• 0 Posts
  • 28 Comments
Joined 8 months ago
cake
Cake day: September 15th, 2025

help-circle
  • neatchee@piefed.socialtoLemmy Shitpost@lemmy.worldSBA #119 maths
    link
    fedilink
    English
    arrow-up
    3
    ·
    edit-2
    5 days ago

    Addition asks “What do you get when you combine these two numbers?”

    Subtraction asks “What do you need to combine with this number to get this result?”

    Multiplication asks “What do you get if you add this number to itself this many times?”

    Division asks “How many times do you need to add this number to itself to get this result?”

    In many ways, all of these operations are syntactic flavor for addition. Subtraction is addition in reverse. Multiplication is repetitive addition. Division is repetitive addition in reverse. Exponents are recursive repetition of repetitive addition. And so on.

    Look into the axiomatic proof of 1+1=2. It will shed some light on how mathematics is just complex notation for very, very simple concepts at scale.


  • This is the correct answer and it drives me crazy how often this comes up.

    As another user commented, division and subtraction are just syntactic flavor for multiplication and addition, respectively. Division is a specific type of multiplication. Subtraction is a specific type of addition.

    And so there is a reason mathematicians do not use the division symbol (➗): it is ambiguous as to which of the following terms are in the divisor and which are part of the next non-divisor term.

    In other words, the equation as written is a lossy representation of whatever actual equation is being described.

    tl;dr: the equation as written provides insufficient information to determine the correct order of operations. It is ambiguous notation and should not be used.




  • Marriage is a state-sanctioned merger of assets and rights. It provides a legal authorization for decision making related to your spouse, shared property ownership rights, rights regarding power of attorney in an emergency, and tax benefits.

    Everything else is religious/social ceremony and can be achieved without the need for marriage certification.

    I know several people who didn’t “believe in marriage” until their SO was in the hospital and they weren’t allowed to visit or make decisions for them. Pretty horrible watching the estranged parent or second cousin making decisions about the health of your 10+ year partner, against your wishes, with no recourse.






  • I’ll give you the benefit of the doubt and assume you didn’t realize I’m a different person.

    The two thoughts I hold are “on election day, it’s self-gratifying not to vote for the outcome with the highest lows, raising the floor” and “before and after election day, do whatever you can to make the lives of politicians who fail miserable and support better candidates, up to and including civil unrest”

    Not voting is categorically ineffective. There may be plenty of things more effective than voting, but not voting isn’t one of them.

    People love to present this scenario like it’s a lever with three positions: candidate A, candidate B, or civil unrest. But it’s not. It’s one switch with two buttons (candidate a, candidate b) and another separate button for civil unrest. You can do both