1Th/vwo Ch5 totally!/SUMMARY

Ch 5 Ratio - more practice
Rounding off this Chapter, you'll get some tasks,
to show what you've learned by now.
A little explanation, before and after the task, is also given,
to refresh your memory.

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Slide 1: Slide
WiskundeMiddelbare schoolhavo, vwoLeerjaar 1

This lesson contains 17 slides, with interactive quizzes and text slides.

time-iconLesson duration is: 50 min

Items in this lesson

Ch 5 Ratio - more practice
Rounding off this Chapter, you'll get some tasks,
to show what you've learned by now.
A little explanation, before and after the task, is also given,
to refresh your memory.

Slide 1 - Slide

Get organised first...
Take before you:
+ pencil, pen and eraser
+ open your Notebook 
+ first the THEORY and an EXAMPLE follow!
+ after this you will make an exercise yourself

Slide 2 - Slide

Slide 3 - Slide

Task 1:   Find the Scale!
Posters are made for the schoolparty.
A beetle (kever) is drawn by you.
The picture is 110 cm long. The real beetle is 0.55 cm long.
Make this task in your NOTEBOOK:
MAKE A RATIO TABLE in your NOTEBOOK now and fill it in!
FINALLY WRITE DOWN THE SCALE for the Beetle!

timer
2:00

Slide 4 - Slide


A
1 : 200
B
200 : 1
C
1 : 20
D
20 : 1

Slide 5 - Quiz

Solution (2):

Conclusion from this TABLE:
the ratio is  200 : 1
(and NOT 1 : 200, because the REAL OBJECT is SMALLER than 
the PICTURE)

Slide 6 - Slide

Solution Scale task (1):
The picture is 110 cm long. The beetle is 0.55 cm long. The key question is:
.... cm in the drawing is  ... cm in reality
Let's calculate how many times 0.55 cm fits in 110 cm.
110 : 0.55 = 11000 : 55  
As 55 fits two times  in 110, it fits two hundred times in 11000
So, the scale is         200 : 1 
Next slide shows HOW TO MAKE THE RATIO TABLE, that I asked you to make!          







Slide 7 - Slide

FOTOVRAAG :  
COPY and FILL IN this RATIO TABLE:
timer
2:00

Slide 8 - Slide

FOTOVRAAG :  
Make and FILL IN a RATIO TABLE for:
timer
2:00

Slide 9 - Slide


Slide 10 - Open question

Solution Task 2:

Slide 11 - Slide

Task 3:


Make a Ratio Table in your Notebook.
Solve the question.
timer
1:00

Slide 12 - Slide

Task 3:

Key in your answer in the next slide.
By the way, you may also 
work with 10 percent instead of 
1 percent.

Slide 13 - Slide

.. girls

Slide 14 - Mind map

Solution:
Number of pupils   30    3    24
percentage              100   10    80
So because the girls are 80 percent, there are 24 girls.


Slide 15 - Slide

How good is your understanding about ratio tables now?
On a scale of 1 to 10.

Slide 16 - Mind map

Preparing for tomorrows test:
- Make the exercises from Chapter 5 that you did not do yet!
- Make the exercises that you had wrong the first time, again.
- Do some NEW EXERCISES:
   p.190/191 Mixed exercises. Choose some of them:
   Make them in your Notebook and check them with the Solutionsbook!

Slide 17 - Slide