Page 290 - Basic College Mathematics with Early Integers

CHAPTER 3 REVIEW 267

(3.4) Add or subtract as indicated.

7 3 4 2 1 5
53. + 54. + 55. -
11 11 9 9 12 12

11 1 4 3 4 3 2
56. + 57. - 58. - -
15 15 21 21 15 15 15

Find the LCD of each list of fractions.

2 5 3 3 7
59. , 60. , ,
3 7 4 8 12

Write each fraction as an equivalent fraction with the given denominator.

2 ? 5 ? 7 ?
61. = 62. = 63. =
3 30 8 56 6 42

9 ? 4 ? 5 ?
64. = 65. = 66. =
4 20 5 50 9 18

Solve.
3
67. One evening Mark Alorenzo did of his homework 68. The Simpsons will be fencing in their land, which is
8
2 in the shape of a rectangle. In order to do this, they
before supper, another of it while his children
8 need to find its perimeter. Find the perimeter
1
did their homework, and after his children went to of their land.
8
bed.What part of his homework did he do that 3 mile
16
evening?
9
16 mile

(3.5) Add or subtract as indicated.

7 2 4 1 1 1 2 1
69. + 70. - 71. - + 72. - +
18 9 13 26 3 4 3 4

9 3 5 2 4 23 7 2 2 1
73. - - 74. - 75. + + 76. - -
14 7 12 9 25 75 50 3 9 6

Find the perimeter of each figure.

77. 78. Q foot E foot
fl meter Rectangle
Î foot
X meter