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chrischi3 t1_iycvptl wrote

I might be dumb but isn't this exactly how you're supposed to do it? At least that's how i learned it in school.

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xyzerb OP t1_iycwliz wrote

You're correct. There are several mnemonics that work. Some people find GEMS a little easier to remember.

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chrischi3 t1_iycwyte wrote

Though honestly it varies what exactly i use, usually i'll just smear brackets all over the page to help me understand whatever the hell i have infront of me, even if the bracket wouldn't make a difference in the calculation (especially useful in physics class once you get to the point where calculating something turns into a giant block of formulas)

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n4jm4 t1_iycx4jb wrote

Do a bunch of algebra and GEMS becomes second nature.

Do a bunch of coding and operations become bit shifts anyway.

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Darko-TheGreat t1_iycy6g3 wrote

Learning that I could divide by bit shifting changed my life.

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n4jm4 t1_iyd2zbw wrote

With two's compliment and repetition you can divide by addition.

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rocket_beer t1_iycxf05 wrote

The biggest fail are the r/confidentlyincorrect crowd who don’t understand the ambiguity rules.

PEMDAS works just fine, just don’t forget ambiguity rules.

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PowerOfUnoriginality t1_iycvygv wrote

I think everyone agrees with this.

The PROBLEM is when we have something like 8 ÷ 2 (2 + 2), and whether the first 2 is part of the grouping with implied multiplication or not. Which is why, you would never get it written like that, but rather as a fraction that clearly shows where what belongs.

Fractions MVP

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Hardcore_Donut t1_iyd1arx wrote

Of course it's part of the multiplication. If it wasn't there would be another symbol there.

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Ok_Suggestion_2657 t1_iye7vbn wrote

Is it bad i only know bidmas - brackets indices division multiplication addition subtraction?

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HotpieTargaryen t1_iyd26zy wrote

Enough memes about elementary school math.

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People_are_stup1 t1_iydkohg wrote

Does anyone past secondary school actually need these? Like either you already know this by hart or you don't need it.

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