Hi, this is a great forum which I've just joined, I'd suggest that we can benefit from some video tutorials posted on Youtube and then embedded here, this way people can find maths easier to understand..
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Occasionally people do post videos on all types of subjects.
In mathematics, you don't understand things. You just get used to them.
I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.