Question

Which of the following sets contains -4.5?
Irrational Numbers
Integers
Natural Numbers
Rational Numbers

Answer 1

http://www.math.utah.edu/online/1010/numbers/numbers.gif

Answer 2

Natural number are the "counting" numbers, 1, 2, 3,... etc.

Integers are the natural numbers + 0 + the negatives of the natural numbers, so .... -2, -1, 0, 1, 2.... etc.

Rationals are any numbers that can be written in the form p/q where p and q are integers. So 2/3, 27/4, -11/3, etc.

And irrational are any numbers that can NOT be written as p/q where p and q are integers. For example, \(\pi,\sqrt{5}\), etc.

So, what do you think? Where does -4.5 fit in that?