• @KevonLooney@lemm.ee
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    -127 months ago

    This has a secondary effect of making average people incapable of estimation in their heads. Hopefully in the future people won’t be incapable of writing and art.

      • @KevonLooney@lemm.ee
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        -87 months ago

        But they were estimating things. Somehow illiterate people ran marketplaces for thousands of years.

    • @frezik@midwest.social
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      147 months ago

      The entire point behind the much maligned New Math is to teach approximate solutions that you can do quickly in your head. It’s the realization that if you want an exact answer, use a calculator, but quick head estimates are still useful.

      It was opposed by generations who were told to memorize multiplication tables because they wouldn’t always have a calculator available.

      • @KevonLooney@lemm.ee
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        -97 months ago

        Well you should memorize those anyway. It’s useful all your life for easy calculation. If you want 7 items and they cost $3.50 each, it’s between $21 and $28.

          • @exocrinous@startrek.website
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            7 months ago

            I calculated it in my head without memorising all the multiplication tables. I just realised that 7*3.5 is equal to (7*5+7*2)/2. And that 49/2 is equal to 40/2+9/2. Easy peasy. This is why I failed second grade math, because multiplication tables are only useful for doing operations a few seconds faster.

            • Hotdog Salesman
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              17 months ago

              There’s a much easier way.

              7x3.5 is the same as 7x3 plus half of 7. That’s 21 plus 3.5 is 24.5

              The funny thing is you did this for the division when you could do it for the entire thing.