# Rational numbers *Negative integers. Series of negative
integers. * *Fractional negative numbers. Positive numbers. * *Rational numbers.*
**Negative integers** appear, when the greater integer is subtracted from the smaller one, for instance: 10 – 15 = – 5 . The sign “minus” before 5 shows, that this number is negative. *Series of negative integers* continue endlessly:
–1, –2, –3, – 4, –5, … * Integers *are natural numbers, negative integers and zero:
... ,
–3, –2, –1, 0, 1, 2, 3, ...
*Fractional negative numbers
* appear, for example, when the greater number is subtracted from the smaller one:
Also it is possible to say, that fractional negative numbers appear as a result division of a negative integer by a natural number:
*Positive numbers* in contrast to *negative numbers *
(integers and fractional ones), are the numbers, considered in * arithmetic*** **(also integers and fractional ones).
*Rational numbers* –
positive and negative numbers (integers and fractional ones) and zero. The more exact definition of rational numbers, adopted in
mathematics, is the following: *A number is called ***rational**, if
it may be presented as a vulgar, not a *cancelled fraction of the shape:* *m / n* , *where
** m * *is an integer, and*** n ** is a natural number. Back |