This tutorial: Part A: Integer Exponents

If a is a real number and n is a positive integer, then by a^{n} we mean the quantity
The number a is called the base and the number n is called the exponent.
Thus, a^{1} = a, a^{2} = a^{.}a, a^{5} = a^{.}a^{.}a^{.}a^{.}a
Here are some examples with actual numbers:
The following rules show how to combine such expressions.

Caution

Fill in the missing exponents and other numbers and press "Check.". (Raised boxes are exponents.)
Here are some for you to try.
We can use the exponent identities to convert between the two forms just described: 
You should go over Part B in the next tutorial before trying the examples and exercises in Section 0.2 of the Algebra Review of Applied Calculus and Finite Mathematics and Applied Calculus