1TH/Vwo Ch7 Fractions

FRACTIONS
What are fractions?
How to deal with those little fellows?
You will be doing +, -, x and even :
with fractions.
Take a pen/pencil and a piece of paper. You will need it!
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Slide 1: Tekstslide
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In deze les zitten 24 slides, met interactieve quizzen, tekstslides en 2 videos.

Lesduur is: 50 min

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FRACTIONS
What are fractions?
How to deal with those little fellows?
You will be doing +, -, x and even :
with fractions.
Take a pen/pencil and a piece of paper. You will need it!

Slide 1 -Tekstslide

§7.3  and  §7.4 Fractions
This lesson up includes all operations with fractions:
+        -        x      and even     :      (not in this book)
It also deals with the words 'numerator' and 'denominator' and
offers you a song!

Slide 2 -Tekstslide

timer
0:20
What is a fraction?

Slide 4 -Tekstslide

Calculate and simplify
2/3 + 3/4 =
timer
0:45
A
1 5/7
B
17/12
C
19/12
D
1 5/12

2/3 + 3/4 =
8/12 + 9/12=
17/12=
1   5/12

Slide 6 -Tekstslide

Calculate 4/5 - 1/2 =
timer
0:45
A
3/5
B
3/3
C
1
D
3/10

4/5 - 1/2=
8/10 - 5/10=
3/10

Slide 8 -Tekstslide

What is the name for 8 in 8/9 ?
timer
0:20
A
fraction
B
denominator
C
numerator
D
number

Slide 9 -Quizvraag

What is the name for 6 in 5/6 ?
timer
0:20
A
numerator
B
provider
C
terminator
D
denominator

Slide 11 -Video

After this great song ...
There is  more to Fractions than adding and subtracting.
Like:
multiplying and also dividing
See next slides!

Calculate:
4/5 x 2/3 =
timer
0:45

Slide 14 -Open vraag

Next dividing fractions is explained.
For your good understanding this first:
the reciprocal = het omgekeerde
For example:         is the reciprocal of
34
43

Slide 16 -Video

Calculate and simplify:
5/6 : 3/4 =
timer
1:00

Explanation:

5/6  :  3/4 =
5/6  x  4/3 =
20/18 =
10/9 =
1  1/9

Slide 18 -Tekstslide

:            = ...........
This final task is no piece of cake!
A few tips:
1st make the two numbers into two fractions
2nd remember that dividing fractions asks for multiplying by
the reciprocal (=omgekeerde)!
1141
241

Slide 19 -Tekstslide

Calculate and symplify:
1 1/4 : 2 1/4 =
timer
1:30
A
9/5
B
5/9
C
1 4/5
D
2 1/5

Slide 20 -Quizvraag

1  1/4  :   2   1/4  =
5/4  :  9/4  =
5/4   x  4/9  =
20/36  =
5/9

Slide 21 -Tekstslide

My understanding
of fractions
on a scale of 1 to 10.

Slide 22 -Woordweb

Homework:
Make complete in your Notebook: §7.1  t/m   §7.4