710
I dunno (piefed.cdn.blahaj.zone)
submitted 9 months ago by [M] to c/science_memes@mander.xyz
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[–] 18 points 9 months ago* (last edited 9 months ago) (3 children)

Hrmm.

I read that as resulting in 21.

My education system did fail me.

I plugged that into ghci as 2+5*(8-5), and it says 17.

:(

I did (2+5)*(8-5).

Doh.

[Edit: (Double doh! Mistyped that here as 5+2. XD)]

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  • [–] 19 points 9 months ago (2 children)

    You do parenthesis first and then multiplications and then sums, you did parenthesis, then sums, then multiplications, wich is wrong.

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  • [–] 2 points 9 months ago (1 child)

    You don't necessarily have to do parentheses first. What matters is that the things inside the parentheses are a group that you can't break apart. If you have 10÷2+3-2*(2+1) you can do the division first 5+3-2*(2+1) then the addition outside the parentheses 8-2*(2+1) It's just that before you do the multiplication of the term outside the parentheses, you have to handle the parentheses group, so you get 8-2*3 -> 8-6 -> 2

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  • [–] 0 points 8 months ago

    You don’t necessarily have to do parentheses first

    Yes, you do necessarily have to do it first

    What matters is that the things inside the parentheses are a group that you can’t break apart

    And outside, and you must do them first. You haven't finished Brackets until you have 5(8-5)=15.

    10÷2+3-2*(2+1) you can do the division first

    only because you've separated that part with a plus sign

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  • [–] 12 points 9 months ago (1 child)

    plugged that into ghci as 5+2*(8-5), and it says 17.

    You might want to report that error. Or, did you mean 2+5*(8-5)?

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  • [–] 7 points 9 months ago* (last edited 9 months ago) (1 child)

    Oops! Typo. School failed me hard!

    [Edit: Thanks. Corrected that.]

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