Negative three is a rational number.
Yes, it is.
It is the positive value of that rational number.
Yes to all three.
No, -5 is a negative, rational number.
You use a negative rational number when an answer is below zero.
The negative of a rational number is also rational.
Any rational positive number is still rational when you make the same number negative.
It is the smallest non-negative rational number. Negative numbers are rational and are smaller.