Apart from a couple of less advanced countries and (including?!) the US, all countries use the metric system. Since it is based on multiples of tens, calculations are simpler. Also, there are simpler links between measures for different attributes, for example between mass and volume.
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1) It is an international standard, so all scientists use the same measurements. For comparison, for example, different countries have different definitions of a pound. 2) Calculations are easier, because of the decimal prefixes.
You have your choice. If you like the metric system, measure your ping pong table in meters. If you prefer the English system, measure your ping pong table in feet.
Mainly to use an accepted standard (scientists all over the world use the same units). Also, it is easier to do calculations in metric units.
Because exponential or scientific notation needs less digits for very large numbers and metric units are preferred because they are in multiples of 10 thus avoiding mistaken calculations.
I do because I prefer metric units. The majority of the world uses metric units but you don't have to! Just don't try trading with most people.I do because I prefer metric units. The majority of the world uses metric units but you don't have to! Just don't try trading with most people.I do because I prefer metric units. The majority of the world uses metric units but you don't have to! Just don't try trading with most people.I do because I prefer metric units. The majority of the world uses metric units but you don't have to! Just don't try trading with most people.