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A comment on Ask HN: How to self-study mathematics from the undergrad through graduate level?. Parent comment

Re:Ask HN: How to self-study mathematics from the undergrad ... by momofarm on Friday January 18, 2019 @08:05PM (#18944583)
so, in real world application, what's the most useful/valuable topic in mathematics?

Although I wonder for 90% people of this world that math is just a tool to pass the exam at school, not any real application (or they just can't sense it).

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Re:Ask HN: How to self-study mathematics from the undergrad ... by umanwizard on Friday January 18, 2019 @08:24PM (#18944658)
> in real world application, what's the most useful/valuable topic in mathematics?

Basic arithmetic: addition, subtraction, multiplication, division.

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Re:Ask HN: How to self-study mathematics from the undergrad ... by derangedHorse on Saturday January 19, 2019 @12:29AM (#18945507)
It depends on what your relative judgements are for what is deemed 'valuable' or 'useful'. Are the number theory foundations that allow digital transactions to occur more valuable than the subtraction done to figure out how many minutes until the next hour?
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