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# 2.5: Identify and Apply Number Properties in Decimal Operations

Difficulty Level: At Grade Created by: CK-12
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### Vocabulary Language: English

Associative Property

The associative property states that you can change the groupings of numbers being added or multiplied without changing the sum. For example: (2+3) + 4 = 2 + (3+4), and (2 X 3) X 4 = 2 X (3 X 4).

Commutative Property

The commutative property states that the order in which two numbers are added or multiplied does not affect the sum or product. For example $a+b=b+a \text{ and\,} (a)(b)=(b)(a)$.

Property

A property is a rule that works for a given set of numbers.

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