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#1 |
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Gordo's first answer was right. I just got out of an algebra class and order of operations says Please Excuse My Dear Aunt Sally... |
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#6 |
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I got a B at GCSE maths which i know isn't bad (that said, the school almost collapsed shortly after for poor results, but anyway...), yet I also know I never had to apply a left to right rule to answer anything given by a teacher or exam. There would always be brackets etc. You are never going to need to apply any kind of maths in a real world situation where left to right plays any part. It's also obviously a little bit of a grey area if many calculators get it wrong.
I'd almost say 279 isn't right because all rules like BODMAS state brackets are solved first. So 12 and 6 are added then multiplied by the 4. Or 12 is multiplied by 4, and added to 6 multiplied by 4. As in, brackets expanded first. Even Google calculator has to add brackets to answer the question. The fault is in the question. Left to right is something made up to be able to solve poorly written problems. |
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#7 |
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I'd almost say 279 isn't right because all rules like BODMAS state brackets are solved first. So 12 and 6 are added then multiplied by the 4. Or 12 is multiplied by 4, and added to 6 multiplied by 4. As in, brackets expanded first. Brackets 62÷4x18 Division 15.5x18 Multiplication 279 For some reason when i first did it in my head i did multiplication before division like others. |
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#8 |
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#10 |
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#19 |
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#20 |
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