3. Go and find one other person in this class.
◦ Introduce your self (name), family, and what city do
you live in.
◦ Together, you must create a short list of:
2 ways Math (all Math but extra credit for
Algebra/Geometry) is used in real life.
2 things you don’t understand or don’t like about
Math.
Now, we will take turns and introduce each
other.
4. Important things to note:
◦ Phone number – please call if you can’t attend
◦ Blog – I will post interesting and informative info
here. You can use JCAE computers to access this
when you are in class.
◦ Things you need for class
◦ Homework – I will try to keep it to a minimum but
you need to practice your skills.
5. My favorite Algebraic expression is:
-3x2
This has 4 parts:
Sign
Coefficient
Variable
exponent
Every variable has all of these parts
Consider y What are the values of the 4 parts?
6. Variables are simply letters which
take the place of a number
Variable can stand for anything
and they can change (therefore
they name – variable)
They are the mystery that we are
trying to solve
We solve the mystery by getting
the variable by itself.
7. Inverse means “Opposite”
Opposite of Addition is
Subtraction
Opposite of Multiplication is
Division
8. Integers are positive and negative
numbers
◦ Think of a number line or a thermometer
To add integers with the same
signs, you just add and keep the sign.
For example, +2 + (+12) = +14
- 6 + ( -4) = -10
9. Consider that +5 + (-5) = 0
◦ If I gave you $5 then took it back you would have
$0. This is called a zero pair.
We are going to “pair up” the positives and
negatives to see what is left
For example: -7 + 5 =
10. -7+5=
Would look this
= -2
So, the rule is you find the difference of the
numbers (subtract) and the bigger number
makes the sign.
