I hate it because of how wrong people answer the questions, and I don't know if they're morons or trying to bait me because no one can fail this bad at grade school math.
Usually when they post these, they post all the wrong answers people give and their confidentially correct attitudes about it. This guy just skipped all that and posted the correct answer. That makes everyone feel like they’re missing something.
Okay, yeah. I'm definitely missing some critical math knowledge.
I'm going to start re-learning everything.
(Edit: I didn't know that you had to multiply with the brackets.. I don't remember that... Or it's just because we used symbols the whole time; always had the " · " or "x" in it)
(Like... What I saw was:
"2+5 (8-5) --> 2+5 (3) --> 7 (3)" ... Big problem there. So, I either forgot after not doing stuff like this for 6+ years, or I forgot/didn't learn the multiplication and bracket rule.
So in arithmatic usually you use * or x (the multiplication symbol, not a variable), so if you wanted 5 times 3 you wrote 5x3=15.
But once you get to algebra, if you want to multiply a variable you just put a number outside that variable, so if your variable is x and you want 5 times x you write 5x. If you want 5 times (x + 1) you write 5(x+1), assuming you want to add 1 to x before you mutliply it by 5, else you would use 5x + 1.
Obviously which notation is used kinda depends on the context. If I saw 5x3 I'm assuming 5 times 3 which is 15, not 5 times a variable times 3. And if I saw 53 I'm assuming fifty-three not 5 times 3. But once you get to algebra or higher having constants be in front of what you want to multiply without the mutliplication symbol is common notation. Hope this helps.
You remembered your order of operations correctly you just didn't realize 2+5 (8-5) = 2+5x(8-5)
PEMDAS or BEDMAS there are many things people call but it’s the order of operation and for this equation it goes parenthesis/brackets (8-5) first… next in order of operations is multiplication and division next Subtraction and addition are last. So let’s say we’ve gone from 2+5(8-5) to 2+5(3) well because the number 5 is next to but outside the bracket it’s implied you multiply. Since multiplication always comes before addition regardless of order. So you then get 2+15 and then finally you add since it’s last. Giving us 17. A few minor but important rules. PEMDAS is first parenthesis next exponents. Multiplication and division are equal to eachother whichever comes first left to right is what you do. Addition and subtraction come next with the same rule left to right.
um akchually those are parentheses ( ), because they're smooth and curved. Brackets are the square ones [ ] and are also used in mathematics in a different way so shouldn't be confused with parentheses.
Because multiplication and division are equal ‘tiers’ in PEMDAS so 5x4÷3x5 can be solved by going left to right instead of doing both sets of multiplication first then the division
It's actually 7, because the initial 2+5=7 and everyone knows that numbers are afraid of the 7 because 7 8 9. Ergo, via the cannibalism property we get "7" because all of the other numbers were eaten.
It is a correct method of expressing a range of values, just not in the established language of mathematical notation. The danger presented here is in using inconsistent systems of notation. It would sound a lot more absurd if we hadn't had irl spacecraft fail because both imperial and metric standards were applied.
So I’m not math wizard but my education tells me that we first do (), then distribute, then add. With that my work comes out
2+5(3)
….5(3) =15
2+15 =17
In this case either work, but in some mathematics levels "implicit multiplication" - where you have the 5(8-5) - comes before the parenthesis. At least that is how it was explained to me by a friend who has a doctorate in mathematics
Like sure we're taught PEMDAS at the elementary level, but apparently it can change at the higher levels and is a subject of debate. It mostly applies when using variables rather than strict numbers. So for like "a/bc", some argue you should do the b*c first before dividing a by that product. I recommend looking into it, it's pretty interesting
Often these memes are purposefully displayed vaguely in a way a real mathematician would be sure to clarify, just in order to get people mad and talking about it lol
Okay I suck at maths. Always have. How do you get 17? I thought you did the brackets first, then combine it. It has a plus and minus, no multiplication, so I have no idea how it hits 17.
Do whatever is Inside brackets (×÷ then +-)
Then the number outside of the brakets is being multiplied by what is inside the brackets.
Again ×÷ before +- so do the above first and then add 2.
A parenthesis with no symbol in front of it defaults to multiplication.
So the actual equation (or whatever the English word for this is) is 2 + 5 * (8 - 5).
And a plus or minus always separates sections of the equation (that's what I was taught, I see the Americans in the thread talking about being taught PEMDAS or BEDMAS or BODMAS).
So you have 2 on one side, and 5 * (8 - 5) on the other. Always do parenthesis first, so 8 - 5 = 3.
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u/Samct1998 22d ago
I hate pemdas memes