G8

Copyright © Swun MathCopyright © Swun Math Grade 8 Unit 3 Lesson 6 P TE

Answer Key

Extension Activity

Answers will vary. Sample responses:

1.3 × 10 ³ × 4 × 10 ³ = 5.2 × 10 ³

2.6 × 10 ³ × 3 × 10 ³ = 7.8 × 10 ³

3.4 × 10 ³ × 2 × 10 ³ = 6.8 × 10 ³

Homework

1. (1.2 × 1.3) × (10^3 × 10-1)
   1.56 × 103 + (-1)^
   1.56 × 10^2

2. 1.^25 ⋅^10

2

5⋅ 10−1=^

1. 25
   5

⋅

102

10 −1

0. 25⋅

102

10 −1

0.25 × 102 – (-1)^

0.25 × 10^3

2.5 × 10^2

3. (2.4 × 3.1) × (10^4 × 10^1 )

7.44 × 104 + 1^

7.44 × 10^5

4. 6.^4 ⋅^10

3

4⋅ 10^4 =^

6.4

4

⋅

103

104

1.6⋅

103

104

1.6 × 103–4

1.6 × 10-1

5.

6 ⋅ 10 −1

1.5⋅ 10 −2

=

6

1.5

⋅

10 −1

10 −2

4 ⋅

10 −1

10 −2^

4 × 10-1– (-2)^

4 × 10^1

6. (1.3 × 6.2) × (10-5 × 10-2)

8.06 × 10-5 + -2

8.06 × 10-7