Exercise 3 Page 353

We want to round the given decimal number and write the result as the product of a single digit and a power of 10. 0.0000001801Let's start by rounding the given number to the nearest 0.000000 1. Since the digit in the hundred- millionths place is greater than 5, we will add 1 to the digit in the ten- millionths place. 0.000000 1 801 ≈ 0.000000 2 Finally, we will write the above number as the product of a single digit and a power of 10. To do so, let's first factor out 2.

0.0000002

FactorOut

Factor out 2

2* 0.0000001

WritePow

Write as a power

2* 10^(- 7)