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Find the two numbers on either side of the given number and then work out the difference between the given number and the two "half" numbers. The smaller difference is the one which refers to the nearest half.

For example:

Suppose you are given 3.78

The numbers, in halves are ... , 3.0, 3.5, 4.0, 4.5, ...

Of these 3.5 and 4.0 are the ones which would be next to 3.78

Then 3.78 - 3.5 = 0.28

and 4.0 - 3.78 = 0.22

Since the second number is smaller, the nearest half is 4.0


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βˆ™ 8y ago
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βˆ™ 8y ago

Anything between .75 and .24 rounds to zero, anything between .25 and .74 rounds to .5

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Q: How do you round numbers to the nearest half?
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