# 1TH/Vwo §6.2 Percentages

§6.2 Percentages
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Slide 1: Tekstslide
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In deze les zitten 28 slides, met interactieve quizzen en tekstslides.

Lesduur is: 50 min

## Onderdelen in deze les

§6.2 Percentages

#### Slide 1 -Tekstslide

Question:
What is used in both situations?

#### Slide 2 -Tekstslide

In both situations a ............. is used.

#### Slide 3 -Woordweb

A RATIO TABLE !
On the right you see
an example of it.

#### Slide 4 -Tekstslide

Let's do a Task together, using a Ratio Table.
+ pay attention to every little step
+ soon you will do one yourself!

#### Slide 5 -Tekstslide

This calls for a Ratio Table!

#### Slide 9 -Tekstslide

Watch what a subtle role is played by the number '1' !
Going from 20 to 6 directly is more difficult,
so we go from 20 to 1 to 6, which is much easier!

#### Slide 10 -Tekstslide

The percentage of pupils is ...
A
25
B
35
C
30
D
40

summarizing:

#### Slide 13 -Tekstslide

Reminder:
When making the homework,
Make sure you produce a RATIO TABLE for every exercise!

#### Slide 16 -Tekstslide

Do the following exercise.
+ Take your pen, pencil and geo triangle
+ Watch the next slide!
+ Try the exercise yourself.
(this exercises is also in your book, p.180)

#### Slide 17 -Tekstslide

Apply what you just learned:
timer
4:00

#### Slide 19 -Tekstslide

Now work for yourself on §6.2 (= homework).

+ Make RATIO TABLES for every exercise!
+ No calculator; work it all out on paper and in your head.
+ Skip 12
+ Later follows a new instruction.
timer
12:00

#### Slide 20 -Tekstslide

New instruction:
+ Up to now we calculated a percentage, in the table below.
+ However from exercise 15 on it's the other way around.
+ Now we will calculate the number, up!

#### Slide 26 -Tekstslide

Again watch the vital part that is played by the number '1'!
Now it is on the bottom line(!) and
it helps us going from 100 to 15 in a simple way.

#### Slide 27 -Tekstslide

HOMEWORK:
In this way do:
You only have to make:
16, 17, 18 and 19 from §6.2.
However:  MAKE A RATION TABLE FOR EVERY EXERCISE!!
+ check your work with the Solutionsbook
+ take pics
+ send in in GC