In exercises 25-29, apply the divisibility tests for 2, 3, 5, 6, and 8. 28. 120 29. 250 25. 80 26. 525 27. 184 In exercises 30-39, reduce the fractions to lowest terms. 125 34. $50 42 33. 315 900 30. 31. 15 32. 25 72 3360 39. 1450 160 170 38. 35. 212 37. 3920 1700 320 36. 240 850 In exercises 40-44, perform the operation(s) indicated and reduce the answer to lowest terms, 33 44 44. 25 32 4 15 30 43. 26 35 49 |+ 39 40. 48 50 41. . 9 25 32 42. 74 28 In exercises 45-49, check whether the given fractions are equivalent. -12 18 6 16 45. 4 -20 46. 25 8 14 49. 9' 45 47. 48. 12 ' 21 14 ' -21 15' 40 7' 35 In exercises 50-52, list the group of fractions in increasing order. 50. 2 3 4 1 1 3' 4'5 51. . 5' 6' 7 52. 2 5 3' 9' 12 In exercises 53-55, perform the operations indicated. 53. 3 5 2 54. 1 5_1 10 6 55. 12 - 3 + ( 3 - 3 + 5 - 4 12 8 56. Divide the difference of 2- and _ by the sum of _ and . 57. Find the average of the following group of numbers: (a ) 2 , 7, 2- (b ) 5, 1, 13 11 8' 12 (c) 57, 42, Give the word name for the following decimal numbers: (a) 213.07 (b 123.456 (c) 1,023,045,067.089 59. Write the decimal numbers of the following word names: (d) 789.003 (a) Forty-one and one hundredth (b) One million, three hundred twenty-one and six thousandths. (a) 59,123+7,854 60. Estimate the sum or difference, by rounding each number to its largest place (front-end rounding). (b) 0.9932+0.9512 (c) -36.673+39.999 (a) 8.95x7.54 61. Estimate the product, by rounding each number to its largest place (front-end rounding). (d) 7,654.891 -849.999 (b) 281.71 x349.56 (c) 2,813.69 x84.99 CH-1: Review of Pre-Algebra 54