Section 2.6 Multiplication and Division of Mixed Numbers 149 Mixed Exercises For Exercises 57–76, perform the indicated operation. Write the answer as a mixed number, proper fraction, or whole number. 1 3 6 1 57. 58. 59. 60. 1 12 61. 62. 63. 64. 8 9 10 0 65. 66. 67. 68. 2 15 12 69. 70. 71. 72. a3 b 73. 74. 75. 76. Expanding Your Skills 77. A landscaper will use a decorative concrete border around the cactus garden 114 shown. Each concrete brick is ft long and costs $3.What is the total cost of the border? 12 1 2 78. Sara drives a total of 64 mi to work and back. Her car gets 21 miles per gallon (mpg) of gas. If gas is $5 per gallon, how much does it cost her to commute to and from work each day? 15 ft 20 ft 3 1 8 5 5 7 1 5 16 7 1 8 1 1 3 2 1 4 a5 1 6 b a1 4 7 b a14 33 2 5 b a 7 34 b a3 3 4 b 0 2 1 8 6 8 9 0 20 1 8 3 8 2 1 2 0 9 2 3 2 7 1 1 2 9 5 1 3 4 6 4 3 5 1 8 2 3 2 7 10 8 2 3 5 1 3 1 4 6 8 2 1 5 1 1 10 Calculator Connections Topic: Multiplying and Dividing Fractions and Mixed Numbers Expression Keystrokes Result 8 15 25 28 2 3 4 1 6 8 15 2 3 4 25 28 1 6 ⎫⎪⎪⎪⎬⎪⎪⎪⎭ 34 This is how you enter the mixed number 2. To convert the result to an improper fraction, press Calculator Exercises For Exercises 79–86, use a calculator to multiply or divide and simplify. Write the answer as a mixed number. 79. 80. 83. 84. 106 1 9 41 5 6 32 7 12 12 1 6 38 1 3 12 1 2 12 2 3 25 1 8 81. 82. 85. 86. 9 8 9 28 1 3 11 1 2 41 3 4 25 1 5 18 1 2 56 5 6 3 1 6 10 _| 21 10 21 16 _ 1 _| 2 16 1 2 33 _| 2 33 2
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