1. 1.2 Operations With Rational Numbers Formulas Page 22 How do you use this to convert 350º F?

2. 1.2 Operations With Rational Numbers Discover the Math Page 22 1 a) Evaluate i) -2 x 4 ii) -9 ÷ 3 iii) -18 ÷ (-6) iv) 10 x (-2) When you multiply or divide two integers with the same sign the result is ……………………. When you multiply or divide two integers with different signs the result is …………………….

3. 1.2 Operations With Rational Numbers Discover the Math Page 23 2 a) Evaluate. Will the answer be negative or positive? a) -3.0 x 0.8 b) -3.6 ÷ 0.9 c) -3.0 ÷ (-0.5) d) 2.0 x (-0.25) 3. Rewrite each expression in question 2 using fractions and evaluate

4. 1.2 Operations With Rational Numbers Part B Mental math Strategies Page 23 1. Calculate using mental math strategies. a) 241 +353 b) 7.55 +2.45 c) 3528 ÷ 7

5. 1.2 Operations With Rational Numbers Part B Mental math Strategies Page 23 4. Explain how you can mentally evaluate in two different ways

6. 1.2 Operations With Rational Numbers Part C Estimation Strategies Page 23 4. Estimate. Explain or show how you got your answer.

7. 1.2 Operations With Rational Numbers Page 24

8. 1.2 Operations With Rational Numbers Page 24

9. 1.2 Operations With Rational Numbers Example 2 Apply Rational Numbers (Stock market) Page 25 Stock Sales (100’s) High($) Low($) Close($) Net change Matrix

10. 1.2 Communicate the Key Ideas 1. Which mental math strategy would you use? Page 26 2. Steve’s Problem What is the first step? What could he do next?

11. 1.2 Check Your Understanding Page 27 A) # 1 Evaluate. Use mental math as much as possible

12. 1.2 Check Your Understanding Page 27 A) # 1 Evaluate. Use mental math as much as possible

13. 1.2 Check Your Understanding Page 27 B) # 1 Evaluate. Use mental math as much as possible

14. 1.2 Check Your Understanding Page 27 B) = = = =

15. 1.2 Check Your Understanding Page 27 # 1 Evaluate. Use mental math as much as possible C)

16. 1.2 Check Your Understanding Page 27 # 1 Evaluate. Use mental math as much as possible C)

17. 1.2 Check Your Understanding Page 27 # 1 Evaluate. Use mental math as much as possible D)

18. 1.2 Check Your Understanding Page 27 # 1 Evaluate. Use mental math as much as possible D) = = = =

19. Page 27 = = = = = =

20. 1.2 Check Your Understanding Page 27 # 2 Evaluate each expression. Show your work. 2. A

21. 1.2 Check Your Understanding Page 27 # 2 Evaluate each expression. Show your work. B)

22. 1.2 Check Your Understanding Page 27 # 2 Evaluate each expression. Show your work. B)

23. Page 27 c) # 2 Evaluate each expression. Show your work.

24. Page 27 c)

25. Page 27 c)

26. 1.2 Check Your Understanding Page 27 # 2 Evaluate each expression. Show your work. d)

27. 1.2 Check Your Understanding Page 27 # 2 Evaluate each expression. Show your work. d)

28. 1.2 Check Your Understanding Page 27 # 3 Exact or estimate? Explain a) An exact number is required in order to compare the two students. b) An exact number is required in order to compare the two students. c) An exact number is required in order to compare the two students.

29. 1.2 Check Your Understanding # 4 Costa and the old math book.

30. 1.2 Check Your Understanding Page 27 # 4 Costa and the old math book.

31. 1.2 Check Your Understanding Page 27 # 4 iii Costa and the old math book.

32. 1.2 Check Your Understanding Page 27 # 5 Daffodil Campaign 937.5 So far $4687.5 has been raised for this daffodil campaign

33. 1.2 Check Your Understanding Page 28 6. Complete the Magic Square a)

34. 1.2 Check Your Understanding 6. Complete the Magic Square b) Page 28

35. 1.2 Check Your Understanding Page 28 8. Skill testing question “Take 15, multiply it by one-half, add three, and subtract two and one-half.” Write an expression for this equation. Is this just a trick?

36. 1.2 Check Your Understanding page 28 Tomas would have made $150 if he sold the 200 shares at the highest price of the day. 9. Celetica Stocks

37. 1.2 Check Your Understanding Page 28 10. Write problems based on question 9 using each expression.

38. 1.2 Check Your Understanding Page 29 11. Use decimals for question 11.

39. 1.2 Check Your Understanding Page 29 12. Use exactly four 4s to get 0-50. Answers must be exact

40. 1.2 Check Your Understanding Page 29 13. Formula for the area of a trapezoid is a h b If a = 3.5 units and b = 4.4 units, draw a graph of the area of the trapezoid as the height increase from 1 to 5 units. What pattern do you see?

41. 1.2 Check Your Understanding Page 29 # 15 Evaluate without a calculator.

42. 1.2 Check Your Understanding Page 29 # 15 Evaluate without a calculator.

43. 1.2 Operations With Rational Numbers Order of Operations 1. 2. 3. 4. 5. 6. 7. 8. Page

44. Grade 9 Math October 2007 Order of Operations 9. 10. 11. 12. 13. 14. 15. 16.

45. Grade 9 Math October 2007 Order of Operations 1. 2. 3. 4.

46. Grade 9 Math October 2006 Order of Operations 5. 6. 7. 8.

48. 1. 3. 2. 4. 5. 7. 6. 8.

49. 9. 11. 10. 12.

50. 13. 15. 14. 16.

51. 17. 19. 18. 20.

52. 21. 23. 22. 24.

53. 25. 28. 26. 27.

54. 1. 3. 2. 4. 5. 6. Order of operation 2

55. 7. 9. 8. 10. 11. 12. Order of operation 2

56. Oct 10

63. 2. Page 27

67. 2d. Page 27

68. 3. Page 27

70. 4. Page 27

71. 5. Page 27

72. 5. Page 28 937.5 So far $4687.5 has been raised for this daffodil campaign

73. page 28

75. 9.a) page 28

76. page 28 15. Find the value of the expression. No calculator. a)

77. The End