Question

How do you simplify `abs21`?

Answer 1

`|21|=21`

Explanation:

`|a|` is called the absolute value or modulus of the number `a`. It represents the distance of the point from origin to its location on the real number line (if the number is real).

As it is 'distance', it is always positive. For example absolute value of a negative number say `-8` is written as `|-8|` and is equal to `8`.

It is apparent that absolute value of zero is zero and that of a positive number will be positive.

Hence `|21|=21`.