When an expression contains addition and subtraction, perform the operations from left to right. Therefore, we must fi rst fi nd 4 25 12 . Then, add 7 12 . 4 1 25 12 7 12 Write 4 as 4 1 . Write 4 1 and 25 12 with the LCD, 12. Subtract. Perform operations from left to right. Add. Write the answer in lowest terms as an improper fraction or mixed number. 48 12 25 12 7 12 23 12 7 12 30 12 5 2 or 2 1 2 YOU TRY 4 Simplify each expression using the order of operations. a) 1 2 2 3 8 b) 9 7 a 3 2 5 7 b c) 4 11 6 11 a 1 3 b 2 14 33 ANSWERS TO YOU TRY EXERCISES 1) a) b) c) d) 2) a) b) 3) a) 8 125 b) 1 144 4) a) 7 12 b) 7 2 or 3 1 2 c) 0 4.6 Exercises Do the exercises, and check your work. Objective 1: Compare Fractions Fill in the blank with or . 1) 2 3 _____ 1 3 2) 1 8 _____ 3 8 3) 5 12 _____ 7 12 4) 4 11 _____ 3 11 5) 12 5 _____ 13 5 6) 23 14 _____ 19 14 7) 3 5 7 _____ 3 4 7 8) 2 8 9 _____ 2 7 9 9) 5 1 6 _____ 5 5 6 10) 4 5 8 _____ 4 3 8 11) 4 5 _____ 1 12) 1 _____ 5 6 13) 63 6 _____ 10 14) 53 7 _____ 8 15) Explain, in your own words, how to compare fractions with different denominators. 16) Is this statement true or false? As you move to the right on the number line, the numbers get larger. Fill in the blank with or . 17) 2 3 _____ 5 6 18) 5 8 _____ 11 16 19) 5 6 _____ 13 18 20) 3 4 _____ 19 24 21) 4 3 _____ 5 4 22) 11 7 _____ 13 9 23) 5 7 _____ 5 6 24) 3 8 _____ 5 12 25) 1 2 _____ 1 9 26) 1 3 _____ 1 8 276 CHAPTER 4 Adding and Subtracting Fractions www.mhhe.com/messersmith
messersmith_power_basic_college_1e_ch4_7_10
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