1TH/vwo §5.4 Dividing in a given ratio

§5.4 Dividing in a given ratio
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§5.4 Dividing in a given ratio

Slide 1 - Diapositive

What are HIGHLIGHTS?

Slide 2 - Diapositive

Highlights?

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Highlights?

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As a pair:
One of you tells the other a HIGHLIGHT from your Holiday.
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As a pair:
Now reverse the roles:
tell the other a HIGHLIGHT from your Holiday.
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Slide 6 - Diapositive

§5.4 Dividing in a given ratio
What does this mean?!
Let's look at a simple example.

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Dividing 400 euros between 2 friends in the given ratio of  3 to 1, or  3 : 1.                                    As follows:
1.      3 : 1  means that there are 4 parts in total, of which one get 3 parts and               the other only 1 part.
2.    one part is  400 : 4 = 100 euros.
3.    one friend gets 3 x 100 = 300 euros, the other 1 x 100 = 100 euros.
4.    check:     300 + 100 = 400 euros.  It checks out!

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Organising is the real thing!
+ take some essentials before you now:
    pen, pencil, Notebook, Textbook, etcetera
+ these things make it easier to answer the coming tasks on 
   LessonUp and also to do the Homework, afterwards!

Slide 9 - Diapositive

Task 1 for you(!):
Divide 500 euros in the ratio 3 : 1 
between two friends.

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dividing 500 in the ratio 3 : 1 gives
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A
300 and 200
B
400 and 100
C
375 and 125
D
425 and 75

Slide 11 - Quiz

Explanation Task 1:
Divide 500 euros in the ratio 3 : 1.
1.  there are 3 + 1 = 4 parts in total
2.  one part = 500 :  4 = 125 euros
3.  one gets 3 x 125 = 375   and the other gets  1 x 125 = 125  euros 

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Schermafbeelding 2020-12-12 om 19.39.06



 For another example, see next slide.

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Schermafbeelding 2020-12-12 om 19.39.13

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Task 2:
Choose the right answer in the next slide!

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Task 2:
Divide 360 euros in the ratio
7 : 5
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A
150 and 210
B
165 and 195
C
210 and 150
D
160 and 200

Slide 18 - Quiz

explanation:

Slide 19 - Diapositive

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Task 3:

Slide 21 - Diapositive

Divide 390 kg in the ratio
5 : 8
A
120 and 270
B
150 and 240
C
240 and 150
D
140 and 250

Slide 22 - Quiz

explanation:

Slide 23 - Diapositive

Watch this...

Slide 24 - Diapositive

Task 3:
Think hard about the following exercise:

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explanation:
Schermafbeelding 2020-12-12 om 19.40.40

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About making §5.4 :
You now learnt an easy way to solve the tasks.
 Make sure that when making the tasks, you 
WRITE DOWN a GOOD CALCULATION!! 
Use the steps we 
just practised.

Slide 27 - Diapositive

Homework time
Time to do §5.4 !  
1. put your ipad in the bag
2. make §5.4
3. correct your work with the Solutionsbook

Slide 28 - Diapositive