We study simple conversions between metric measuring units that are based on the conceptual understanding of decimals. For example, since we know that 0.001 (one-thousandth) of a meter is a millimeter, then 5 millimeters means 5 thousandths of a meter, and as a decimal is written 0.005 m.

Another example. The prefix "centi" basically means one hundredth. So, 6 centiliters literally means 6 hundredths of a liter, or 0.06 L.

So, this understanding of decimal place value gives us an easy means of converting quantities expressed in derived units back to the basic unit (such as meter, liter, or gram).

Check out also my other video on the metric system where I explain the system of prefixes in much more detail:

https://youtu.be/glVCPhfA0xI

Tagged under: metric units,metric system,measuring,5th grade,math,decimals,measurement units

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