Quote:
Originally Posted by winders
That depends solely on what conventions you are using. Geary is using a convention that states implicit multiplication (juxtaposition) has precedence over division or explicit multiplication.
Using that convention, this is true:
48÷2(9+3) = 48÷[2x(9+3)] = 2
Again, this is not about the associative property.
Scott
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unfortunately that is not true
the basic properties are the foundation of all mathematics, it's when people make up rules that confusion and inconsistent results pop up
I suggest that you go rear a basic math text
the associative property is the only one that allows the addition of a parentheses that was not explicitly written in the problem
it is usually given as abc =(ab)c =a(bc) or a+b+c = (a+b)+c = a+(b+c)
it allows the introduction of a parenthesis so as to alter the order of operations, it is
not allowed when division and subtraction are involved. This is the only way a parentheses can be added to an expression.