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​Lower and upper bounds

Lower and upper bounds describe all the possible values that an approximated number or measurement could have been before it was rounded.

Example: A person's height is 1.75 m approximated to the nearest 0.01 m (or 2 decimal places) so their height could have been anywhere within the range 1.745 m ≤ height < 1.755 m before it was rounded.

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