Page 244 - Basic College Mathematics with Early Integers

INTEGRATED REVIEW 221

Find the LCD of each list of fractions. 25.

3 1 1 11 5 13 17
25. , 26. , 27. , ,
5 6 2 14 6 18 30 26.

Write each fraction as an equivalent fraction with the indicated denominator.
27.
7 11 5
28. = 29. = 30. =
9 36 15 75 6 48
28.
The following summary will help you with the following review of operations on fractions.
29.
Operations on Fractions

Let a, b, c, and d be integers. 30.
a c a + c a c a - c
Addition: + = Subtraction: - =
b b b b b b 31.
(b Z 0) c c (b Z 0) c c
common denominator common denominator 32.
#
#
a c a c a c a d a d
Multiplication: # = Division: , = # =
#
#
b d b d b d b c b c
33.
(b Z 0, d Z 0) (b Z 0, d Z 0, c Z 0)
34.
Perform each indicated operation.
35.
9 3 9 3 9 2 9 2
31. + 32. - 33. # 34. ,
10 10 10 10 10 3 10 3
36.
21 3 21 3 21 3 21 3
35. - 36. + 37. , 38. #
70 70 70 70 25 70 25 70
37.
7 4 3 3 14 4 8 6
39. - # 40. - , a- b 41. - - 42. - +
9 5 11 10 27 27 45 45
38.
Solve.
39.
43. A contractor is using 18 acres of his 44. Suppose that the cross-section of a
3 piece of pipe looks like the diagram
land to sell -acre lots. How many lots
4 shown.What is the inner diameter? 40.
can he sell?
14 foot
16
41.

1 1 42.
16 foot 16 foot

43.

inner
diameter 44.