Module 9 Lesson 4

Module 9 Lesson 4

By Mr. Wellner

Students will be able to

write and graph equations to solve a variety of real-world situations involving addition, subtraction, multiplication, or division.

6th | Math

Objective / Goal

1. Paper/Notebook

2. Pencil

3. Protractor

4. Calculator to check your answer.​

​

Make sure you are writing down every example.

Materials

Poll

The sum of the measures of the two angles shown is 180º. What is the unknown angle measure?

What unit of measure is used for angles?

• inches

• kilometers

• degrees

• liters

Open Ended

The sum of the measures of the two angles shown is 180º.

Write an Equation to represent the relationship in the diagram.

​x + 67 = 180

-67​ -67

x = 113​

6th | Math

Explanation​

Open Ended

A store sells 3 cell phone cases for $50.25. Write and solve an equation to find how much money x the store charges for each case.

Write an equation to represent this situation.

​3x = 50.25

6th | Math

Explanation​

Open Ended

Paul has his laptop open at a 105° angle. If he closes his laptop to a 19° angle or less, the laptop will go into sleep mode. How many degrees x does Paul need to close his laptop before it will go into sleep mode?

Write an equation you can use to solve for the unknown angle measure.

​x + 19 = 105

- 19 -19 Subtract 19 from both sides

x = 86

Paul needs to close his laptop 86 degrees before it goes into sleep mode.

6th | Math

Explanation​

Open Ended

The picture shows the flat and angled positions that an artist likes her tablet in when drawing. The flat viewing angle measures 180°. What is the measure of the unknown angle?

Write an equation you can use to find the second viewing angle?

​42 + x = 180

-42 -42 Subtract 42 from both sides

x = 138

​

6th | Math

Explanation​

Check your understanding

​2 questions

Multiple Choice

The perimeter of a square is 68 inches. Write and solve an equation to find the length of its sides.

• 5s = 68

  s = 13.6

• $$\frac{s}{4}=68$$  

  s = 272

• $$\frac{s}{4}=68$$  

  s = 17

• 4s = 68

  s = 17

Multiple Choice

Kamal makes $12.00 an hour at his job. Last week he earned $390. Write and solve an equation to determine how many hours Kamal worked last week.

• 12h = 390

  h = 4680

• 390 - h = 12

  h = 378

• $$\frac{h}{12}\ =\ 390$$  

  h = 4680

• 12h = 390

  h = 32.5