# 1718 WB1Y CH4+8 Lesson 5

Which exercises would you like to discuss on the board?
1 / 14
Slide 1: Woordweb
WiskundeMiddelbare schoolvwoLeerjaar 1

In deze les zitten 14 slides, met interactieve quizzen en tekstslides.

Lesduur is: 50 min

## Onderdelen in deze les

Which exercises would you like to discuss on the board?

#### Slide 1 -Woordweb

What number should be written on the dots?

2 x 2 x 2 x 2 x 2 =
2...

#### Slide 2 -Open vraag

In , which number is the base and which number is the exponent?
25
A
base = 2 exponent = 5
B
base = 5 exponent = 2
C
base = 2 exponent = 32
D
base = 5 exponent = 25

#### Slide 3 -Quizvraag

More on powers
What happens if you multiply powers with the same base?

More on powers

#### Slide 5 -Tekstslide

More on powers
W

When multiplying powers with the same base,

#### Slide 6 -Tekstslide

What did you learn in CH4?
- Squaring numbers and raising numbers to a power
- Order of operations (notation!!!)
- Adding and subtracting fractions / decimal numbers
- Multiplying fractions / decimal numbers
- Calculating a fraction / percentage of an amount
- Simplifying fractions
- Rewriting fractions <--> percentages <--> decimal numbers
- The words: fraction, numerator, denominator, base, exponent

#### Slide 7 -Tekstslide

CH8: Negative Numbers
In Chapter 8 we will continue to do calculations that follow the order of operations and use fractions and decimal numbers, but that will also include negative numbers.
A good way to think of negative numbers is to think about temperatures: If it is freezing outside, the temperature could be 10 degrees below zero: it is - 10 (minus ten) degrees.

#### Slide 8 -Tekstslide

Number line
If we put positive and negative numbers on a horizontal
number line
, the negative numbers are written on the left
of zero and the positive numbers are written on the right of zero.
If you use a vertical number line, the positive numbers are
written above the zero and the negative numbers below zero.

#### Slide 9 -Tekstslide

Opposite numbers
Opposite numbers are numbers that are the same distance away from zero, but on the other side of zero.

-3 and 3 are opposite numbers                  -0.8 and 0.8 are opposite numbers

#### Slide 10 -Tekstslide

Greater than >
Less than <
You can say that 5 is greater than 3, you write:      5 > 3
You can say that 2 is less than 8, you write:              2 < 8
The open side of the > or < sign always faces the greater number of the two.
As a rule we say: the further to the right a number is on the number line, the greater it is.

#### Slide 11 -Tekstslide

Greater than >
Less than <
As a rule we say: the further to the right a number is on the number line, the greater it is. That means all negative numbers are less than all positive numbers.
- 2 is further to the right than -5,
so - 2 is greater than -5, you can write:                -2 > -5

#### Slide 12 -Tekstslide

Glossary §8.1
the temperature falls
the temperature rises

sequence
(a row of numbers that often have regularity)

distance

whole number
(examples: 2, 7, -25, -8: not a fraction or decimal number)

de temperatuur daalt
de temperatuur stijgt

reeks
(een rij getallen die vaak regelmaat vertonen)

afstand

geheel getal

#### Slide 13 -Tekstslide

Homework Tuesday 9/10
Make and correct:
- Chapter 4: 49, 50, 51
- Chapter 8: 1, 3, 4, 6, 7