Questions tagged [estimation]

For questions about estimation and how and when to estimate correctly

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Why, when rounding, do we round 5 up to 10?

If we cut 10 in half, then we get 5. This means two 5s makes 10, meaning, 6, 7, 8, 9, and 10, are the remaining 5 numbers that make it up. So why do we round up 6 numbers? It's such a small thing but it annoys me so much.
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