There are different categories of numbers that we use every day.
Integers that written in decimal notation have 1, 2 or 5 as the leading figure, followed by none, one or more zeros. These are very common numbers, e.g. used in Bank notes: 1, 2, 5, 10, 50, 200, 1000, ....
Other intergers, which are less common, e.g. your (approximated) height in cm, the (approximate) temperature of your body or the environment, or the (approximate) result of converting 200 miles to kilometers.
Numbers that are not integers, such as \$1.23.
If you have \$198 (category 2) bill in a restaurant, you'd probably tip \$2 to round it to \$200 (category 1).
Is there a term for numbers of category 1?