85) a 2 3 b 3 a 2 9 b 2 86) a 5 4 b 3 a 5 8 b 2 87) 15 4 5 10 3 88) 18 5 8 16 3 89) a 3 4 b 2 a 1 2 b 3 a 1 2 3 4 b 90) a 2 3 b 2 a 2 15 1 2 b 3 5 R1) Why does it make sense to learn how to compare fractions before learning to use exponents and the order of operations? R2) Based on Exercises 63–66, what happens when you square a proper fraction? R3) Based on Exercises 67–70, what happens when you square an improper fraction? Group Activity – Adding and Subtracting Fractions • Students should work in pairs. • The object of this activity is to fi ll in the blank boxes in the 4 4 grid below so that the sum of the fractions in each row, column, and the two diagonals is equal to 1. • There are 10 numbers listed below the grid and there are 10 empty boxes. Use the numbers in the list to fi ll in the empty boxes. Once you have used a number from the list, you can cross it out. Each number in the list will be used only once. 1 30 , 1 10 , 31 60 11 30 , 7 30 , 0, 1 4 , 2 15 , 1 3 , 11 60 , 13 30 Group Activity Answers Row 1: 1 30 ; Row 2: 0, 2 15 , 13 30 ; Row 3: 7 30 , 11 60 , 1 4 , 1 3 ; Row 4: 11 30 , 1 10 19 60 2 15 13 30 1 4 17 60 278 CHAPTER 4 Adding and Subtracting Fractions www.mhhe.com/messersmith
messersmith_power_basic_college_1e_ch4_7_10
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