Can the square energy of a rational number be any number?

Some examples are given of the concepts of prime, real, rational, irrational, divisor, and common multiple The more detailed the example, the better.

Prime:2,3,5,7,11... Real number: e.g.1,49,3/2,8/9, root 3/2, pie... Rational number: a number that can be expressed as n/m (m=0, n is rational number). For example:1,6,3/2,7/6... Unjustified number: infinite non-recurring decimals such as 1.2897728944327212141897... 、1.899773897488...

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6. What is integer, natural number, positive fraction, negative fraction, positive integer, negative integer, rational number Also, are all decimals fractions? If they are classified, do they fall into the positive/negative fractions? Although I was in junior high school, but these little knowledge have forgotten? What is integer, natural number, positive fraction, negative fraction, positive integer, negative integer, rational number Are all the decimals also fractions? If they are classified, are the decimals fall into positive/negative fractions? Although I was in junior high school, but these little knowledge have forgotten?
7. If the sum of two rational numbers is larger than the sum of any one of them, then the two rational numbers ()()()()()()() If the sum of two rational numbers is larger than the sum of any one of them, then the two rational numbers ()()()()()()()()
8. If the sum of two rational numbers is less than each addend, then the two numbers must be positive. 4. One is negative 2. If the sum of two rational numbers is negative, then the number must be () 1. Both are positive numbers 2. Both are negative numbers 3. One is positive and one is negative.4. At least one is negative The addition step of rational number is: the first step is to determine the __________ of sum, and the second step is to determine the __________ of sum
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