# 1718 WH3X CH4 Lesson 2

Which homework exercises should I discuss on the board?
1 / 15
Slide 1: Woordweb
WiskundeMiddelbare schoolhavoLeerjaar 3

In deze les zitten 15 slides, met interactieve quizzen en tekstslides.

Lesduur is: 50 min

## Onderdelen in deze les

Which homework exercises should I discuss on the board?

#### Slide 1 -Woordweb

Refresh

Parabolas
Calculation order
Square roots

#### Slide 2 -Tekstslide

Parabolas
The graph of a quadratic formula
is called a parabola.
If the number in front of         is negative,
the graph is an upward opening parabola,
if it is positive the graph is a downward
opening parabola.
Parabolas are symmetrical, you can draw a
vertical line that is the axis of symmetry.
The vertex (highest or lowest point of the
parabola) lies on the axis of symmetry.

#### Slide 3 -Tekstslide

What type of parabola corresponds to this formula?
y=5x4x2
A
Upward opening parabola
B
Downward opening parabola
C
It is not a parabola

#### Slide 4 -Quizvraag

Calculation order/Order of operations
When calculating, follow the order of operations:
• First calculate what is between brackets
• Then raise to a power and take the square root from inside to outside
• Then multiply and divide from left to right
• Then add and subtract from left to right

#### Slide 5 -Tekstslide

Powers and brackets
When raising a number to a power, there is a difference if the number is in brackets or not!

Calculate

24+(38)2=

Square roots

#### Slide 8 -Tekstslide

What is the square root of 100?
A
10
B
50
C
10000
D
200

#### Slide 10 -Tekstslide

Write as short as possible:

35+711+55=
A
810+711
B
85+711
C
1521
D
something else

#### Slide 11 -Quizvraag

Multiplying square roots

#### Slide 12 -Tekstslide

Write as short as possible:

21137=
A
518
B
577
C
618
D
677

#### Slide 13 -Quizvraag

Homework Monday
CH4, Refresh.
Make and correct:
R3, R6, R7, R8

#### Slide 14 -Tekstslide

Any (useful) comments on this lesson and/or the old/new homework?