Zero and negative exponents (8th grade/algebra)
We start out with some patterns to learn what would be the logical value for a number to the zeroth power, and also for negative exponents. The pattern confirms the common definition: any number to the zero exponent is one, and a negative exponent is handled as a reciprocal of the same power but with a positive exponent.
Then we also simplify some expressions involving negative exponents.
See also
Online practice for evaluating powers — including with negative and zero exponents
Laws of exponents, part 1 — video lesson
Math Mammoth Grade 8 curriculum