By adding whatever you mean with "integers of a number".
No. A mean is another word for average. Can be negative, positive, or zero. As long as it adds 2 or more integers and divides it by the number of integers.
An integer is any positive or negative whole number
"Whole number" may refer to an integer, or it may refer to a POSITIVE integer. Because of this ambiguity in the definition, it is preferable to talk about integers, positive integers, or non-negative integers, depending on what you mean.
All positive integers are all greater than negative integers.
It is 9.
Positive and negative integers are opposite each other.
By adding whatever you mean with "integers of a number".
Assuming you mean 1-8, that's 840.
No. A mean is another word for average. Can be negative, positive, or zero. As long as it adds 2 or more integers and divides it by the number of integers.
Think of 5 positive integers that have a mode of 4 and 6, a median of 6 and a mean of 7.
An integer is any positive or negative whole number
I am not quite sure what you mean with "work". A positive integer is one that is greater than zero.
Positive integers. Or non-negative integers. No point in arguing, simply ask your teacher which one they mean.
"Whole number" may refer to an integer, or it may refer to a POSITIVE integer. Because of this ambiguity in the definition, it is preferable to talk about integers, positive integers, or non-negative integers, depending on what you mean.
All positive integers are all greater than negative integers.
Unfortunately, the term "whole numbers" is somewhat ambiguous - it means different things to different people. If you mean "integers", yes, it is closed. If you mean "positive integers" or "non-negative integers", no, it isn't.