# Lesson 13

Expressions with Exponents

### Lesson Narrative

In this lesson, students analyze the structure of expressions (MP7) to apply their understanding of exponents. While they practice using the notation of expressions with exponents, students recall and apply their prior understanding of operations and connect those understandings to the meaning of exponents. They write, interpret, and evaluate expressions with exponent notation where the exponents are whole numbers and the bases may be whole numbers, fractions, or decimals. Students also apply their new understanding from earlier in the unit about determining whether equations are true or false.

### Learning Goals

Teacher Facing

• Critique (orally and in writing) arguments that claim two different numerical expressions are equal.
• Justify (orally and in writing) whether numerical expressions involving whole-number exponents are equal.

### Student Facing

Let's use the meaning of exponents to decide if equations are true.

### Student Facing

• I can decide if expressions with exponents are equal by evaluating the expressions or by understanding what exponents mean.