1. Write the fraction as a decimal. Lesson 9.2 , For use with pages 475-480 1. 4 5 2. 5 9

2. Write the fraction as a decimal. Lesson 9.2 , For use with pages 475-480 ANSWER 0.8 1. 4 5 2. 5 9 ANSWER 0.5

3. RATIONAL and IRRATIONAL NUMBERS 9.2

6. 1, 2, 3, 4, etc. 0, 1, 2, 3, 4, 5 .. –2, –1, 0, 1, 2, . Rational and irrational numbers Can be written as a fraction Can’t be written as a fraction

13. GUIDED PRACTICE for Example 1 Tell whether the number is rational or irrational . Explain your reasoning. 5 8 1.

14. GUIDED PRACTICE for Example 1 Tell whether the number is rational or irrational . Explain your reasoning. 5 8 1. Rational because if we write it in its decimal form then it would be 0.625 which is terminating so it is a rational number ANSWER

15. GUIDED PRACTICE for Example 1 Tell whether the number is rational or irrational . Explain your reasoning. 2.

16. GUIDED PRACTICE for Example 1 Tell whether the number is rational or irrational . Explain your reasoning. 2. ANSWER Irrational because it is not a perfect square 2.64579131 . . . .

17. GUIDED PRACTICE for Example 1 Tell whether the number is rational or irrational . Explain your reasoning. 3.

18. GUIDED PRACTICE for Example 1 Tell whether the number is rational or irrational . Explain your reasoning. 3. ANSWER Rational because it is a perfect square

19. GUIDED PRACTICE for Example 1 Tell whether the number is rational or irrational . Explain your reasoning. 4. 2 9

20. GUIDED PRACTICE for Example 1 Tell whether the number is rational or irrational . Explain your reasoning. 4. 2 9 ANSWER Rational because if we write it in its decimal from then it would be 0.2 where 2 repeating so it is a rational number

21. EXAMPLE 1 Number Rational Rational Irrational Terminating Repeating Non terminating and non repeating Classifying Real Numbers Type Decimal Form Type of Decimal a. 3 4 b. 1 11 c. 3 11 1 = 0.0909… = 0.09 3 = 1.7320508 . . . 3 4 = 0.75 3