1. Practice 1.2 Answers 1. 522. 23. 384. 16 5. 18.9 6. 877. 258. 79. 210. 1 11. 912. 513. 2614. 2915. 88 16. 8517. 1218. 519. 2620. 55 21. 7222. 6023. 223. 131 24. 33.9525. 63.3426. 24 27. 2.2528. 029. 9930. 6

2. (A.4) Section 1.3 Rational Numbers & the Number Line Objectives Identify coordinates on a Number Line Graph numbers on a number line. Find absolute values of rational numbers. Evaluate Expressions with Absolute Value

3. Real Number System ( ) Rational Numbers ( Q ) Irrational Numbers ( I ) Integers ( ) Whole Numbers ( W ) Natural Numbers ( )

4. Real Numbers Irrational #’s Rational #’s Integers Whole #’s Natural #’s

5. Rational Number Practice 1. Name the set(s) of numbers to which each given number belongs. a) -13 d) ⅝ b) e) 0 c) 42 f)

6. Determine whether each statement is true or false, if false give a counterexample. 2. No fractions are whole numbers. 3. All whole numbers are real numbers.

7. Ex.4 Graph Ex. 5 Graph {integers less than -3 or greater than or equal to 5} Ex. 6 Graph {integers greater than -3 and less than or equal to 5}

8. Absolute Value The absolute value of any number x is is the distance the number is from 0. Symbol for Absolute Value is |Bars|. For simplifying treat Absolute Value Bars like parenthesis. Do what is inside first. Examples |-4| = or |4| =

9. Ex. 7 a) 15 – |8 + 4| b) |–10| – 6 + 4

10. Ex. 8 a) b)

11. Order 9. Write in order from least to greatest. a) -7, 4, 0, 12, -12 b) -¼, -¾, -½, ⅝,-⅝ 10. Compare the following