Section 2.3 Subtraction of Integers 103 Vocabulary and Key Concepts 1. a. If a and b are real numbers, then a b a . b. To write 5 (4) as an equivalent statement using addition, we write . Review Exercises For Exercises 2–7, simplify. 2. 3. 4. 34 1132 34 1132 34 13 5. 6. 7. |26| 1322 9 182 5 132 7 Concept 1: Subtraction of Integers 8. Explain the process to subtract integers. For Exercises 9–16, rewrite the subtraction problem as an equivalent addition problem. Then simplify. (See Example 1.) 9. 2 9 ____ ____ ____ 10. 5 11 ____ ____ ____ 11. 12. 4 132 ____ ____ ____ 12 182 ____ ____ ____ 13. 14. 3 15 ____ ____ ____ 7 21 ____ ____ ____ 15. 16. 11 1132 ____ ____ ____ 23 192 ____ ____ ____ For Exercises 17–52, simplify. (See Examples 1 and 2.) 17. 18. 19. 20. 35 1172 23 1122 24 9 5 15 21. 22. 23. 24. 50 62 38 46 17 1252 2 1662 25. 26. 27. 28. 8 182 14 1142 120 1412 91 1622 29. 30. 31. 32. 15 19 82 44 3 25 6 33 33. 34. 35. 36. 13 13 43 43 24 25 43 98 37. 38. 39. 40. 6 1382 75 1212 48 1332 29 1322 41. 42. 43. 44. 320 11982 444 576 1011 120202 987 13372 45. 46. 47. 48. 300 13862 575 40 605 815 2 5 132 10 4 8 12 112 49. 50. 5 6 172 4 192 2 1 1112 6 182 51. 52. 25 13 1402 35 15 1282 Concept 2: Translations and Applications of Subtraction 53. State at least two words or phrases that would indicate subtraction. 54. Is subtraction commutative; for example, does 3 7 7 3?
miller_prealgebra_2e_ch1_3
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