Easy Learning English

Punctuation in numbers - Easy Learning Grammar

Dates

Full stops or slashes are often used in dates.
 American usage
 
12.3.093/12/09
2.28.152/28/15

Scientific usage

Full stops are not used in scientific abbreviations.
12 kg50 cm

Times

Full stops and occasionally colons are used in times.
4.15 p.m.21.15
3:30 a.m.20:30

Long numbers

Commas are used in numbers to mark off units of thousands and millions.
1,3592,543,678

Decimals

Full stops indicate decimal points.
1.525.08

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