Post on 02-Jan-2016
Practice 1.2 Answers
1. 52 2. 2 3. 38 4. 16 5. 18.96. 87 7. 25 8. 7 9. 2 10. 111. 9 12. 5 13. 26 14. 29 15. 8816. 85 17. 12 18. 5 19. 26 20. 5521. 72 22. 60 23. 2 23. 13124. 33.95 25. 63.34 26. 2427. 2.25 28. 0 29. 99 30. 6
(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 #’sRational #’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) ⅝b) e) 0c) 42 f) 0.3
10
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}
16, 2 , 1.6 , 0.75, 2
3
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) 15 5 , if 3x x
48 5 , 12x if x
Order
9. Write in order from least to greatest.a) -7 , 4 , 0 , 12 , -12b) -¼ , -¾ , -½ , ⅝ ,-⅝
10. Compare the following
a b c. . . . 18 161
4
1
4
1
30 3333