18 Chapter 1 Whole Numbers Concept 3: Properties of Addition For Exercises 52–55, rewrite the addition problem, using the commutative property of addition. (See Example 6.) 52. 12 6 53. 30 21 54. 101 44 55. 8 13 For Exercises 56–59, rewrite the addition problem using the associative property of addition, by inserting a pair of parentheses. 56. 14 82 13 4 8 13 57. 123 92 10 23 9 10 7 112 82 7 12 8 41 13 222 41 3 22 Concept 4: Translations and Applications Involving Addition For Exercises 62–70, translate the English phrase into a mathematical statement and simplify. (See Example 7.) 62. The sum of 13 and 7 63. The sum of 100 and 42 64. 45 added to 7 65. 81 added to 23 66. 5 more than 18 67. 2 more than 76 68. 1523 increased by 90 69. 1320 increased by 448 70. The total of 5, 39, and 81 For Exercises 71–78, write an English phrase from the mathematical statement. Answers may vary. 71. 54 24 72. 33 15 73. 12 88 74. 70 15 75. 4 23 77 76. 11 41 53 77. 10 8 78. 25 14 79. The attendance at a high school play during one weekend was as follows: 103 on Friday, 112 on Saturday, and 61 at the Sunday matinee.What was the total attendance? (See Example 8.) 80. To schedule enough drivers for an upcoming week, a local pizza shop manager recorded the number of deliveries each day from the previous week: 38, 54, 44, 61, 97, 103, 124.What was the total number of deliveries for the week? 81. Three top television shows entertained the following number of viewers in one week: 21,209,000 for Dancing with the Stars, 20,836,000 for American Idol (Tuesday), and 16,448,000 for NCIS. Find the total number of viewers for these shows. 82. To travel from Houston to Corpus Christi, a salesperson must stop in San Antonio. If it is 195 mi from Houston to San Antonio and 228 mi from San Antonio to Corpus Christi, how far will she travel on this trip? 83. Nora earned $43,000 last year. This year her salary was increased by $2500.What is her present salary? 84. The number of participants in the Special Olympics increased by 1,205,655 since it began in 1968 with 1000 athletes. How many athletes are presently participating? 58. 59. 60. Explain the difference between the commutative and associative properties of addition. 61. Explain the addition property of 0. Then simplify the expressions. a. b. c. 67 0 423 0 0 25
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