numbersystem

1. NUMBER SYSTEM

2. NUMBER• A number is a mathematical object used to
count, measure and label. The original examples
are the natural numbers 1, 2, 3, and so forth. A
notational symbol that represents a number is
called a numeral. In addition to their use in
counting and measuring, numerals are often
used for labels (as with telephone numbers), for
ordering (as with serial numbers), and for codes
In common usage, the term number may refer to
a symbol, a word or a mathematical abstraction.

3. CLASSIFICATION OF NUMBERS

4. NATURAL NUMBERS
• A natural number is a number that
occurs commonly and obviously in nature.
As such, it is a whole, non-negative
number. The set of natural numbers,
denoted N, can be defined in either of two
ways: N = {0, 1, 2, 3, ...}

5. WHOLE NUMBERS
•Whole Numbers are
simply the numbers 0,
1, 2, 3, 4, 5, ... (and so
on)

6. INTEGERS
• A number with no fractional part.
Includes:
• the counting numbers {1, 2, 3, ...},
• zero {0},
• and the negative of the counting numbers {-1,
-2, -3, ...}
We can write them all down like this: {..., -3, -2,
-1, 0, 1, 2, 3, ...}
Examples of integers: -16, -3, 0, 1, 198

7. RATIONALS
• In mathematics, a rational number is
any number that can be expressed as
the quotient or fraction p/q of two
integers, p and q, with the
denominator q not equal to zero.
Since q may be equal to 1, every
integer is a rational number.