BODMAS or PEMDAS

[Han]

(03-25-2015 03:01 AM)lloydc61 Wrote:  Well it seems that even the HP Prime cannot decide which is the correct way to solve. If I enter as written whilst in "Algebraic" entry mode I get 9 as the answer. But if I then use "Textbook" entry mode I get 1 as the answer. This seems to fall into the great debate as to whether you use BODMAS or PEMDAS.

BODMAS vs PEMDAS ... I'm not sure I see any distinction other than using synonyms. [B]rackets are [p]arentheses, and [o]rders are [e]xponents. DM vs MD ... there's no difference, esp. if you think of division as being multiplication of inverse (would would be [e]xponent/[o]rder of (-1) followed by multiplication -- I suppose that would also be a [p]arentheses/[b]racket first if we want to be really technical about division)

As for algebraic mode vs textbook mode... shouldn't they behave differently (just like RPN behaving differently from either)? Otherwise they'd just be the same mode, right? Moreover, they're entry modes, not an implementation of order of operations (which is actually the same for all modes, and occurs after completed entry).