1TH/vwo §9.3 Working with formulas

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 1

§ 9.3 Working with formulas

We've done so much with formulas, in § 9.1 and § 9.2:

+ shortening                + simplifying            + you name it!

However you might wonder:

What on earth can we DO with those formulas ?!

This burning question will be answered now!                            

Before we start with §9.3 ...

a look back at this week,

by 

- thinking about it yourself

- reflecting on it with your neighbor

- with the class

What is your most important

+ plus   and your main

+ minus from the outing (uitje) ?

Compare with your neighbor:

Your 

+. and your

-

Sharing as a class now.

In this paragraph we will practise how to calculate the result (= outcome) of a formula

Below are two examples.

Watch how the x sign returns, when filling in a number!

A little more about the multiplication sign follows.

And about the order of operations, too.

 Just watch the next slide!

Important: When you replace variables(letters) with numbers, the multiplication sign returns.

And here is an example:

There are a few more complicated exercises in this paragraph.

-  That's why we now do one of them!

Making it easier to deal with 

the others on your own,

later this lesson.

-  Open your Notebook and get a pen, please.

Make 22a in your 

Notebook, now.

SOLUTION:

Now make 22b in your Notebook. Good luck!

Solution:   

Finally 

make 

22c in your Notebook.

Finally 

make 

22c in your Notebook.

Solution:

SOLUTIONjkhj

Solution:

What's wrong here is this:    the number of days should be done times 40, but it isn't! 

TIP for improvement:     BRACKETS are missing. 

But where to put them? Think about it and be amazed in the next slide!

Homework:  § 9.3

not 22, that we just did together.

HAVO and H/V:   Support or Standard path

 2Vwo, then you'd better  do the Challenge path!

                 

VWO:   make the Challenge path.