Section 1.6 Division of Whole Numbers 59 For Exercises 19–30, use the properties of division to simplify the expression, if possible. (See Example 2.) 15 1 2121 0 10 19. 20. 21. 22. 20 20 09 4 0 23. 24. 25. 26. 5 1 16 0 27. 28. 29. 30. 0 3 19 80 13 13 31. Show that 6 3 2 but 3 6 2 by using multiplication to check. 32. Show that division is not associative, using the numbers 36, 12, and 3. Concept 3: Long Division 33. Explain the process for checking a division problem when there is no remainder. 34. Show how checking by multiplication can help us remember that 0 5 0 and that 5 0 is undefined. For Exercises 35–46, divide and check by multiplying. (See Examples 3 and 4.) 35. 36. 37. 38. 78 6 364 7 5205 8152 Check: Check: Check: Check: 6 78 7 364 5 205 8 152 582 6 972 2 39. 40. 41. 42. 1227 3 236 4 4932 6 43. 44. 45. 46. 51015 52035 For Exercises 47–54, check each division problem. If it is incorrect, find the correct answer. 82 56 47. 48. 49. 50. 3619 7 761 3 253 604 5 120 25 R6 7574 1311 6 4224 1021 9 51. 52. 53. 54. 8 203 218 R3 113 R4 For Exercises 55–70, divide and check the answer. (See Example 5.) 55. 56. 57. 58. 117 R5 7 821 61 8 89 3 992 574 49 3 55 2 59. 60. 61. 62. 428 8 382 9 593 3 801 4 63. 64. 65. 66. 3115 2 4715 6 67. 6014 8 68. 9013 7 69. 65012 70. 21101
miller_basic_college_math_3e_ch1_3
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