Answer.
1. Any number containing a minus sign is not a natural or whole number. Natural numbers are whole numbers not including zero (although zero is sometimes included).
2. Any number containing a decimal is not an integer or a natural number or a whole number. In integer can be negative and it can be zero.
3. Rational numbers can be fractions and negative numbers. -2.22 is rational
4. If a number is rational, it is not irrational. -2.22 is not irrational.
5. -2.22 is real. It does not involve the square root of - 1
Rational and Real <<<< Answer.