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The set of integers is closed, commutative and
associative.
By closed we mean when we add, subtract, multiply or
divide 2 integers we get an integer.
When we say commutative it means that no matter what order
we add, subtract, multiply or divide 2 integers we get an integer.
Most of the time you will see real numbers only such as whole
numbers, negative numbers, integers, fractions, decimals and square
roots. But our numbering system also contains imaginary numbers.
Imaginary numbers involve the square root of a negative number. But
for now let’s only focus on real numbers. |
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