Question

Karim and Ali looked at the following expression and made a comment:

2 - 3 = (-1)
Karim = Whole numbers are not closed under subtraction.
Ali= Integers are closed under subtraction.

Why do they have different conclusions about the closure property for whole numbers and integers?

Answer 1

Explanation:

-1 is not a whole number so Karim is right.

-1 is an integer so Ali is also right.