551
I'm right, ain't I? (lemmy.dbzer0.com)
submitted 1 year ago by to c/adhd@lemmy.dbzer0.com
128 comments fedilink hide all child comments
 
you are viewing a single comment's thread
view the rest of the comments
[–] 69 points 1 year ago (16 children)

Borrow 1 from the 7 leaving you 10 and 6. This is what they tried to teach in schools for awhile but adults weren't getting it. Common Core? Is that what they called it?

  • permalink
  • fedilink
  • source
  • hideshow 16 child comments
    •
  • [–] 49 points 1 year ago (8 children)

    As someone who learned not via Common Core, and then found out Common Core taught math how I taught myself to do mental math I was a little envious that kids would learn my “easier” method.

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 8 child comments
    •
  • [–] 23 points 1 year ago (7 children)

    Same, common core is what I came up with to do mental math.

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 7 child comments
    •
  • [–] 14 points 1 year ago (6 children)

    Yup, helping my kiddo with the math portion of Common Core was like seeing professionals finally understanding how easy it is to sort numbers to make stuff easier instead of doing a bunch of rote memorization of tables. Also teaching kids to estimate to know if your math is way off!

    Common Core for math was awesome. That was the only one I had to help with so no idea about the rest.

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 6 child comments
    •
  • [–] -1 points 1 year ago (5 children)

    Well it's good for some shorthand but anything complicated you need either a calculator or do it long hand. With calculators everywhere they may have just switched to "hey fun mental ways to think about it because no one does long hand anyway".

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 5 child comments
    •
  • [–] 4 points 1 year ago (4 children)

    No, the same fundamental concepts works extremely well for multiplication of large numbers and long division, both of which don't have a memorization option. It also helps with catching typos when using a calculator.

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 4 child comments
    •
  • [–] 1 point 1 year ago (3 children)

    Easy long numbers yes, complicated long numbers I'm gonna say no. I'm not even saying large numbers, I'm saying long numbers which can include decimal points. And the chance of mistakes goes way up. There's no point of doing it mentally or by hand when calculators are ubiquitous. I think this is why they switched to different ways of thinking about math, rather than hard core hand calculations that no one is going to do anyway.

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 3 child comments
    •
  • [–] 3 points 1 year ago (2 children)

    Decimal points don't make it more complicated when you understand the fundamentals.

    Using a calculator is not a different way of thinking. You have to understand the math to know whether the calculator is being used correctly, the calculator just makes it faster.

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 2 child comments
    •
  • [–] -1 points 1 year ago* (1 child)

    Sigh. Decimals contribute to length. Length.

    Sigh. I didn't say calculators are a different way of thinking. I said common core is a different way of thinking, compared to long hand calculations.

    You're missing everything I say and it's like trying to communicate to a brick wall. Ciao.

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 1 child comment
    •
  • [–] 2 points 1 year ago*

    Sigh. Decimals contribute to length. Length.

    Yeah, I'm probably missing what you are saying because I'm replying to what you are writing and the more you explain it the less sense it makes. Like there is nothing that I can think of involving decimals that increases in length. Maybe number of steps, but that is also true the more digits are involved and decimals only add one extra step.

  • permalink
  • fedilink
  • source
  • parent
  • [–] 5 points 1 year ago*

    One of my wifes friends was an elemetry school teacher when common core was popular. We asked her what it was and as she was explaining it, i said, "oh, like how you do mental math?"

    Im an engineer and i just assumed thats how everyone did math... apparently people just memorized everything

  • permalink
  • fedilink
  • source
  • parent
  • [–] 4 points 1 year ago* (last edited 1 year ago) (5 children)

    Yeah, when I went through school they didn’t teach it this why but that is what I taught myself, much more simple math (+ & - with no * or \) in the same amount of steps.

    Is that what they call Common Core? I’ve heard the term but didn’t know how it changed the method of teaching math.

    Leave it to my AuDHD brain to figure out a less strenuous path to the same endpoint…

    I wonder if this is an anxiety source for ASD/ADHD/AuDHD people. Having to constantly re-map lessons taught to fit my neurodivergent brain that it now feels like the entire neurotypical world is gaslighting neurodivergents.

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 5 child comments
    •
  • [–] 4 points 1 year ago (3 children)

    Just a heads up, your \ got absorbed by the text markdown Lemmy uses. You have to use a double slash to have it show up, like this \\.

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 3 child comments
    •
  • [–] 3 points 1 year ago

    Is that what they call Common Core? I’ve heard the term but didn’t know how it changed the method of teaching math.

    Common core showed multiple ways that were intended to increase the understanding of how math works. This was one of the ways that was presented which wasn't how they taught it when I was a kid. There were at least two that I remember when my kiddo was doing common core:

    • Double one of the numbers and add or subtract the difference between them (7 is two less than 9, so 9x9 then subtract 2)
    • Take enough from the smaller number to reach 10 and add what is left (9+7 to 10+6)
  • permalink
  • fedilink
  • source
  • parent