Page 252 - Basic College Mathematics with Early Integers

S E C T I O N 3.5 I ADDING AND SUBTRACTING UNLIKE FRACTIONS 229

9 3 4 2 11 2 2 3
25. - 26. - 27. - 28. -
14 7 5 15 35 7 5 25

1 5 5 7 7 5 5 3
29. - 30. - 31. - 32. -
9 12 18 12 15 12 8 20

5 1 10 7 7 3 7 2
33. - 34. - 35. + 36. - -
7 8 13 10 8 16 18 9

5 3 4 1 2 1 3 1 1 2
37. + 38. - 39. - + - 40. - - +
9 9 13 13 5 3 10 3 4 5
5 3 1 3 7 1 9 3
41. - - 42. - 43. - 44. -
6 7 2 29 9 6 16 8

5 3 3 9 7 5 7 3
45. + 46. + 47. - 48. -
11 13 7 17 30 12 30 20

6 3 1 6 3 1 4 4 11 7
49. - + 50. + - 51. + 52. -
5 4 2 5 4 2 5 9 12 24

9 17 1 5 3 1 1 1 1 1
53. - + - 54. - + - 55. - 56. -
12 24 6 14 7 2 1000 100 500 50

Objective Insert 6 or 7 to form a true sentence. See Examples 7 and 8.

2 3 5 6 5 13 7 5 3 11 2 3
57. 58. 59. - 60. - 61. - - 62. - -
7 10 9 11 6 15 8 6 4 14 9 13

1 3
Objective Evaluate each expression if x = and y = . See Example 9.
3 4
63. x + y 64. x - y 65. xy 66. x , y 67. 2y + x 68. 2x + y

Objective Find the perimeter of each geometric figure. (Hint: Recall that perimeter means distance around.)

69. R cm 70.
ç mile
a cm Parallelogram
a cm ≈ mile Triangle
R cm
q mile

71. Q meter 72. Rectangle ¡ yard
~ meter
Quadrilateral 10 yard
q meter 21

! meter