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2Tvwo § 3.4 Simplifying square roots '19'20
Before doing §3.4 Simplifying square roots,
we do exercise C6, p.103, of §3.3
Next slide
shows it to you
a bit bigger.
Make this task
right now in your
Notebook!
1 / 25
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Slide 1:
Slide
Wiskunde
Middelbare school
havo, vwo
Leerjaar 2
This lesson contains
25 slides
, with
interactive quizzes
and
text slides
.
Lesson duration is:
50 min
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Items in this lesson
Before doing §3.4 Simplifying square roots,
we do exercise C6, p.103, of §3.3
Next slide
shows it to you
a bit bigger.
Make this task
right now in your
Notebook!
Slide 1 - Slide
TIP:
1. Copy
the Sketch
2. Fill in all the
lengths of the
sides and
3. Calculate the
AREA.
timer
3:00
Slide 2 - Slide
Task:
Solution:
Slide 3 - Slide
§3.4 Simplifying square roots
In this § you will learn how to write a square root as:
a multiplication of a whole number and a root, like
=
The reason why this is allowed and why it is useful, soon follows!
√
5
0
5
√
2
Slide 4 - Slide
Let's talk business, as usual!
- open your Textbook and Notebook and
- Make exercise 26, p.105, §3.4 So: skip 24 and 25 !
- Study the Theory on p.105
- still time left? Go on with 27, etcetera.
timer
5:00
Slide 5 - Slide
Slide 6 - Slide
In 26 you tried to write
as a multiplication of a whole number and a root.
This is how it is possible:
= x
= 2 and so we get the final form:
=
√
4
0
√
4
0
√
4
√
1
0
√
4
√
4
0
2
√
1
0
Slide 7 - Slide
You are going to learn this method by practising a lot!
How could we rewrite:
as a multiplication of a whole number and a root?
So write it in this shape: = .... x . .....
ANS
√
1
2
√
1
2
√
Slide 8 - Slide
√
1
2
A
4 root 3
B
6 root 2
C
2 root 3
D
3 root 2
Slide 9 - Quiz
Solution:
= x = 2 x = 2
√
1
2
√
4
√
3
√
3
√
3
Slide 10 - Slide
Slide 11 - Slide
Make exercise 27 and 28 and after that ...
Study Method on p.106.
Still time left?
Go on with 29, 30 and 31.
timer
8:00
Slide 12 - Slide
Now we do 27 and 28 together!
First a real root joke.
Slide 13 - Slide
Slide 14 - Slide
Your teacher will ask some of you what to fill in here.
So you can check what you just made in your Notebook.
Slide 15 - Slide
Let's tackle these in the same way!
Slide 16 - Slide
Now we look back at this exercise, that you just tried to do.
32 is divisible by the square numbers: 1, 4 and 16.
Did you have it correct?
Slide 17 - Slide
Let's find out together what had to be filled in here!
Slide 18 - Slide
Did have this one good?
If not, do you now understand it?
Anyway, let's Study the Method on p.106 now!
Slide 19 - Slide
Slide 20 - Slide
Let's do one more together,
to see if you understand it.
Simplify
ANS
√
6
3
Slide 21 - Slide
√
6
3
I simplify
Slide 22 - Mind map
Explanation:
= x = 3 x =
You've just been doing 29a!
When doing 29b, c etcetera, don't skip any of the steps,
in order to avoid making mistakes.
√
6
3
√
9
√
7
√
7
3
√
7
Slide 23 - Slide
Homework
Do §3.4 , skipping 24 and 25.
Don't forget to CHECK your work with the famous Solutionsbook.
Send in your pictures.
Slide 24 - Slide
HOMEWORK
Make and correct §3.4
(and anything from Refresh, §3.1, §3.2 and §3.3 you have not done yet)
Slide 25 - Slide
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