Practice 1.2 Answers

(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

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

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

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)

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.

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}

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| =

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

Ex. 8 a) b)

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