What is the definition of opposite numbers?

Answer 1

The additive opposite of a positive is a negative, and the opposite of a negative is a positive. If you reverse the sign twice (opposite of opposite) you have the original number.

The same applies to an inverse (multiplicative opposite): the inverse of any inverse for a nonzero number is the original number. n (1/n)(n) = n

Answer 2

Is an opposite of a number like the opposite of n is -n

It is ether the Positive or Negitive Value of a number.

EX: 13 the opposite of this is -13.

Answer 3

To number that are the same but have different signs. Example 3 and -3 are opposite numbers.

Answer 4

-98