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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