1TTO §10.3 (part 2) Working with formulas

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• Middelbare school
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• Leerjaar 1

§ 10.3 (Part 2) Working with formulas

We've done so much with formulas, in § 10.1 and § 10.2:

+ shortening                + simplifying            + you name it!

In this paragraph we will practise how to calculate the result of a formula

Below are two examples: (Mind the order....

H M W VD OA......)

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

Yes indeed, you will experience the return of the multiplication sign very soon...

Just watch the next slide!

And here is an example: (Copy in your notebook!!)

There are a few more complicated exercise in this paragraph.

That's why we now look at one of them!

Making it easier to deal with them on your own,

later.

Homework:  § 10.3 part 2

Read page 115 Skill 'calculate the result of a formula' and the examples.

Make of p. 116: S5 and S6

Make of p. 120: E3 and E4.

Homework:  § 10.3 part 2

Read page 115 Skill 'calculate the result of a formula'

q = 2.5a  + 17

Calculate q when a=4

Homework:  § 10.3 part 2

Read page 115 Skill 'calculate the result of a formula'

q = 2.5a  + 17

Calculate q when a=4                                      2.5a means 2.5 TIMES a

                                          q =                         

Homework:  § 10.3 part 2

Read page 115 Skill 'calculate the result of a formula'

q = 2.5a  + 17

Calculate q when a=4                                      2.5a means 2.5 TIMES a

                                          q = 2.5a       + 17

replace a by 4  =>     q = 2.5 X 4   + 17

                                          q =       10       + 17   =  27