Answer:
1. This page explains the two most common systems of measurement: the metric system, used widely in Europe and most of the rest of the world, and the Imperial or British system, a form of which is now chiefly used in the USA
2. Most countries use the Metric System, which uses the measuring units such as meters and grams and adds prefixes like kilo, milli and centi to count orders of magnitude. ... The English system is based on yards/feet/inches whereas the metric system includes the meter/centimeter/millimeter.
3. addition, subtraction, multiplication, and division (MDAS)
4. To convert inches to centimetres, multiply the given inch value by 2.54 centimetres.
5. 1cm = 0.3937007874 inches.
As there are 2.54cm in an inch, to convert your cm figure to inches you need to divide your figure by 2.54.
