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Associative Property of Addition :
If a, b and c are three whole numbers, then
a + ( b + c ) = ( a + b ) + c
In other words, in the addition of whole numbers, the sum does not
change even if the grouping is changed.
For any three whole numbers a, b and c, a + (b + c) = (a + b) + c
This is called the Associative-Property of Addition for the set of W.