this post was submitted on 18 Oct 2024
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Mental arithmetic is all little tricks and shortcuts. If the answer is right then there's no wrong way to do it, and maths is one of the few places where answers are right or wrong with no damn maybes!
Unless you consider probabilities. That's a very strange field—you can't objectively verify it.
You can't objectively verify anything in mathematics. It's a formal system.
Once you start talking about objective verification, you're talking about science not math.
It is actually the opposite, since it is purely abstract everything in math is objective. There is literally no subjectivity possible in something that isn't in the real world.