Page 319 - Basic College Mathematics with Early Integers

296 C HAPTE R 4 I DECIMALS

Objectives Mixed Practice Subtract and check. See Examples 5 through 10. For those exercises marked, also
estimate to see if the answer is reasonable.

19. 8.8 - 2.3 20. 7.6 - 2.1 21. 18 - 2.7 22. 28 - 3.3

23. 654.9 24. 863.23 25. 5.9 - 4.07 26. 6.4 - 3.04
- 56.67 - 39.453 Exact: Exact:
Estimate: Estimate:

27. 923.5 - 61.9 28. 845.93 - 45.8 29. 1000 30. 2000
- 123.4 - 327.47
Exact: Exact:

Estimate: Estimate:

31. 200 - 5.6 32. 800 - 8.9 33. -1.12 - 5.2 34. -8.63 - 5.6

35. 7.7 - 14.1 36. 10.25 - 21.76 37. -2.6 - 1-5.72 38. -9.4 - 1-10.42

39. 3 - 0.0012 40. 7 - 0.097 41. Subtract 6.7 from 23. 42. Subtract 9.2 from 45.

Objectives Mixed Practice Perform the indicated operation. See Examples 1 through 10.

43. 0.9 + 2.2 44. 0.7 + 3.4 45. -6.06 + 0.44 46. -5.05 + 0.88

47. 900.34 - 123.45 48. 800.74 - 463.98 49. 50.2 - 600 50. 40.3 - 700

51. Subtract 61.9 from 923.5 52. Subtract 45.8 from 845.9 53. Add 500.008 and 4.06 and 8.033

54. Add 400.009 and 7.05 and 6.088 55. -0.003 + 0.091 56. -0.004 + 0.085

57. -102.4 - 78.04 58. -36.2 - 10.02 59. -2.9 - 1-1.82 60. -6.5 - 1-3.32

Objective Evaluate each expression for x = 3.6, y = 5, and z = 0.21. See Example 11.

61. x + z 62. y + x 63. x - z
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64. y - z 65. y - x + z 66. x + y + z