14 m Section 1.3 Addition and Subtraction of Whole Numbers and Perimeter 27 12 m ? 139 cm 87 cm ? 201 cm For Exercises 115 and 116, find the missing length. 115. The perimeter of 116. The perimeter of the triangle is 39 m. the figure is 547 cm. Calculator Connections Topic: Adding and Subtracting Whole Numbers The following keystrokes demonstrate the procedure to add numbers on a calculator. The key (or on some calculators, the key or key) tells the calculator to complete the calculation. Notice that commas used in large numbers are not entered into the calculator. Expression Keystrokes Result 175574 Your calculator may use the key or key. 92,406 83,168 92406 83168 To subtract numbers on a calculator, use the subtraction key, . Do not confuse the subtraction key with the key. The will be presented later to enter negative numbers. Expression Keystrokes Result 345899 43018 302881 345,899 43,018 Calculator Exercises For Exercises 117–122, perform the indicated operation by using a calculator. 117. 118. 119. 120. 121. 122. For Exercises 123–126, refer to the table showing the land area for five states. 82,025,160 79,118,705 953,400,415 56,341,902 4,905,620 458,318 3,421,019 822,761 1,003,721 9,678 9,300,050 7,803,513 3,480,009 907,822 45,418 81,990 9,063 56,309 State Land Area (mi2) Rhode Island 1045 Tennessee 41,217 West Virginia 24,078 Wisconsin 54,310 Colorado 103,718 123. Find the difference in the land area between Colorado and Wisconsin. 124. Find the difference in the land area between Tennessee and West Virginia. 125. What is the combined land area for Rhode Island,Tennessee, and Wisconsin? 126. What is the combined land area for all five states?
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