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Here's how I solved it.
48÷2(9+3) = ?
48÷2(12) = ?
24(12) = ?
288
@Pimpsy: its so controversial around the internet due to people around the world being taught different order of operation methods. Some people stay strict to PEMDAS and do it in that order, which leads to an answer of 2. Other people follow another version of PEMDAS which states the operations in the groupings MD and AS have no precedence over each other, and should be taken out left to right. That method will lead you to 288.
That's why I'm so curious on everyone's take. Please vote in the poll everyone.
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It's not controversial, you did it wrong still. 48/2(12) still has 2*12 as the dominating factor. Your other version is incorrect. Multiplication allways takes dominance, you can't have two different answers, that's a fact.