Page 79 - Basic College Mathematics with Early Integers

56 C HAPTE R 1 I THE WHOLE NUMBERS

29. (780)(20) 30. (720)(80) 31. (495)(13)(0) 32. (593)(47)(0) 33. (640)(1)(10)

34. (240)(1)(20) 35. 1234 * 39 36. 1357 * 79 37. 609 * 234 38. 807 * 127

39. 8649 40. 1234 41. 589 42. 426 43. 1941 44. 1876
* 274 * 567 * 110 * 110 * 2035 * 1407

Objective Multiply. See Examples 6 through 9.

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45. 8 * 100 46. 6 * 100 47. 11 * 1000 48. 26 * 1000 49. 7406 10 50. 9054 10

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51. 6 4000 52. 3 9000 53. 50 900 54. 70 300 55. 41 80,000 56. 27 50,000
Objective Mixed Practice (Section 1.3) Find the area and the perimeter of each rectangle. See Example 10.
57. 9 meters 58. 3 inches

7 meters
13 inches

59. 17 feet 60. 25 centimeters

20 centimeters
40 feet

Objective Mixed Practice (Section 1.5) Estimate the products by rounding each factor to the nearest hundred.
See Example 13.

61. 576 * 354 62. 982 * 650 63. 604 * 451 64. 111 * 999

Copyright 2012 Pearson Education, Inc.
Without actually calculating, mentally round, multiply, and choose the best estimate.

65. 38 * 42 = 66. 2872 * 12 = 67. 612 * 29 = 68. 706 * 409 =
a. 16 a. 2872 a. 180 a. 280
b. 160 b. 28,720 b. 1800 b. 2800
c. 1600 c. 287,200 c. 18,000 c. 28,000
d. 16,000 d. 2,872,000 d. 180,000 d. 280,000