Order of operations - what is 6÷2(1+2) ?

[rprosperi]

(12-12-2020 02:11 PM)Massimo Gnerucci Wrote:  

(12-12-2020 01:48 PM)rprosperi Wrote:  I've seen people claim this priority, but have never seen this is in any mathematics book, nor ever found a mathematician or teacher that agrees. Do you recall where you learned this or have any reference?

Bob, have a look at the video I linked above.

Wow, really good video, thanks for the link Massimo!

Seems one conclusion is Algebraic calculators are inconsistent and potentially confusing if you just type in an equation as given.

I'll consider sticking with RPN/RPL machines, which require some thought to use. So I can decide on PEMDAS or even PEJMDAS, based on which math teachers I'm trying to appease, but at least I can expect consistent results.

Does anyone here recall being taught PEJMDAS, even if that acronym wasn't used?