Rules that help you add faster
Properties of addition are rules that always work. Commutative property: changing the order of the addends does not change the sum. For example, 3+5=5+3. Associative property: you can group two neighboring addends and replace them by their sum. For example, (2+3)+4=2+(3+4). These properties help you choose a convenient way to add.
Commutative: a+b=b+a
Associative: (a+b)+c=a+(b+c)
You can add in any order that makes sense
Example: 7+8+3=7+3+8=10+8=18
Commutative property
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