1TH/vwo §5.4 Dividing in a given ratio

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 1

§5.4 Dividing in a given ratio

What are HIGHLIGHTS?

Highlights?

Highlights?

As a pair:

One of you tells the other a HIGHLIGHT from your Holiday.

As a pair:

Now reverse the roles:

tell the other a HIGHLIGHT from your Holiday.

§5.4 Dividing in a given ratio

What does this mean?!

Let's look at a simple example.

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!

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!

Task 1 for you(!):

Divide 500 euros in the ratio 3 : 1 

between two friends.

dividing 500 in the ratio 3 : 1 gives

1. 300 and 200
2. 400 and 100
3. 375 and 125
4. 425 and 75

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 

Schermafbeelding 2020-12-12 om 19.39.06

 For another example, see next slide.

Schermafbeelding 2020-12-12 om 19.39.13

Task 2:

Choose the right answer in the next slide!

Task 2:
Divide 360 euros in the ratio
7 : 5

1. 150 and 210
2. 165 and 195
3. 210 and 150
4. 160 and 200

explanation:

Task 3:

Divide 390 kg in the ratio
5 : 8

1. 120 and 270
2. 150 and 240
3. 240 and 150
4. 140 and 250

explanation:

Watch this...

Task 3:

Think hard about the following exercise:

explanation:

Schermafbeelding 2020-12-12 om 19.40.40

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.

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