Min is a unit of time, which refers to minutes. Minutes, also called minutes, are units of time. Minute is English, which means "tiny" and also means min. Engraving = 15 minutes, word = 5 minutes (usage in southern Fujian and Guangdong).

The symbol of hour is h (hour), and hour is the unit of time. The hour is not the basic unit of the international system of time units, but an auxiliary unit of time coordinated with the basic unit of the international system of units. Except in leap second, one hour is generally equal to 3600 seconds, or 60 minutes, or 1/24 days, which is often expressed by "h" in English or mathematics.

The symbol of second is s (second), which is the basic unit of time in the international system of units. The symbol is s, and sometimes it is marked as sec by English abbreviation. Time and minutes are usually separated by ":",minutes and seconds.

Description of conversion of minutes and hours:

1, the units of minutes and hours are different. Minutes are units of time, while hours are units of time. Therefore, in the process of conversion, it is necessary to explicitly convert the time unit into another time unit.

2. When converting minutes and hours, you need to use the same unit of measurement. For example, if you want to convert minutes into hours, you need to use the same decimal system between minutes and hours.

3. When converting minutes and hours, you need to pay attention to the range and precision of numerical values. Because the numerical range of minutes and hours is different, it is necessary to consider the numerical range and accuracy when converting.

4. Pay attention to the position of decimal point when converting minutes and hours. Because of the different numerical ranges of minutes and hours, it is necessary to pay attention to the position of decimal point in conversion to avoid precision error.