# Warm-up #8 Ch 2 Write in order least Warm-up #8 Ch 2 Write in order least to greatest 1) 4, -6, 31, 0, -9 2) 14, 0, -4, -1, 3 Replace each with =, <, or > -5 -1

4) 0 -7 3) 5.) Evaluate 12 - -3 Answers to WU #8 1. -9,-6, 0,4,31 2. -4,-1,0,3,14 3. < 4. >

5. 9 2.2 Rational Numbers Objectives: 1. To show that a number is a rational # 2. To graph rational #s 3. To compare rational #s using < or >

Classes of Numbers Rational Numbers Comes from the word ratio Any number that can be expressed as the ratio of two integers 3 6 3 or etc 1 2

92 9.2 10 Write the following number as a ratio of two integers: 7 7 14

or etc 1 2 Write the following number as a ratio of two integers: 0.7 7 10

Any terminating or repeating decimal can be written as a fraction It there is 1 decimal place drop the decimal and put the number over 10 2 decimal places drop the decimal and put over 100 3 decimal places drop the decimal and put over 1000

****Remember to REDUCE******* Write the following number as a ratio of two integers: 4.5 45 9 or 10 2

Write the following number as a ratio of two integers: -9.2 92 10 Negative Rational Numbers

Negative threefourths 3 4 3 4 3

4 Graphing Fractions on the # line Turn improper fractions to mix numbers Find the 2 whole numbers the fraction is in between and put a dot between those two whole numbers Graph on the Number Line

5 2 -6 -4 -2 0

2 4 6 Graph on the Number Line 4. 5 -6

-4 -2 0 2 4

6 Comparing Decimals Compare each place value Comparing Rational Numbers Using < and > 1.38

< 1.83 Comparing Rational Numbers Using < and > 0.545 > 0.543

Comparing Rational Numbers Using < and > 3 5 4 8 Cross multiply and compare their products

Assignment: Page 61 (2-38) even -6 -4 -2

0 2 4 6