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1TTO §12.3 Multiplication and addition PTI
Here are the LIKE TERMS again, never leaving us alone.
However, recognising them makes your Maths life easier!
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Here are the LIKE TERMS again, never leaving us alone.
However, recognising them makes your Maths life easier!
Slide 1 - Diapositive
Task: Try to find the final answer for the easiest one.
Remember your answer, because you won't see the task in the next slide!
Slide 2 - Diapositive
The answer to the easiest one is:
8
⋅
5
2
+
2
⋅
5
2
=
o
r
8
⋅
7
2
+
2
⋅
3
2
=
A
25
B
50
C
269
D
250
Slide 3 - Quiz
Solution:
Slide 4 - Diapositive
Solution:
Did you notice that this task was all
about LIKE TERMS?
The terms 8 x and
2 x are the like terms here.
5
2
5
2
Slide 5 - Diapositive
Slide 6 - Diapositive
Task: Which has LIKE TERMS: A, B or C?
Slide 7 - Diapositive
Like terms are in:
A
A
B
B
C
C
Slide 8 - Quiz
All this information...
If it goes a bit too quick for you,
or it's a bit too much, then remember:
- It's just to warm you up for doing the § on your own.
- Doing your homework might go easier when you've been through the Theory and some Tasks too!
Slide 9 - Diapositive
A. Intro to the coming THEORY:
Do you remember this, about shortening? Just watch:
1f = f 1x = x
-1f = -f -1x = -x
This was Ch 10. The same thing applies with squares!
Watch the next slide and be amazed.
Slide 10 - Diapositive
B. Intro to the next slide, first this recap:
Basic rules: 1f = f or f = 1f and -1h = -h or -h = -1h
4f + 3f = 7f
4f + f = 4f + 1f = 5f
7d - d = 7d - 1d = 6d
Next we will look at similar calculations, only now with quadratic tasks!
Slide 11 - Diapositive
Slide 12 - Diapositive
Slide 13 - Diapositive
Slide 14 - Diapositive
Slide 15 - Diapositive
Slide 16 - Diapositive
How to solve this exercise?
-see next slide too!-
Slide 17 - Diapositive
How to solve this exercise? Like this:
FIRST WORK THEM OUT; ONLY THEN YOU CAN MAKE PAIRS!
Slide 18 - Diapositive
FIRST WORK THEM OUT; ONLY THEN YOU CAN MAKE PAIRS!
Okay, let's do a bit together now:
1. x =
So now it is obvious that formula 1 and formula 7 are equal!
When doing 21 for homework, work them all out and only then combine them!
Slide 19 - Diapositive
Homework time.
Do §12.3 now.
Slide 20 - Diapositive
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