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To round to a whole number you're going to round to the nearest number with no decimal. For a half number you will have a number that ends in .5 or with no decimal.

Examples;

56.893 rounded to the nearest whole number is 57

56.893 is closest to 56 and 57. It is .893 away from 56, but is only .107 away from 57 so, 57 is the nearest whole number.

56.893 rounded to the nearest half number is also 57

The two half numbers that are near 56.893 are 56.5 and 57, but 56.893 is .393 away from 56.5 and only .107 away from 57 so, 57 is the nearer whole number.

3.389 rounded to the nearest whole number is 3

3.389 rounded to the nearest half number is 3.5

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Q: How do you you round to the nearest half or whole number?
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Related questions

Why does it make sense to round a mixed number to the nearest whole number when estimating a sum or difference Could you round to the nearest one half instead?

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