Integers
- Addition and subtraction of integers
Integers are closed under addition and subtraction.
For two integers, a and b, a + b and a – b are integers.
For example, (–14) + 3 = –11
(–7) – (–2) = –7 + 2 = –5
- Addition is commutative for integers. For integers, a and b, a + b =b + a
For example, (–7) + 5 = 5 + (–7) = –2
- Subtraction is not commutative for integers.
For example, (–7) – (4) = –11
4 – (–7) = 11
(–7) – …
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