Yes.
Rational: yes. Natural: no.
5 = 5/1 is a rational number
Yes, -1/2 is a rational number
Yes.
There is no such number. If any number laid claim to being the smallest rational number its claim could be challenged by half that number - which would also be rational and, obviously smaller. And the claim of that number could be challenged by half that number, and so on.
Rational: yes. Natural: no.
5 = 5/1 is a rational number
Yes 1/2 is a rational number
yes
No, it cannot. The product of a rational and irrational is always irrational. And half a number is equivalent to multiplication by 0.5
As a number which can be expressed as a fraction, 1/2 is a rational number.
Yes, -1/2 is a rational number
rational number
Yes.
There is no such number. If any number laid claim to being the smallest rational number its claim could be challenged by half that number - which would also be rational and, obviously smaller. And the claim of that number could be challenged by half that number, and so on.
Yes it is.Rational numbers can be written are fractions. three is a rational number.
Yes - any integer, including 3, is a rational number.