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AllRefer.com - associative law (Mathematics) - Encyclopedia (Site not responding. Last check: 2007-10-07) |
 | | associative law, in mathematics, law holding that for a given operation combining three quantities, two at a time, the initial pairing is arbitrary; e.g., using the operation of addition, the numbers 2, 3, and 4 may be combined (2+3)+4=5+4=9 or 2+(3+4)=2+7=9. |
 | | More generally, in addition, for any three numbers a, b, and c the associative law is expressed as (a+b)+c=a+(b+c). |
 | | When an operation is associative, the parentheses indicating which quantities are first to be combined may be omitted, e.g., (2+3)+4=2+(3+4)=2+3+4. |
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