Solving simple equations

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 2

Good morning!

Schedule: 

• Learning goals 
• Review
• One-step equations/inverse operations
• Continue with your work
• 5-minute challenge

Learning goals 

At the end of this lesson I can:

• Solve 1-step equations using inverse operations

Review

The recommended dose of medicine for a child aged a years is 

                            mL

Find the recommended dose for a child aged 8 years

D=​a+12​​50a​​

Find the recommended dose

Solve for x:
2x = 18

Solve for x:
x + 7 = 16

Solve for x:

​10​​x​​=3

Solve for x:
2x + 5 = 13

What to do

Open this LessonUp on your device. 

Work on the slides with the appropriate color: 

- Got 4 question right                               I really want a challenge!

- Got 0-3 questions right                        I think a bit more practice will help me!

Solving equations

When you need to solve an equation, we use inverse operations to isolate the variable

Inverse operations: 

+                       

-                      

⋅                      

/                      

Solving equations

When you need to solve an equation, we use inverse operations to isolate the variable

Inverse operations: 

+        -             

      -        +                  

⋅         /             

/        ⋅           

x + 5 = 6

x + 5 - 5 = 6 - 5

Inverse operations

  2x = 18 

Starter 1

Inverse operations

  2x = 18 

2 ⋅ x = 18

2 ⋅ x ÷ 2 = 18 ÷ 2

x = 9

Starter 1

Inverse operations

  x + 7 = 16

Starter 2

Inverse operations

  x + 7 = 16

 x + 7 - 7 = 16 - 7

 x  = 9

Starter 2

Inverse operations

Starter 3

​10​​x​​=3

Inverse operations

Starter 3

​10​​x​​=3

​10​​x​​⋅10=3⋅10

x = 30

Inverse operations

2x + 5 = 13 

Starter 4

Inverse operations

2x + 5 = 13 

2x + 5 - 5 = 13 - 5

2x = 8

2 ⋅ x = 8

2 ⋅ x ÷ 2= 8 ÷ 2

x = 4

Starter 4

How many can you solve?

What to do 

- Finish coloring your picture

- Ask for a Menu Math worksheet

Challenge

Go to ManageBac > Files > Unit 3 > Challenging multip step equations 2