G8

Copyright © Swun MathCopyright © Swun Math (^) Grade 8 Unit 3 Lesson 2 P TE

Answer Key

Extension Activity

Answers may vary. Sample response: The number of grains of sand, astronomers measure distances in space,

doctors measure size of blood cells, etc...

The pattern is that smaller items are negative powers of ten, and larger numbers are positive powers of ten.

Homework

1. 0.089
   8.9
   8.9 × 10-2

2. 5, 000 ,000

5.0

5 × 10^6

3. 1 × 10-^7

0.0000001

4. 2.3 × 10-^5

0.000023

5. 7.098 × 10^5

709,800

6. 405,698

4.05698

4.05698 × 10^5