Sets of Numbers
Natural Numbers are the counting numbers 1, 2, 3,…
Whole numbers start at 0: 0, 1, 2, 3, …
Integers are positives and negatives -1, 0, 1, …
Rational are fractions and finite decimals or repeating decimals like .333333…. or .5
Irrational are the weird numbers, the infinite decimals, pi, roots that are not perfect
Real all the above
Properties: Commutative-order does not matter, Associative-grouping does not matter, identity + (a
number add to 0 is always the number) identity x (a number multiplied by 1 is still that number) inversedo the opposite to get 0 (+) or 1 (x), distributive