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13 Cards in this Set
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Variable

A letter or symbol that represents a number

Algebraic Expressions

Numbers formed together with the operations addition, subtraction, multiplication, division, raising to powers or roots.

Natural Numbers

{1,2,3,4...}
Any positive number higher than 0 
Whole Numbers

{0,1,2,3,4...}
Any positive number including 0 
Integers

{...4,3,2,1,0,1,2,3,4...}
Any number Positive AND negative 
Set Builder Notation

Describes the members of the set but does not list them
{xx is a natural number less than 3} 
Roster Form

Lists what is described in the Set Builder Notation
{1,2} 
"E" or "is an element of"

Symbol to show if a number is an element of a set
3E {1,2,3,4,5} 
Real Numbers

Any point on the number line

Rational Numbers

a/b
a and b are integers and b =/ 0 
Irrational Numbers

a real number but express doesnt make sense
5/0= irrational 
Subset

Smaller group of numbers which belong to a bigger Set

Absolute Value

Distance on the number line
Always positive 