Working With Integers

An integer is the set of all whole numbers and their opposites.

For example, here is a set of integers {... -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5...}.

The absolute value of a number is the distance the number is from zero.

For example, the absolute value of -4 is 4.  We denote that by writing | -4 | = 4.  -4 is 4 units from zero to its left.

More examples:

|5| = 5

|-100| = 100

Two numbers with the same absolute value but different signs are called opposites.  An integer and its opposite are also called additive inverses.

Adding Integers

Subtracting Integers

Multiplying Integers

Dividing Integers