Final answer:
In mathematics, measurement often has a unique characteristic that is being measured or compared with the base. Base units are standards for expressing measurements of base quantities. Derived units are units that can be calculated from algebraic combinations of fundamental units.
Step-by-step explanation:
In mathematics, measurement often has a unique characteristic that is being measured or compared with the base. A base unit is a standard for expressing the measurement of a base quantity within a particular system of units. Derived units, on the other hand, are units that can be calculated using algebraic combinations of the fundamental units.