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並前往https://math.stackexchange.com/questions/2753748/why-is-0-5-rounded-up-to-1-0-its-not-closer-to-1-than-0

Why is 0.5 rounded up to 1.0? It's not closer to 1 than 0 ...

It is by convention that we define rounding as. round(x)=⌊x+0.5⌋=−⌈−x−0.5⌉. The wikipedia page on rounding explains how the process ...

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