if both have the same sign the answer is positive, if they have different signs the answer is negative.
They are not the same!The set of integers is closed under multiplication but not under division.Multiplication is commutative, division is not.Multiplication is associative, division is not.
negetive integers are not closed under addition but positive integers are.
The answer depends on which binary operation you mean when you say "combining". Addition, subtraction, multiplication, division, exponentiation, etc.
Rule 1: The term is integer, not interger.Rule 2: The answer depends on what you want to do with it or them.
No, they are not.
One rule is that the product of two integers with unlike signs will have a minus sign for the product.
The rule in dividing integers is to divide the absolute values. Two positive integers or two negative integers equals positive product. If one integer is positive and the other is negative, the product is negative.
I am not sure there are any fundamental operations of integers. The fundamental operations of arithmetic are addition, subtraction, multiplication and division. However, the set of integers is not closed with respect to division: that is, the division of one integer by another does not necessarily result in an integer.
Yes, it can!
2x2=5
The set of rational numbers is closed under division, the set of integers is not.
They are not the same. You can multiply by zero but division by zero is not defined.