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Extra resources for Beginning Algebra, 11th Edition
To show that the multiplication should be performed before the addition, we use parentheses to group 2 # 3. 5 + 12 # 32 equals 5 + 6, or 11. 16 CHAPTER 1 The Real Number System If addition is to be performed first, the parentheses should group 5 + 2. 15 + 22 # 3 equals 7 # 3, or 21. Other grouping symbols are brackets 3 4, braces 5 6, and fraction bars. ) To work problems with more than one operation, we use the following order of operations. This order is used by most calculators and computers.
How many chairs can she cover with 23 23 yd of fabric? 105. It takes 2 38 yd of fabric to make a costume for a school play. How much fabric would be needed for seven costumes? 106. A cookie recipe calls for 2 23 cups of sugar. How much sugar would be needed to make four batches of cookies? 107. First published in 1953, the digestsized TV Guide has changed to a fullsized magazine. The full-sized magazine is 3 in. wider than the old guide. What is the difference in their heights? ) 10 12 in. 7 18 in.
103. A cake recipe calls for 1 34 cups of sugar. A caterer has 15 12 cups of sugar on hand. How many cakes can he make? 104. Kyla Williams needs 2 14 yd of fabric to cover a chair. How many chairs can she cover with 23 23 yd of fabric? 105. It takes 2 38 yd of fabric to make a costume for a school play. How much fabric would be needed for seven costumes? 106. A cookie recipe calls for 2 23 cups of sugar. How much sugar would be needed to make four batches of cookies? 107. First published in 1953, the digestsized TV Guide has changed to a fullsized magazine.