Answer:
-10 belongs to the set of negative integers and rational numbers thus belongs to the set of real numbers also.
Explanation:
A rational number is a number that can be expressed as a fraction
where p and q are integers and

Negative integers are the numbers less than zero but not a fraction and is written with a minus sign. example = -2 , -99 , -40 etc.
Real numbers includes all rational numbers , integers, irrationals, natural numbers, whole numbers.
Thus, the given number -10 belongs to the set of rational numbers and -10 can be written as
where -10 and 1 are integers and
.
also, -10 belongs to the set of negative integers.
Thus, -10 belongs to the set of negative integers and rational numbers thus belongs to the set of real numbers also.