Rational number

From Wikiversity
Jump to navigation Jump to search
The rational numbers (ℚ) are included in the real numbers (ℝ), and in turn include the integers (ℤ), which include the natural numbers (ℕ)

A rational number is any number that can be expressed as the quotient or fraction of two integers, a numerator p and a non-zero denominator q.[1]

Examples[edit | edit source]

  1. 5
  2. 0.2

Notice the number 5 in second example! It is because all numbers are divisible by 1 and at such it is actually but it is more convenient to write it as 5. Note Though all numbers are divisible by 1 some numbers are considered irrational ie they cannot be represented in the form also note that it impossible to have a number with 0 as the denominator (b must not be equal to 0 in ).

Operations Involving Rational Numbers[edit | edit source]

Addition[edit | edit source]

+ =

Subtraction[edit | edit source]

- =

Multiplication[edit | edit source]

=

Division[edit | edit source]

÷ = = .

See Also[edit | edit source]

References[edit | edit source]