Hi! Nice blog post. Since you asked for feedback I'll point out the one thing I didn't really understand. You explain the difference between the calculators by showing excerpts from the manuals and you highlight that in the first manual, implicit multiplication is prioritised. But the text you underlined only refers to implicit multiplication involving special expressions(?) like pi, e, sqrt or log, and nothing about "regular" implicit multiplication like 2(1+3). So while your photos of the calculator results are great proof that the two models use a different order of operations, to me the manuals were a bit confusing since they did not actually seem to prove your point for the example math problems you are discussing. Or maybe I missed something?

I've seen a calculator interpret 1 ÷ 2π as ½π which was kinda funny

This is a very nice piece that had so much information I did not know. Toward the top of the article I was wishing for footnotes, references or something that would indicate it was not just your opinion, but as I got further into the piece you provided so many great references. I thought the calculator manuals were particularly accessible and convincing. Thanks for a great read!

What the heck are you all fighting about? It’s BODMAS.

That's cool and Imma let you finish but I'm not a mathematician and the answer is 9.

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I am so glad that nothing I do in life will ever cause this problem to matter to me.

The way I was taught in school, the answer is clearly 1, but I did read the blog post and I understand why that's actually ambiguous.

Fortunately, I don't have to care, so will sleep well knowing the answer is 1, and that I'm as correct as anyone else. :-p