# Yr 9 Unit4 Week 1 - Lesson 3

Yr 9 Unit 4 - Lesson 3
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Slide 1: Slide
MathematicsLower Secondary (Key Stage 3)

This lesson contains 34 slides, with interactive quizzes and text slides.

Lesson duration is: 50 min

## Items in this lesson

Yr 9 Unit 4 - Lesson 3

#### Slide 1 -Slide

Write an explanation for the word rearranging

#### Slide 2 -Mind map

Consider the expression 2x + 3y + 4x + 5y.

The word REARRANGING describes the method whereby the various terms in the expression are repositioned i.e.

2x + 4x + 3y + 5y

#### Slide 3 -Slide

Write an explanation for the word scaling

#### Slide 4 -Mind map

The word SCALING refers to an action whereby some original value is increased by multiplying it by a value  greater than 1 or decreased  by multiplying it by a value less than 1.

#### Slide 5 -Slide

The word SCALING refers to an action whereby some original value is increased by multiplying it by a value  greater than 1 or decreased  by multiplying it by a value less than 1.

• Increased scaling --> 2 x original value

#### Slide 6 -Slide

The word SCALING refers to an action whereby some original value is increased by multiplying it by a value  greater than 1 or decreased  by multiplying it by a value less than 1.

• Increased scaling --> 2 x original value
• Decreased scaling --> 0.5 x original value

#### Slide 7 -Slide

Which of the values for x and y satisfy the equation 2x + 3y = 12
A
x = 0 and y = 12
B
x = 3 and y = 4
C
x = 0 and y = 4
D
x = 3 and y = 2

#### Slide 8 -Quiz

DO NOW
• TITLE - Unit 4 Week 1 - Lesson 3 DO NOW
• INSTRUCTIONS - Write out the questions in your book and answer.

#### Slide 12 -Slide

NEW LEARNING
• TITLE - Unit 4 Week 1 - Lesson 3 NEW LEARNING
• INSTRUCTIONS - Copy the note from the following slide into your book.

#### Slide 15 -Slide

3x = 12
x + y = 5
Find the value of x and y
A
x = 12 y = -7
B
x = 3 y = 2
C
x = 4 y = 1
D
x = 4 y could be anything

#### Slide 17 -Slide

x - 5 = -3
2x + y = 10
Find the value of x and y
A
x = -3 y = 16
B
x = 2 y = 6
C
x = 5 y = 0
D
x = 8 y = -6

#### Slide 19 -Slide

x + y = 5
2y - 3 = 11
Find the value of x and y
A
x = -2 y = -7
B
x = 3 y = 2
C
x = 7 y = -2
D
x = 2 y = 3

#### Slide 21 -Slide

INDEPENDENT STUDY Part 1
• TITLE - Unit 4 Week 1 - Lesson 3 INDEPENDENT STUDY
• INSTRUCTIONS - Write out the questions in your book and answer.
• QUESTIONS TO DO - 1 to 5

#### Slide 27 -Slide

INDEPENDENT STUDY Part 2
• TITLE - Unit 4 Week 1 - Lesson 3 INDEPENDENT STUDY
• INSTRUCTIONS - Write out the questions in your book and answer.
• QUESTIONS TO DO - 1 to 10