The problem with that was all curriculum and Excuse Me Im Speaking With Chucks And Converse For Kamala Harris 2021 shirt. The actual concepts of teaching other ways to represent numbers and using things like adding 4 and 7 together by taking 3 from the 4 to make the 7 a 10 aren’t actually bad, that’s the way lots of people do mental math anyway, and it makes math more than just symbol manipulation. The problem was forcing people to do it that way to the exclusion of the old way is that it confused parents, and textbooks were so bad at first that it poisoned the well.
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Oh gawd that reminds me of Excuse Me Im Speaking With Chucks And Converse For Kamala Harris 2021 shirt. The way my parents was taught for like long division was different than the way i was being taught (i think the main difference was that it let us show our work). At one point I switched schools and was back to doing long division with a teachers aid so I ended up relearning it the old way because showing my work wasnt necessary. Now I never use either, but I’d probably have to work it out from scratch because the formula has fallen out of my head and the only thing left is the “common core” ways of doing simple math.