Question

Show that integer are closed under addition and subtraction

Answer 1

Answer:

Integers are closed under addition, Subtraction, multiplication, but not division.

Eg 9 ÷ 2 = 4 1/2 . which is a fraction between 2 integers .

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Answer 2

Answer:

3+2=5 5 is a integer thus integers are closed under addition

3-2=1 1 is a integer thus integers are closed under subtraction