"Solving Equations" Equations PPT courseware 4

Description

"Solving Equations" Equations PPT courseware 4

teaching objectives

1. Experience the process of guessing games, using equations to represent slightly complex equivalence relationships, and solving equations.

2. Be able to use equations to express equivalence relationships described in words, and be able to apply the properties of equations to solve two-step calculation equations.

3. Actively participate in mathematical activities such as guessing games and solving equations to gain successful experience and understand the function of equations.

Review old knowledge

Solving equations.

x－35＝75 x÷5＝60

Explore new knowledge

Guessing game.

This number is 25.

Do you know how the teacher guessed the number?

Solution: Let this number be x.

Think of the number × 2 + 10 = 60, and list the equation.

2x+10=60

2x=60-10 Treat 2x as a number and subtract 10 from both sides of the equation.

2x=50

x=50÷2 Divide both sides of the equation by 2.

x=25

practice

1. Look at the equations in the diagram and solve them.

Solution: 48+2x=102

48+2x-48＝102-48

2x=54

x=27

2. Solve the equation.

3. Make equations and solve them.

Solution: Suppose this number is x, then 4 times it is 4x.

4x-73=135

4x－73＋73＝135＋73

4x=208

x=52

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For more information about the "Equations Solving Equations" PPT courseware, please click the "Equations ppt Solving Equations ppt" tab.

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Update Time: 2024-09-09

This template belongs to Mathematics courseware Hebei Education Edition Fifth Grade Mathematics Volume 1 industry PPT template

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