lesson 9-2 pages 441-445 the real number system lesson check 9-1
TRANSCRIPT
Lesson 9-2 Pages 441-445
The Real Number System
Lesson Check 9-1
What you will learn!1. How to identify and compare numbers in the real number system.
2. How to solve equations by finding square roots.
Irrational numbersIrrational numbers
Real numbersReal numbers
What you really need to know!
The set of real numbers consists of all natural numbers, whole numbers, integers, rational numbers, and irrational numbers. (Lesson 5-2)
Rational numbers can be written as fractions.
Irrational numbers are decimals that do not repeat or terminate.
What you really need to know!
Rational Numbers
1.8
0.7
5
24
3
2
-3.222…
Integers
-5 -12
What you really need to know!
Whole Numbers
6 150
Natural Numbers
1, 2, 3 ,...
Irrational Numbers: , 2.01020304...
Page 441
Example 1:
Name all the sets of numbers to which each real number belongs.
17Natural NumberNatural Number
Whole NumberWhole Number
IntegerInteger
Rational NumberRational Number
Example 1b:
Name all the sets of numbers to which each real number belongs.
IntegerInteger
Rational NumberRational Number6
72
)12(
Example 1c:
Name all the sets of numbers to which each real number belongs.
Natural NumberNatural Number
Whole NumberWhole Number
IntegerInteger
Rational NumberRational Number
225
)15(
Example 1d:
Name all the sets of numbers to which each real number belongs.
irrational numberirrational number
52...211102551.7
Example 2:
Replace the ? with <, > or = to make a true statement.
8
711 ? 125 <
Example 2b:
Order from least to greatest.
36 ,56. ,38 ,4
16
56.4
163836
Example 3:
Solve the equation. Round to nearest tenth if necessary.
169w 2 169w 2
13or 13w
Example 3:
Solve the equation. Round to nearest tenth if necessary.
50r2 50r2
1.7or 1.7r
Page 443
Guided Practice
#’s 3-12
Pages 441-443 with someone at home and
study examples!
Read:
Homework: Pages 444-445
#’s 14-28 even, 34-42 even, 46-60 even, 64, 65, 69-71, 77, 78
Lesson Check 9-2
Page
745
Lesson 9-2
Lesson Check 9-2
Page 441
Page 441