"Real"
Numbers do
not include imaginary or
complex
numbers.
Only the following types
of numbers are
"real"
numbers:
Rational
Numbers:
Rational numbers are
numbers which can be
represented by a
ratio (a fraction).
Fractions
All
Fractions . .
.
Decimals -
two separate types of
decimals are rational
numbers
only
terminating and repeating
decimals . . .
(Non-terminating,
non-repeating decimals
such as π (≈
3.14159...), Euler's
mathematical constant
e (≈
2.71828...), or √2
(≈ 1.4142...) are
not rational numbers.
They are called
irrational numbers.)
Natural
Numbers -
(counting numbers)
1, 2,
3, 4, 5, . . .
Whole
Numbers -
(counting numbers plus
zero)
0, 1,
2, 3, 4, 5, . .
.
Integers -
(whole numbers plus
negative whole
numbers)
. . .
-5, -4, -3, -2, -1, 0, 1,
2, 3, 4, 5, . .
.
Irrational
Numbers:
Irrational numbers
are numbers whose
decimal equivalent
is non-terminating
and does not have a
repeating pattern.
The following
examples
of "real"
numbers are
shown on the
number line ,
below:
Return
To
"Top of
Page"
click
here
Rational
Numbers:
examples:
Fraction

Decimal
-1.5
Natural
Number
8
Whole
Number
0
Integer
-4
Irrational
Number:
example:


Number
Line