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The additive identity for rational numbers is 0. It is the only rational number such that, for any rational number x,

x + 0 = 0 + x = x

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Q: What is meant by additive identity in rational numbers?
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What is the sum of any rational number and its opposite explain?

If the opposite is meant to be the additive opposite and not the multiplicative opposite, then their sum is zero. The reason is that is what defines an additive opposite!


What is the set of counting numbers and their opposites?

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I cannot see any numbers. If I were to guess what numbers were meant to be in the question then I may as well make up my own questions and answer them!


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Is an integer always a rational number?

a rational number is an integer when it does not have a decimal. An integer is a whole number, no parts of a number... -3, -2, -1, 0, 1, 2, 3 are all integers 2.14 and 6.789 are rational numbers but not integers. see the pattern?


What is every positive number and its negative pair called?

That would be the set of all non-zero numbers. If by number you actually meant whole numbers, that is integers, then it would be the set of all non-zero integers. They are also called Additive Inverses. For example, -5 is the additive inverse of 5, because 5 + (-5) = 0. Similarly, 7 is the additive inverse of -7 because (-7) + 7 = 0.


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A rational number can be expressed as a fraction whereas an irrational number can't.


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-- First of all, the space "between 5 and 5" is zero, so there are no numbersof any kind in there.Let's assume that you meant to type "5 and 15".-- A lot of people don't realize that any number you can completely write downon paper is rational. So just pick any numbers you like in that range, write themdown on paper, and you'll have your list of rational numbers.


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0.5555 is rational. If, however, you meant 0.5555..., meaning the 5's repeat forever, then it is irrational.


What is numerical set?

A numerical set would be a set whose members are numbers: {5, -3, 0, 3/7, sqrt(2), pi, ...}. Your question might also be answered by explaining what is meant by the sets of Natural numbers, Whole numbers, Integers, Rational numbers, etc. If that's what you're looking for, it's a longer story . . .


Why are all interfere rational numbers give an example?

There is no such word as "interfere". I cannot guess what you might have meant to say: if doing that I may as well ask my own question and answer it. So, please check your spelling and resubmit.