# Lesson 1

Exponent Review

### Lesson Narrative

In grade 6, students worked with whole number exponents. This lesson reviews those concepts and subtly introduces the idea that repeated division by a number can be thought of as repeated multiplication by the reciprocal of that number, which plays a key role in later work on negative exponents.

### Learning Goals

Teacher Facing

• Comprehend that repeated division by 2 is equivalent to repeated multiplication by one-half.
• Create an expression that represents repeated multiplication, and explain (orally) how the structure of the expression helps compare quantities.

### Student Facing

Let’s review exponents.

### Student Facing

• I can use exponents to describe repeated multiplication.
• I understand the meaning of a term with an exponent.

Building On

Building Towards

### Glossary Entries

• exponent

In expressions like $$5^3$$ and $$8^2$$, the 3 and the 2 are called exponents. They tell you how many factors to multiply. For example, $$5^3$$ = $$5 \boldcdot 5 \boldcdot 5$$, and $$8^2 = 8 \boldcdot 8$$.

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