Exponents are described as representing repeated multiplication. The zero exponent is explained by observing a pattern that occurs when descending exponent values are applied to a common base.
Introduction To Exponents
Math Antics Intro To Exponents aka Indices
Introduction To Exponents
What Is An Exponent An Intro To Exponents Math With Mr J
Algebra Basics Laws Of Exponents Math Antics
Introduction To Exponents Pre algebra Khan Academy