78 Chapter 1 The Set of Real Numbers Skill Practice Subtract. 1 7 5. a b 6 126. 7.5 1.5 Classroom Examples: p. 83, Exercises 64 and 70 Example 2 3 20 3 20 a a 9 60 9 60 25 60 5 12 4 15b 4 15b a 16 60b a16 60b 2.3 6.04 2.3 16.042 2. Translations 2.3 6.04 Translating Expressions Involving Subtraction Example 3 Write an algebraic expression for each English phrase and then simplify the result. a. The difference of 7 and 5 b. 12.4 subtracted from 4.7 c. 24 decreased by the sum of 10 and 13 d. Seven-fourths less than one-third Solution: a. The difference of 7 and 5 Rewrite subtraction in terms of addition. 7 152 7 152 2 Simplify. Skill Practice Write an algebraic expression for each phrase and then simplify. 7. 8 less than 10 8. 7.2 subtracted from 8.2 9. 10 more than the difference of 2 and 3 10. Two-fifths decreased by four-thirds Answers 5. 6. 9 7. 10 8; 18 8. 8.2 (7.2); 1 9. (2 3) 10; 5 10. 2 5 4 3 14 15 ; 3 4 Subtracting Real Numbers Subtract. a. b. Solution: a. The least common denominator is 60. Write equivalent fractions with the LCD. Rewrite subtraction in terms of addition. Add. b. Rewrite subtraction in terms of addition. 8.34 Add. Classroom Example: p. 83, Exercise 40 Simplify by dividing the numerator and denominator by the GCF of 5.
miller_introductory_algebra_3e_ch1_3
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