hi this is mrs israel with another pre algebra tutorial today's topic monomials a monomial is a mathematical expression that is made up of only one term it cannot contain any addition or subtraction science or negative exponents let's look at a few examples a the second power is this a monomial? yes it is because it does not have any negative exponents or additional subtraction terms but the second example b the third plus c is that a monomial? no it's not because it has an addition sign in it