The mathematical purpose of this lesson is for students to review the properties and , and the convention for evaluating a number to the power of 0. The work of this lesson connects to previous work done in grade 8 in which students learned the exponent rules and practiced applying them when creating equivalent expressions. This lesson prepares students to use exponents to rewrite expressions in the associated Algebra 1 lesson.
When students perform a number of numerical calculations and then express the outcome of and using a single exponent, they are expressing regularity in repeated reasoning (MP8). In the row game, when students get different answers for the same row, they have an opportunity to justify their thinking and critique the reasoning of others (MP3).
Learning Goals
Generalize (orally and in writing) patterns in the expanded forms of exponential expressions in order to justify the rules for multiplying and dividing with exponents.
Use the rules for multiplication and division of exponents to evaluate exponential expressions.
