# 1TTO §8.5 multiplying fractions

Dagopening:
Grip
Clip Lauren Daigle Hold on to me
Gebed
Mededeling
1 / 28
Slide 1: Tekstslide
WiskundeMiddelbare schoolhavo, vwoLeerjaar 1

In deze les zitten 28 slides, met interactieve quizzen en tekstslides.

Lesduur is: 30 min

## Onderdelen in deze les

Dagopening:
Grip
Clip Lauren Daigle Hold on to me
Gebed
Mededeling

#### Slide 1 -Tekstslide

§8.5 Multiplying fractions
After   +       and        -     we now look at
the operation:       x   !
By the way, this is a pretty long LessonUp.

#### Slide 2 -Tekstslide

First we multiply a fraction by a whole number:

#### Slide 4 -Tekstslide

Now it's your turn:
D

Do:  2 X 33 : 3 = .......

32
x 33 = ...

solution:
2

#### Slide 7 -Tekstslide

another one for you:

3/13 x 52 = ....
A
10
B
9
C
14
D
12

Solution:

#### Slide 10 -Tekstslide

Now let's talk business:
Finally it's
Fraction times Fraction ...

#### Slide 11 -Tekstslide

2nd important point:
2. (in fact good news to some of you, who didn't know it yet!)

When multiplying fractions with unequal denominators,
you don't have to make them equal!!
Watch the next slides that show how simple it really is!

your turn again:

3/8 x 3/8 = ...
A
9/8
B
9/64
C
6/16
D
3/64

Solution:

#### Slide 17 -Tekstslide

Fotovraag: work out on paper, take a pic and send in in next slide!
1st Show your CALCULATION!
2nd This a task for ALL!

Don't forget to SIMPLIFY your answer, in the end!

#### Slide 18 -Tekstslide

2/7 + 1/7 x 1/2 = ......

Solution:

#### Slide 20 -Tekstslide

Now it's time for a complicated one:

Think about it for a while. After that we look at the solution.

#### Slide 21 -Tekstslide

This is the Solution:

#### Slide 22 -Tekstslide

For example this one.                                   You might think:
2  x  3 = 6      and                 x          =

So the final answer is:        6   +        =   6                 However this is WRONG!

21
41
81
81
81

#### Slide 23 -Tekstslide

Let's look back at the previous slide for a sec to see if both methods are good!

#### Slide 24 -Tekstslide

again work out on paper and send it in.
This time for every-every-every one!

#### Slide 25 -Tekstslide

1 1/8 x 1 1/3 = ......

Solution:

#### Slide 27 -Tekstslide

Homework:
§8.5 Make 8.5.
Write down your CALCULATIONS.
Showing only the answers has no value.
It's about the process of WORKING them out in LITTLE STEPS!