Ms. Garcia Math
	The Real Number System	Show/Hide
	This set includes all numbers that can be written as a decimal. This includes fractions written in decimal form e.g., 0.5, 2.1, etc. It also includes all the irrational numbers such as π, e, √2 etc. Every real number corresponds to a point on the number line.
	Natural Numbers (N).	Show/Hide
	[The numbers that occurs commonly in nature]. They are the numbers {1, 2, 3, 4, 5, …}
	Whole Numbers (W).	Show/Hide
	This is the set of natural numbers, plus zero, i.e., {0, 1, 2, 3, 4, 5, …}.
	Integers (Z).	Show/Hide
	This is the set of all whole numbers plus all the negatives (or opposites) of the natural numbers, i.e., {… , -2, -1, 0, 1, 2, …}
	Rational numbers (Q).	Show/Hide
	This is the set of all the fractions, where the top and bottom numbers are integers; e.g., ¼, ½, ¾,… [Note: The denominator cannot be zero].
	Irrational Numbers	Show/Hide
	This is the set numbers that cannot be written as a simple fraction. (They have have decimal expansions that neither terminate nor become periodic)
	Number Line	Show/Hide
	It is a straight line with numbers placed at equal intervals along its length.