1Tvwo §8.6 Mixed exercises(2)

Let's read this exercise first.
Please read out to us, .............. !
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Slide 1: Tekstslide
WiskundeMiddelbare schoolvwoLeerjaar 1

In deze les zitten 20 slides, met interactieve quizzen en tekstslides.

time-iconLesduur is: 45 min

Onderdelen in deze les

Let's read this exercise first.
Please read out to us, .............. !

Slide 1 - Tekstslide

Question:  What is an 'adjacent square'?
Answer: Adjacent squares are next to one another, or on top of one another.
For example: 1  and  -3,  or  2  and  -1.

Slide 2 - Tekstslide


Question:  Why cannot we move from 1 to 3 ?
Answer this in the next slide.

Slide 3 - Tekstslide

My answer: .............

Slide 4 - Woordweb


Question:  Why cannot we move from 1 to 3 ?
Answer:  Because we are not allowed to move 'diagonally'!

Slide 5 - Tekstslide

This is a FOTOVRAAG!
So:
+  Work it out in your Notebook and then
+ choose for the 'greater than' or 'smaller than' sign.
+ finally take a pic and send it in, in the next slide!
+ this is a Task for all!

Slide 6 - Tekstslide

-7.5 x -6 ........ -17 -
(5)2

Slide 7 - Open vraag

Solution:
-7        x -6 = 45            -17 -             = -17 - 25 = - 42  
So the sign for 'greater than' has to be used!
21
(5)2

Slide 8 - Tekstslide

As you can see, the numbers are multiplied by each other.
Which is the only number you can fill in now?
Fill in in the next slide.

Slide 9 - Tekstslide

The number to be filled in is ...

Slide 10 - Woordweb

Slide 11 - Tekstslide

Solution:
2 x 3 = 6,    3 x -6 = -18   and   -1 x -3 = 3,  so
6, -6 and -1 are the numbers to be filled in.

Slide 12 - Tekstslide


Question: which numbers can you fill in ?
Give your answer in the next slide.

Slide 13 - Tekstslide

The number you can fill in is .....

Slide 14 - Woordweb

This is called:
a Magic Square.
Try to find out what makes it 'magic' and explain this in the next slide!

Slide 15 - Tekstslide

It's a magic square, because ...

Slide 16 - Woordweb

There is a strong regularity (= regelmaat) in it:
Horizontal:                  Vertical:                      Diagonally:                   
4 + -6 + 8 = 6               4 + 6 + -4 = 6            4 + 2 + 0 = 6
6 + 2 + -2 = 6                -6 + 2 + 10 = 6          -4 + 2 + 8 = 6
-4 + 10 + 0 = 6             8 + -2 + 0 = 6 

Slide 17 - Tekstslide

Homework:
Do §9.6:
48,  49  and  52
It's only 3 exercises, but do them good!
As far as 49 is concerned, watch the following slide.

Slide 18 - Tekstslide

First write down your Calculations of both sides of a task.
Only then write down the 'greater than' or 'smaller than' sign!
So not just the answer.

Slide 19 - Tekstslide

Slide 20 - Tekstslide