This document provides an overview of rational numbers and their properties. It defines rational numbers as any numbers that can be written as a ratio, and discusses fractions, reciprocals, ordering rational numbers, and calculator tips for adding and subtracting mixed numbers. The key topics covered are rational and irrational numbers, writing fractions, finding the reciprocal of a number, ordering rational numbers by finding their decimal equivalents, and using parentheses on a calculator for mixed numbers.

1. Rational Numbers +, -, x, /

2. Vocabulary to Define Real Numbers Rational Numbers Irrational Numbers Reciprocal 06/04/09 PH 01-06 Bitsy Griffin

3. Rational Numbers Any number that can be written as a ratio Examples: 5/9 -2 .75 - 06/04/09 PH 01-06 Bitsy Griffin

4. Writing Fractions 0/# is ok #/0 NOT ok Undefined 06/04/09 PH 01-06 Bitsy Griffin

5. Reciprocal Multiplicative inverse Flip Product of reciprocals is 1 What’s the reciprocal of? 06/04/09 PH 01-06 Bitsy Griffin

6. Ordering Rational Numbers Find decimal equivalents Put the original #s in order 06/04/09 PH 01-06 Bitsy Griffin

7. Calc Tips -> + Mixed #s When you have a fraction that looks like this: Use the parentheses on your calculator like this: 06/04/09 PH 01-06 Bitsy Griffin

8. Calc Tips -> - Mixed #s When you have a fraction that looks like this: Use the parentheses on your calculator like this: 06/04/09 PH 01-06 Bitsy Griffin

9. Review What is a fraction No No? What is the product of reciprocals? How can you order fractions easily? What calculator tip do you need to follow for mixed numbers? 06/04/09 PH 01-06 Bitsy Griffin