Rational numbers are numbers that can be expressed as fractions with non-zero denominators.

1. All of these numbers are rational numbers. Show that they are rational by writing them in the form or for integers and .
   1. 6.28
   4. -7.1234
2. All rational numbers have decimal representations, too. Find the decimal representation of each of these rational numbers.
3. What do you notice about the decimal representations of rational numbers?

Although is irrational, we can approximate its value by considering values near it.

1. How can we know that is between 1 and 2?
2. How can we know that is between 1.4 and 1.5?
3. Approximate the next decimal place for .
4. Use a similar process to approximate the to the thousandths place.