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13 Cards in this Set

  • Front
  • Back
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
{x|x 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