# Yr 9 Unit4 Week 3 - Lesson 1

Yr 9 Unit4 Week 3 - Lesson 1
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Slide 1: Tekstslide
MathematicsLower Secondary (Key Stage 3)

In deze les zitten 46 slides, met interactieve quizzen en tekstslides.

Lesduur is: 50 min

## Onderdelen in deze les

Yr 9 Unit4 Week 3 - Lesson 1

#### Slide 5 -Tekstslide

Starter
Calculate the following expressions:

3 + 4 x 5
3 x 4 + 5
3 x (4 + 5)
3 x 4 + 4 x 5
18 ÷ 2 + 6
18 ÷ 6 - 2
18 ÷ (3 + 6)
18 ÷ 3  + 13
timer
4:00

#### Slide 6 -Tekstslide

Starter
Calculate the following expressions:

3 + 4 x 5
3 x 4 + 5
3 x (4 + 5)
3 x 4 + 4 x 5
23
17
27
32
18 ÷ 2 + 6
18 ÷ 6 - 2
18 ÷ (3 + 6)
18 ÷ 3  + 13

#### Slide 7 -Tekstslide

Starter
Calculate the following expressions:

3 + 4 x 5
3 x 4 + 5
3 x (4 + 5)
3 x 4 + 4 x 5
23
17
27
32
18 ÷ 2 + 6
18 ÷ 6 - 2
18 ÷ (3 + 6)
18 ÷ 3  + 13
15
1
2
19

#### Slide 8 -Tekstslide

Calculate a + b given a = 4 and b = 6
A
4
B
6
C
10
D
2

#### Slide 9 -Quizvraag

Calculate 2a + b given a = 4 and b = 6
A
6
B
8
C
12
D
14

#### Slide 10 -Quizvraag

Calculate a + b given a = -4 and b = 6
A
2
B
10
C
6
D
-4

#### Slide 11 -Quizvraag

Calculate 2a + b given a = -4 and b = 6
A
-2
B
2
C
-14
D
14

#### Slide 12 -Quizvraag

Calculate a + b given a = -4 and b = -6
A
10
B
-10
C
2
D
-2

#### Slide 13 -Quizvraag

Calculate 2a + b given a = -4 and b = -6
A
-2
B
2
C
-14
D
14

#### Slide 14 -Quizvraag

Calculate a + b given a = 4 and b = -6
A
10
B
-10
C
2
D
-2

#### Slide 15 -Quizvraag

Calculate 2a + b given a = 4 and b = -6
A
-2
B
2
C
-8
D
8

#### Slide 16 -Quizvraag

DO NOW
TITLE - Week3  Lesson 1  DO NOW

INSTRUCTIONS - Write the selected questions into your exercise book and then answer them.

QUESTIONS - All the left hand side and top right

timer
6:00

#### Slide 20 -Tekstslide

Talk Task Example 1
Given c = 2x - 9 and e = 4x, find c + e.

#### Slide 21 -Tekstslide

Talk Task Example 1
Given c = 2x - 9 and e = 4x, find c + e.

c + = 2x - 9 + 4x

#### Slide 22 -Tekstslide

Talk Task Example 1
Given c = 2x - 9 and e = 4x, find c + e.

c + = 2x - 9 + 4x

= 2x + 4x - 9

#### Slide 23 -Tekstslide

Talk Task Example 1
Given c = 2x - 9 and e = 4x, find c + e.

c + = 2x - 9 + 4x

= 2x + 4x - 9

= 6x - 9

#### Slide 24 -Tekstslide

Talk Task Example 2
Given a = 3x + 4 and f = 7 - 2x, find a + f.

a + = 3x + 4 + 7 - 2x

= 3x - 2x + 4 + 7

= x + 11

#### Slide 25 -Tekstslide

Talk Task Example 3
Given g = -5 - 3x and h = 3(3x + 2), find g + h.

g + = -5 - 3x + 9x + 6

= -3x + 9x - 5 + 6

= 9x - 3x + 6 - 5  = 6x + 1

#### Slide 26 -Tekstslide

Exercise
Given c = 5x + 17 and d = 10 + 2x, find:

1.  2
2.  3d
3.  c + d
4.  2c + d
5.   2c + 3d

#### Slide 27 -Tekstslide

Exercise
Given c = 5x + 17 and d = 10 + 2x, find 2c.

2c = c + c

= 5x + 17 + 5x + 17

= 5x + 5x + 17 + 17 = 10x + 34

= 2x + x - 9 - 10   = 3x - 19

#### Slide 28 -Tekstslide

Exercise
Given c = 5x + 17 and d = 10 + 2x, find 3d.

3d = d + d + d

= 10 + 2x + 10 + 2x + 10 + 2x

= 2x + 2x + 2x + 10 + 10 + 10 = 6x + 30

= 2x + x - 9 - 10   = 3x - 19

#### Slide 29 -Tekstslide

Exercise
Given c = 5x + 17 and d = 10 + 2x, find c + d.

c + = 5x + 17 + 10 + 2x

= 5x + 2x + 17 + 10

= 7x + 27

#### Slide 30 -Tekstslide

Exercise
Given c = 5x + 17 and d = 10 + 2x, find 2c + d.

2c + = 10x + 34 + 10 + 2x

= 10x + 2x + 34 + 10

= 12x + 44

#### Slide 31 -Tekstslide

Exercise
Given c = 5x + 17 and d = 10 + 2x, find 2c + 3d.

2c + 3d = 10x + 34 + 30 + 6x

= 10x + 6x + 34 + 30

= 16x + 64

#### Slide 32 -Tekstslide

NEW LEARNING
TITLE  Week 3 - Lesson 1 - NEW LEARNING

INSTRUCTIONS - Write down the following notes in your exercise book.

#### Slide 35 -Tekstslide

If a = x + 2 and b = 3x, what is a + b in terms of x?
A
3x + 2
B
4x + 2
C
5x
D
3x2+2

#### Slide 37 -Tekstslide

If a = x + 2 and b = 3x, what is b - a in terms of x?
A
2x + 2
B
5
C
2x - 2
D
x

#### Slide 39 -Tekstslide

If g = 2f + 1 and h = g + 2, which of these is definitely true?
A
h = f
B
h = 4f + 3
C
h = 2f + 2
D
h = 2f + 3