1. Pre-algebra: semester 1 exam review
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Pre-algebra: semester 1 exam review

2. Problem 1

3. Solve
-5¼ + 5½

4. ANSWER:

5. Problem 2

6. Write the fraction as a decimal.⅜

7. ANSWER:
0.375

8. Problem 3

9. Write the fraction as a decimal.
-1 ¹∕6

10. ANSWER: …

11. Problem 4

12. Write the decimal as a fraction in simplest form.
2.3

13. ANSWER:
2 ³/10 or 23/10

14. Problem 5

15. Write the decimal as a fraction in simplest form.
4.08

16. ANSWER:
4 2/25 or /25

17. Problem 6

18. Solve.
8/9 – -2/3

19. ANSWER:
14/9 or 1 5/9

20. Problem 7

21. Solve.
-2 ½ ÷ ½

22. ANSWER: -5

23. Problem 8

24. Solve.
-8 ¼ • -3 ²∕5

25. ANSWER:
561/20 or /20

26. Problem 9

27. Write in scientific notation.
4,560

28. ANSWER:
4.56 x 10³

29. Problem 10

30. Write in scientific notation.
0.0098

31. ANSWER:
9.8 x 10-³

32. Problem 11

33. Write in standard form.
9.5 x 105

34. ANSWER:
950,000

35. Problem 12

36. Write in standard form.
8.93 x 10-6

37. ANSWER:

38. Problem 13

39. Evaluate the expression. Express in scientific notation.
(8.4 x 103) x (2.3 x 106)

40. ANSWER:
1.932 x 1010

41. Problem 14

42. Evaluate the expression. Express in scientific notation.
(4.208 x 104) ÷ (5.26 x 108)

43. ANSWER:
8 x 10-5

44. Problem 15

45. Evaluate the expression. Express in scientific notation.
(3.4 x 10-3) x (1.2 x 10-4)

46. ANSWER:
4.08 x 10-7

47. Problem 16

48. Evaluate the expression. Express in scientific notation.

49. ANSWER:
6 x 10-15

50. Problem 17

51. Evaluate. Express as a fraction.
7-2

52. ANSWER:
1/49

53. Problem 18

54. Write as a negative exponent.
1/81

55. ANSWER:
3-4

56. Problem 19

57. Write as a negative exponent.

58. ANSWER:
x-7

59. Problem 20

60. Express using exponents.
87 (83)

61. ANSWER:
810

62. Problem 21

63. Express using exponents.
(-4k4 )(7k12)

64. ANSWER:
-28k16

65. Problem 22

66. Express using exponents.54 52

67. ANSWER: 52

68. Problem 23

69. simplify.
24s4
8s3

70. ANSWER: 3s

71. Problem 24

72. Simplify.
(w4 )5

73. ANSWER:
w20

74. Problem 25

75. Write using exponents.
-4• -4• -4• -4• j • j • j

76. ANSWER:
-44j3

77. Problem 26

78. simplify.
x•x•x•y•y•y•y•8
4•x•x•x•x•y

79. ANSWER:
2y3 X

80. The End And the winners are…