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I'm right, ain't I? (lemmy.dbzer0.com)
submitted 1 year ago by to c/adhd@lemmy.dbzer0.com
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[–] 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.

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

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

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  • [–] 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.

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  • [–] -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".

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  • [–] 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.

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  • [–] 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.

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  • [–] 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.

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  • [–] -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.

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  • [–] 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.

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