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Q: Are whole numbers closed with respect to multiplication?

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no

Yes.

Yes.

If you can never, by multiplying two whole numbers, get anything but another whole number back as your answer, then, YES, the set of whole numbers must be closed under multiplication.

Yes, the whole numbers are closed with respect to addition and multiplication (but not division).The term "whole numbers" is not always consistently defined, but is usually taken to mean either the positive integers or the non-negative integers (the positive integers and zero). In either of these cases, it also isn't closed with respect to subtraction. Some authors treat it as a synonym for "integers", in which case it is closed with respect to subtraction (but still not with respect to division).

whole numbers

l think multiplication

If you mean the set of non-negative integers ("whole numbers" is a bit ambiguous in this sense), it is closed under addition and multiplication. If you mean "integers", the set is closed under addition, subtraction, multiplication.

The numbers are not closed under addition because whole numbers, even integers, and natural numbers are closed.

When you combine any two numbers in a set the result is also in that set. e.g. The set of whole numbers is closed with respect to addition, subtraction and multiplication. i.e. when you add, subtract or multiply two numbers the answer will always be a whole number. But the set of whole numbers is NOT closed with respect to division as the answer is not always a whole number e.g. 7÷5=1.4 The answer is not a whole number.

They form a closed set under addition, subtraction or multiplication.

Yes, it is closed. This means that if you multiply two even number, you again get a number within the set of even numbers.

Because if X and Y are any two whole number, then X*Y is also a whole number. Always.

Yes.

No. Since -1 x -31 (= 31) would not be in the set.

Yes. Multiplication of integers, of rational numbers, of real numbers, and even of complex numbers, is both commutative and associative.

Multiplication is nothing but repeated addition.We multiply whole numbers by referring to their multiplication tables and also by multiplying first the layer digit, then carrying off and then multiplying all the digits successively.

1 is a whole number. It is the identity element with respect to multiplication but not addition.

Yes. When you add any whole numbers you get another whole number. That is what closed means in this context. The answer is still a whole number.

It depends on your definition of whole numbers. The classic definition of whole numbers is the set of counting numbers and zero. In this case, the set of whole numbers is not closed under subtraction, because 3-6 = -3, and -3 is not a member of this set. However, if you use whole numbers as the set of all integers, then whole numbers would be closed under subtraction.

The set of whole numbers is not closed under division (by non-zero whole numbers).

The whole numbers are not closed under division! The statement is false since, for example, 2/3 is not a whole number.

Yes.

Yes they are.

They are whole numbers used in division, multiplication, addition and subtraction.