Quote:
Originally Posted by eroticsexxx
Even Doctor Peterson, in your cited example, lends credibility to the implied multiplication rule and states that the rule is used in some texts. The Math Phd does not merely support your side of things.
Bottom line: You can't "drop" parentheses willy nilly, you have to complete the implied multiplication first.
The date of your quoted example is also telling - (1999). Standards in this year of 2011 state that implied multiplication is possible through parentheses which takes priority over other functions. When you have a number outside parentheses it implies that you multiply the outside by the value of the inside.
So when you simplify 48÷2(9+3) you get 48÷2(12) not 48÷2*12 because you haven't multiplied 2 by (9+3), now (12), yet. Keep your parentheses! Only drop them after completing the implied multiplication. 48÷2(12) = 48÷24 = 2
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The answer to math questions doesn't change over time.
The answer could have been from 1903 and it wouldn't have made a difference.
Read what the MATH PHD says: you go from left to right if there are no brackets.
Therefore 288 is the answer.
Yes the math phd does credit the other way of doing things, the first thing he/she says is that the way I showed above is the right way.
You also can drop parenthesis willy nilly when they don't mean anything. You can also add them. (48) ÷ (2)((9)+(3)) is the same question as above.
Adding brackets around a number doesn't change the number.