this post was submitted on 18 Oct 2024
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Hungry 9 (lemmy.likes.cat)
submitted 7 months ago by sag@lemm.ee to c/curatedtumblr@sh.itjust.works
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[–] stankmut@lemmy.world 11 points 7 months ago

The difference would just be how you think of the process. I sometimes shuffle around the numbers to make math easier, but the shortcut for adding 9s just feels different. Instead of 9+7 = 10 + 6, it's more like 9+7 = 17-1. It feels less like solving it with math and more like using a cool trick, since you didn't really use addition to solve the addition problem.