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# Lesson 5-2 Pages 205-209 Rational Numbers Lesson Check 5-1.

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Lesson 5-2 Pages 205-209 Rational Numbers Lesson Check 5-1

What you will learn! 1. How to write rational numbers as fractions. 2. How to identify and classify rational numbers.

Rational number

What you really need to know! A number that can be written as a fraction is a rational number. Mixed numbers, integers, and many decimals can be written as fractions.

What you really need to know! Other decimals such a  = 3.14592654… are infinite and nonrepeating. They are called irrational numbers.

Rational Numbers 1.8 0.7 -3.222… Integers -5 -12 What you really need to know! Whole Numbers 6 15 0 1 2 3 Natural Numbers

Whole Numbers Integers Rational Numbers 5 5555 00 0 0 -7 4.5 3/4

Example 1: -(8 4 + 3)

Example 2:

Example 3: Write each decimal as a fraction or mixed number in simplest form. 0.26

Example 4: Write each decimal as a fraction or mixed number in simplest form. 2.875

Example 5: Write 0.39 as a fraction in simplest from. n = 0.39393939… 100n = 39.393939…

Example 5: - n = 0.393939… 100n = 39.393939… 99n = 39 99

Example 6: Identify all sets to which each number belongs. a. 15 Natural, Whole, integer, and rational Rational number

Example 6: Identify all sets to which each number belongs. c. 0.3030303030… Rational number

Page 207 Guided Practice #’s 3-11

Pages 205-207 with someone at home and study examples! Read:

Homework: Pages 208-209 #’s 12-48 even #’s 52-75 Lesson Check 5-2

Page 733 Lesson 5-2

Lesson Check 5-2

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