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Glitch in the matrix (ani.social)

submitted 11 months ago by [email protected] to c/[email protected]

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[–] [email protected] 14 points 11 months ago (3 children)

... 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

[–] [email protected] 6 points 11 months ago* (last edited 11 months ago) (1 children)

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.

[–] [email protected] 3 points 11 months ago (1 children)

You know sometimes both are correct.

[–] [email protected] 1 points 8 months ago

You know sometimes both are correct

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

[–] [email protected] 1 points 8 months ago (1 children)

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.

[–] [email protected] 1 points 8 months ago (1 children)

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:

2x(2+2)

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

[–] [email protected] 1 points 8 months ago* (last edited 8 months 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).