fractions are used in the English system of mesurement (inches, feet, pounds, etc.)
Any one - it will depend on the situation.
If you are talking about the fraction bar in mathematics, the "fraction bar" is the real name. It is sometimes called a vinculum (although this is a misuse of the word). The fraction bar in amateur radio, also known as the forward slash is officially known as the "fraction bar."
because then there would be too much water use.
Unless you are an electrical engineer or a math teacher, every number you will ever use in a real world situation will be a real number.
the fraction 22/7 is a close approximation to 3.14159265
Well, since there is no such thing as a sphare in the real world, it is a bit hard to tell what it can or cannot use.
use a absolute value to represent a negative number in the real world
Yes
use a absolute value to represent a negative number in the real world
you wouldn't
the bunnies :)
to keep rythm