Quote:
Originally Posted by moeloubani
Why would you do 2 * 12 before 48/2 ? What is the variable here?
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You answered my question with a question.
You half reduced 2(9+3), stopped, then inserted it back.
Think of 2(x) as F(x) where
F(x) = x*2
i.e. a number is a function that multiplies itself with it's argument.
then 48/F(9+3)
= 48/F(12) ... apply + operand to parenthesis
= 48/ (12*2) ... apply function F
= 48/24 ... apply * operand to parenthesis
= 2 ... apply / operand