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  • 39 Comments
Joined 1 year ago
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Cake day: July 1st, 2023

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  • Perfide@reddthat.comtoMemes@lemmy.ml6÷2(1+2)
    ·
    8 months ago

    No, those companies aren't wrong, but they're not entirely right either. The answer to "6 ÷ 2(1+2)" is 1 on those calculators because that is a badly written equation and you(not literally you, to be clear) should feel bad for writing it, and the calculators can't handle it with their rigid hardcoded logic. The ones that do give the correct answer of 9 on that equation will get other equations wrong that it shouldn't be, again because the logic is hardcoded.

    That doesn't change the fact that that equation worked out on paper is absolutely 9 based on modern rules of math. Calculate the parentheses first, you then have 6 ÷ 2(3). We could solve from here, but to make the point extra clear I'm going to actually expand this out to explicit multiplication. "2(3)" is the same as "2 x 3", so we can rewrite the equation as "6 ÷ 2 x 3". All operators now inarguably have equal precedence, which means the only factor left in which order to do the operations is left to right, and thus division first. The answer can only be 9.


  • Perfide@reddthat.comtoMemes@lemmy.ml6÷2(1+2)
    ·
    edit-2
    8 months ago

    You lost me on the section when you started going into different calculators, but I read the rest of the post. Well written even if I ultimately disagree!

    The reason imo there is ambiguity with these math problems is bad/outdated teaching. The way I was taught pemdas, you always do the left-most operations first, while otherwise still following the ordering.

    Doing this for 6÷2(1+2), there is no ambiguity that the answer is 9. You do your parentheses first as always, 6÷2(3), and then since division and multiplication are equal in ordering weight, you do the division first because it's the left most operation, leaving us 3(3), which is of course 9.

    If someone wrote this equation with the intention that the answer is 1, they wrote the equation wrong, simple as that.



  • Perfide@reddthat.comtoMemes@lemmy.mlEarth has a cold
    ·
    9 months ago

    Cold winter? We used to get blizzards in October here, now we barely get any snow at all throughout the entirety of winter, and it's frequently warm enough to be comfortable outside in nothing but a shirt and shorts.

    I swear every single year people forget how actually mild winter has become. It got down to -50F here once years ago thanks to the polar vortex and ever since most everyone starts on how "it's gonna be a really cold winter this year" everytime it drops to the fucking 40-50F range. When you point out they said the same thing last year and it was even milder than when they said it 2 years ago, they often just double down being willfully ignorant and insist last winter was "soooo bad" despite it being warmer on average than Fall was 15 years ago.


  • Perfide@reddthat.comtoMemes@lemmy.mlSurprised Pikachu
    ·
    9 months ago

    The last straw for me was about a decade ago when an update completely broke Chrome on my machine. It would open and immediately crash, even after reinstalling. Everything else worked fine, virus scans came back clean and everything, it was only Chrome. I spent the next 2 months playing browser roulette before settling on ol' reliable Firefox once again.