G8

Copyright © Swun Math Grade 8 Unit 2 Lesson 7 P TE

Student Practice

Unit 2 · Lesson 7: Zero and Negative Exponents

Directions: Simplify the expression. Write the solution using a positive exponent.

1. 
   

47 ⋅ 4 −^2

48

Solution:

4 7+(−2)

48

45

48 = 4

5−8 (Students might want to write 5 – 8)

4 −3=

1

43

2. 
   

2푏푏^4

푏푏^5

Solution:

2 푏푏^4

푏푏^5

= 2푏푏4−5

2 푏푏−1 make the exponent positive so 푏푏−1=^1 푏푏

2

푏푏

3. 
   

1

푚푚^4

⋅

1

푚푚−4

Solution:

1

푚푚4+(−4)

1

푚푚^0

=

1

1

= 1

4. 6 −^5 ⋅ 6 −^5

Solution:

6 −10= 6110

5. 푝푝−^3 ⋅푝푝^3

Solution:

푝푝−3+3

푝푝^0 = 1

6. 
   

7 푛푛−^9

푛푛−5

Solution:

7 푛푛−9

푛푛−5

= 7푛푛−9−(−5)

7 푛푛−4 make exponent positive so 푛푛−4which is (^) 푛푛^14
7 푛푛−4=

7

푛푛^4

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