of one variable to solve practical problems, and be able to use the distributive law and remove brackets to solve linear equations of one variable containing parentheses.

2. Experience the process of applying equations to solve practical problems, develop the ability to analyze and solve problems, and further understand the role of equation models.

3. Pay attention to students' performance in the process of establishing and solving equations, and develop students' positive thinking learning attitude and awareness of cooperation and communication.

Move items, merge similar items, and set the coefficient to 1. What should you pay attention to?

①When moving an item, change the sign. (Become the opposite number)

② When merging similar items, just add the coefficients of similar items as the coefficients of the resulting item, and the letters remain unchanged.

③The coefficient is reduced to 1, which means that both sides of the equation are divided by the coefficient in front of the unknown at the same time.

Knowledge explanation

We add a bracket after the equation 6x-7=4x-1 to get

Will 6x-7=4(x-1) be solved?

Is it possible to add a negative sign in front to get 6x-7=-(4x-1)?

Solving equations

3x-7 (x-1) =3-2 (x +3)

Solution: Remove the brackets and get 3 x -7 x +7 =3-2 x -6

Shift the terms to get 3 x -7 x +2 x =3-6 -7

Combining similar items yields -2 x = -10

The coefficient is changed to 1, and x = 5

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Update Time: 2024-11-20

This template belongs to Mathematics courseware People's Education Press Seventh Grade Mathematics Volume 1 industry PPT template

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