Rational numbers

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

A rational number is a number that can be expressed as the quotient or fraction p/q of two integers, a numerator p and a non-zero denominator q. 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 Q (or blackboard bold ${\displaystyle \mathbb {Q} }$, Unicode U+1D410 𝐐 MATHEMATICAL BOLD CAPITAL Q, or U+211A ℚ DOUBLE-STRUCK CAPITAL Q).^[1]

Lessons

• Introduction
• Advanced Study

See Also

• Wikipedia: Rational number

References