10) Is this statement true or false? The least common denominator of 5 6 and 7 10 is 60. 11) In your own words, explain how to add unlike fractions. 12) If the sum of two fractions is 13 5 , can it also be written as 2 3 5 ? Add. 13) 1 3 5 12 14) 1 6 7 18 15) 1 2 2 3 16) 2 3 2 5 17) 4 9 15 27 18) 3 8 35 56 19) 3 8 5 12 20) 2 9 1 6 21) 5 6 9 20 22) 9 10 11 15 23) 7 12 3 7 24) 7 8 2 9 25) 1 2 1 4 1 8 26) 1 3 1 6 1 9 27) 3 10 3 20 5 8 28) 5 6 7 8 5 12 29) 1 4 11 12 5 6 30) 9 10 1 4 17 20 31) 7 16 11 24 2 3 32) 7 24 5 9 11 18 Add the fractions vertically. 33) 5 6 3 4 34) 3 8 2 3 35) 7 10 1 6 36) 5 6 1 10 37) 5 8 3 14 38) 3 28 1 12 Objective 2: Subtract Unlike Fractions Subtract. 39) 6 7 13 21 40) 3 4 3 8 41) 5 8 7 24 42) 4 5 3 10 43) 8 9 2 5 44) 10 11 1 4 45) 6 8 3 4 46) 9 15 3 5 47) 11 15 3 10 48) 7 8 5 12 Subtract the fractions vertically. 49) 11 12 2 9 50) 13 15 3 4 51) 5 12 3 11 52) 7 12 3 7 53) 9 10 1 6 54) 9 16 1 6 55) Do you prefer to add and subtract fractions horizontally or vertically? Why? 56) True or false: 7 10 7 8 0 2 0 Objective 3: Add and Subtract Fractions with Large Denominators 57) When is prime factorization a good method for fi nding a least common denominator? 58) In addition to prime factorization, what is another good method for fi nding the LCD of fractions with large denominators? Add or subtract as indicated. Find the LCD using prime factorization. 59) 14 45 17 30 60) 7 20 12 35 61) 23 42 13 24 62) 31 36 19 42 63) 11 24 9 28 64) 31 36 3 16 65) 47 56 29 32 66) 11 18 17 26 67) 32 35 8 15 8 21 68) 19 24 3 56 31 42 254 CHAPTER 4 Adding and Subtracting Fractions www.mhhe.com/messersmith
messersmith_power_basic_college_1e_ch4_7_10
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