Page 50 - Basic College Mathematics with Early Integers

S E C T ION 1. 3 I ADDING WHOLE NUMBERS AND PERIMETER 27

83. The state of Delaware has 2029 miles of urban 84. The state of Rhode Island has 5193 miles of urban
highways and 3865 miles of rural highways. Find the highways and 1222 miles of rural highways. Find the
total highway mileage in Delaware. (Source: U.S. total highway mileage in Rhode Island. (Source: U.S.
Federal Highway Administration) Federal Highway Administration)

295
44

6
95

1

95

1 1

Concept Extensions

85. In your own words, explain the commutative 86. In your own words, explain the associative property
property of addition. of addition.

87. Give any three whole numbers whose sum is 100. 88. Give any four whole numbers whose sum is 25.

89. Add: 56,468,980 + 1,236,785 + 986,768,000 90. Add: 78,962 + 129,968,350 + 36,462,880

Check each addition below. If it is incorrect, find the correct answer. See the Concept Check in this section.

91. 566 92. 773 93. 14 94. 19
932 659 173 214
+ 871 + 481 86 49
2369 1913 + 257 + 651
520 923