Rational numbers

The rational numbers ($\mathbb{Q}$) are included in the real numbers ($ℝ$), while themselves including the integers ($\mathbb{Z}$), which in turn include the natural numbers ($\mathbb{N}$)

A rational number is a number that can be expressed as the quotient or fraction Template:Math of two integers, a numerator Template:Math and a non-zero denominator Template:Math. The set of all rational numbers, also referred to as "the rationals", the field of rationals, or the field of rational numbers is usually denoted by a boldface Template:Math (or blackboard bold $\mathbb{Q}$, Unicode Template:Unichar, or Template:Unichar).

Lessons

• /Introduction/
• /Advanced Study/

See Also

• Wikipedia: Rational number