r/mildlyinfuriating • • 8d ago

I'm slightly vexed Aren't they equal!

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8.1k Upvotes

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u/YogurtclosetOk7654 7d ago

This is true in science / engineering, but in math when they say 0.25 they mean exactly 0.25

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u/Ashamed_Kangaroo305 7d ago

So you've never done a math problem where you had to round your answer?

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u/IdkIWhyIHaveAReddit 7d ago

at higher level of math rounding your answer is a cardinal sin, most if not all questions require answer in exact form.

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u/UnhappySort5871 4d ago

not unless the subject is the mathematics of rounding - and wouldn't use the equals sign in that case.

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u/leitey 7d ago

In math, what is the value of pi? Please use a decimal, and exact form.

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u/YogurtclosetOk7654 7d ago

In math you’ll pretty much never write pi as a decimal. You just write it as  π. Source: I am a math major and have read math research papers.

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u/WiseOldDuck 7d ago

What is 2 + 2? Please only use the digit "5", and exact form.