Section 1.4 Subtraction of Real Numbers 83 For Exercises 6–8, simplify the expression. 6. 42 6 2 13 7. 1 36 9 2 9 8. 14 010 6 0 10 Concept 1: Subtraction of Real Numbers For Exercises 9–14, fill in the blank to make each statement correct. 9. ________ 3 10. ________ 7 11. ________ 12. 4 9 4 ________ 9 13. 7 142 7 ________ 4 14. 13 142 13 ________ 12 4 5 3 5 8 7 8 2 12 2 For Exercises 15–60, simplify. (See Examples 1 and 2.) 15. 3 5 2 16. 9 12 3 17. 3 152 8 18. 9 1122 21 19. 8 20. 21 21. 22. 4 3 5 9 12 3 152 2 9 152 23 17 6 14 2 12 23 1172 40 14 122 16 23. 24. 25. 26. 27. 23 17 40 28. 14 2 16 29. 23 (23) 0 30. 14 (14) 0 31. 6 14 20 32. 9 12 21 33. 7 17 24 34. 8 21 29 35. 13 (12) 36. 20 (5) 37. 14 (9) 5 38. 21 (17) 4 5 6b 41 4 3 b 5 3 39. 40. 41. 42. 1 6 b 1 4b 1 43. 44. 45. 46. 47. 6.8 (2.4) 9.2 48. 7.2 (1.9) 9.1 49. 3.1 8.82 5.72 50. 1.8 9.59 7.79 51. 4 3 2 1 52. 10 9 8 7 53. 6 8 2 10 54. 20 50 10 5 55. 10 (14) 6 22 56. 3 (8) (11) 6 20 12 57. 112.846 (13.03) 47.312 173.188 58. 96.473 (36.02) 16.617 149.11 59. 0.085 (3.14) 0.018 60. 0.00061 (0.00057) 0.0014 3.243 0.00258 Concept 2: Translations For Exercises 61–70, translate each English phrase into an algebraic expression. Then evaluate the expression. (See Example 3.) 61. Six minus 7 62. Eighteen minus 1 6 172; 13 18 112; 19 63. Eighteen subtracted from 3 64. Twenty-one subtracted from 8 65. The difference of 5 and 11 66. The difference of 2 and 18 3 18; 15 8 21; 13 5 1112; 6 2 1182; 16 67. Negative thirteen subtracted from 1 68. Negative thirty-one subtracted from 19 69. Twenty less than 32 32 20; 52 70. Seven less than 3 3 7; 10 17 24 7 8 a 2 3 11 12 a 14 2 7 3 14 2 5 1 2 1 10 23 15 7 10 a 24 3 8 a 17 9 2 9 3 2 6 5 3 10 25 25 10 34 14 45 1 1132; 12 19 1312; 12 Writing Translating Expression Geometry Scientific Calculator Video
miller_introductory_algebra_3e_ch1_3
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