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Maths (media.piefed.world)
submitted 1 year ago by to c/memes@lemmy.world
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[–] 5 points 1 year ago (4 children)

Can we say "commutative" in this case ?

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  • [–] 7 points 1 year ago (3 children)

    Yeah stuff like that really ain't it. It works in a few use cases, but is objectively wrong and detracts from understanding the topic properly. That's why I teach percentages as the fractions they are. By the time you learn percentages, you already know multiplying fractions is commutative, so the trick still works, and you also understand why.

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  • [–] 1 point 1 year ago

    Yeah stuff like that really ain’t it

    Yes it is

    It works in a few use cases,

    It works in every case where you have multiplying and dividing, including fractions and percentages

    but is objectively wrong

    No it isn't

    detracts from understanding the topic properly

    Enhances it actually

    That’s why I teach percentages as the fractions they are.

    Sounds like you're only teaching as much as you understand. Try understanding more. Students love the tricks that make Maths easier, including this one.

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