1. When the angle unit "0" can be used in mathematics, one ""is used to represent the minute and two ""are used to represent the second. 1 hour is one of the scales of 12, 12 hour is 360, so 1 hour is 12.
2. In mathematics, the English abbreviation hour can also be expressed by "h", with "m" for minutes and "s" for seconds, so when 1, 12 minutes and 38 seconds, mathematics can be written as "112m38s";
3. In mathematics, hours, minutes and seconds can also be separated by colons, so 1 2 minutes and 38 seconds at1can also be written as "1:12: 38".