12
10 + 10 + 10 + 10 + 10 + 10 + 10 + 108 = 178
The prefix micro-, as in micrometre, or microsecond, refers to 10-6, or one millionth, of the whole.
One method is (10×4)+(5×3) = 55 (or mentally add up from left to right).
It is kilo-
There is no prefix for "10-3".
The Metric system is based on 10.
12
It indicates 10-12 of a unit.
There is no special prefix for that factor. There are SI prefixes for powers of 10 (10, 100, 1000, 0.1, 0.01, 0.001), and especially for powers of 1000 (1000, a million, a billion, 1/1000, etc.)
Adding a prefix changes the magnitude of the base unit. The prefix indicates a multiple of 10 by which the base unit is multiplied. Common prefixes include milli- (0.001), kilo- (1000), and mega- (1,000,000).
dekameter abbreviated dam
A 1 unit change in pH corresponds to a 10-fold change in the concentration of hydrogen ions (H+). For example, a solution with a pH of 5 has 10 times more H+ ions than a solution with a pH of 6.
kilo
The SI unit prefix that means one hundred is "hecto-" symbolized as "h". It denotes a factor of 10^2 or 100.
The unit "deca" is used as a prefix in the metric system to represent 10 times a base unit. For example, 1 decameter is equal to 10 meters, and 1 decagram is equal to 10 grams.
1.35 meters. 100 cm = 1 m. 135/100 = 1.35. This displays the inherent usefulness of the metric system as all units and subunits are simply related by powers of 10 and can be readily identified by their prefix. Milli = 1/1000 of a unit Centi = 1/100 of a unit Deci = 1/10 of a unit No prefix = that unit Deca = 10 * that unit Hecto = 100 * that unit Kilo = 1000 times that unit And so on.