Question

How do you remember the metric system?

Answer 1

Metric system is in decimals (base `10`) notation and hence very easy to calculate. Further, it uses standard names for different powers of `10` and hence easy to remember.

Explanation:

Metric system is easiest to remember. At the central level we have units like

gram for weight
meter for length
*liter for volume

And then ten times are decagram, decameter, decaliter
hundred times is hectogram, hectometer, hectoliter
thousand times is kilogram, kilometer, kiloliter

one-tenth is decigram, decimeter, deciliter
one-hundredth is centigram, centimeter, centiliter
one-thousandth is milligram, millimeter, mililiter

Apart from this, mega is one million times `10^6`
Giga is one billion times `10^9`
Micro is one-millionth `10^-6`
Nano is one-billionth `10^-9`
Pico is `10^-12`
Femto is `10^-15`