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Number Properties

Here are some very important rules about numbers.

Associative property of addition(a+b)+c = a+(b+c)Parentheses don't matter when adding
Associative property of multiplication(ab)c = a(bc)Parentheses don't matter when multiplying
Commutative property of additiona+b = b+aOrder doesn't matter when adding
Commutative property of multiplicationab = baOrder doesn't matter when multiplying
Distributive propertya(b+c) = ab+acMultiplying a number times a sum equals the sum of multiplying that number times each of the terms of the sum.