associative property

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as·so·ci·a·tive property

The property of addition and multiplication which states that a difference in the grouping of numbers being added or multiplied will not change the result, as long as the order of the numbers stays the same. For example, 3 + (4 + 5) is equal to (3 + 4) + 5. See also commutative property, distributive property.
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He uses everyday examples and common sense to explain absolute value to antiparticles to associative property to binary systems and on to common denominators, division, fractions, graphing, irrational numbers, number lines, parallelograms, sampling, and variables.