Step 2: Subtract the smaller absolute value from the larger absolute value. 5 12 3 8 10 24 9 24 1 24 b Larger absolute value R Smaller absolute value Step 3: Will the answer be positive or negative? It will be negative because the absolute value of 5 12 is larger than the absolute value of 3 8 . 3 8 a 5 12 b 1 24 The answer is negative. YOU TRY 4 Add. a) 78 49 b) 516 (497) c) 0.6 0.39 d) 11 16 a 15 16 b e) 7 9 5 6 Adding signed fractions can be tricky. Get a common denominator to determine which absolute value is larger so that you can determine the correct sign of the answer. ANSWERS TO YOU TRY EXERCISES 1) a) 2; 7 1 (29) 5 22 7 2 27262524 232221 0 1 2 3 4 5 6 7 9 b) 5; 23 1 8 5 5 8 23 262524 232221 0 1 2 3 4 5 6 c) 6; 22 1 (24) 5 26 24 22 262524 232221 0 1 2 3 4 5 6 2) a) 27 b) 145 c) 9642.6 d) 11 12 3) a) 4; 25 1 1 5 24 1 25 27 262524 232221 0 1 2 3 4 5 6 7 b) 4; 7 1 (23) 5 4 23 7 27 262524 232221 0 1 2 3 4 5 6 7 4) a) 29 b) 19 c) 0.21 d) 1 4 e) 1 18 730 CHAPTER 10 Signed Numbers www.mhhe.com/messersmith
messersmith_power_basic_college_1e_ch4_7_10
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