## Key Questions

• Integers are positive and negative whole numbers (-3, -2, -1, 0, 1, 2, 3...).

They can be thought of as "nice numbers" as they are real and are not fractions or decimals.

$\left(a + b\right) + c = a + \left(b + c\right)$

I hope that this was helpful.

• The commutative property of addition means that it does not matter what order in which you add numbers. You will get the same answer either way. It is represented as a + b = b + a, in which a and b are real numbers. However, the property is not limited to two numbers.

Examples:

1. 2 + 4 = 6 and 4 + 2 = 6

2. 3 + 1 + 8 = 12, and 8 + 1 + 3 = 12, and 1 + 8 + 3 = 12, etc.