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submitted 1 year ago by Toes@ani.social to c/196@lemmy.blahaj.zone
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[-] Razzazzika@lemm.ee 14 points 1 year ago

... the one on the right is correct.... that's a jank ass calculator on the left that doesn't know how to do order of operations 8/2×(2+2) 8/2x4 4x4 16

[-] force@lemmy.world 6 points 1 year ago* (last edited 1 year ago)

There isn't a multiplication symbol though. By your logic something like 8÷2x would mean (8÷2)*x because order of operations

Or if you read 8÷2√x as (8÷2)*√x

Just notate 8÷2(2+2) as 8÷2x; x=(2+2) and you get it, you can substitute any complete expression with a variable in an equation and the logic stays the same.

[-] Eezyville@sh.itjust.works 3 points 1 year ago

You know sometimes both are correct.

[-] SmartmanApps@programming.dev 1 points 1 year ago

You know sometimes both are correct

Nope. That's what the order of operations rules take care of.

[-] SmartmanApps@programming.dev 1 points 1 year ago

the one on the right is correct

No, it isn't.

8/2×(2+2)

...isn't the same thing as 8/2(2+2). You separated the term in the denominator, leading the (2+2) to get flipped into the numerator, hence wrong answer.

[-] Razzazzika@lemm.ee 1 points 1 year ago

That would be 8/(2x(2+2)) if we were keeping it all in the denominator. Multiplication happens in the numerator if there are no parenthesis to distinguish it. If thr equation was written like this:

8


2x(2+2)

Then you would also be correct, but I have to respectfully disagree with your analysis.

[-] SmartmanApps@programming.dev 1 points 1 year ago* (last edited 1 year ago)

That would be 8/(2x(2+2)) if we were keeping it all in the denominator

(2x(2+2)) is the same thing as 2(2+2)

I have to respectfully disagree with your analysis

Which means you disagree with how Maths textbooks teach how to do this (see previous link).

this post was submitted on 03 Dec 2023
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