Lesson 13: Expression with Exponents

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

Today’s Goals

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

Which One Doesn’t Belong: Twos

Warm Up

Which one doesn’t belong?

Is the Equation True?

Activity 1
● MLR8: Discussion Supports

Let’s Talk About It

●Can you switch the order with exponents like we can with addition and
multiplication—specifically, are ab and ba equivalent? How do you know?

●What change can we make to the equation 3+3+3+3+3=35 to make it true?

●Your friend claims the equation ½ ᐧ ½ ᐧ ½ ᐧ ½ = 4 ᐧ ½ is true. What do you think they are
misunderstanding? How can you convince them it is false?

●Can you show that 82 = 43 is true without evaluating both sides? What understanding about
the meaning of exponents and operations can help you?

What’s Your Reason?

Activity 2
● MLR8: Discussion Supports

Work with your partner (10 min)

Lesson Synthesis

Lesson Synthesis

Coin Calculation

Cool Down