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8th Math - Pre-Algebra > Test 6, Units 1-5, Semester Exam > Flashcards

Test 6, Units 1-5, Semester Exam Flashcards

1
Q

9384

x 687

A

6,446,808

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2
Q

212,217 divided by 381

A

557

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3
Q

.095

x6.21

A

.58995

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4
Q

17.187 divided by .337

A

51

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5
Q

1 1/4

7 2/3

+ 3 1/2

A

1 3/12

7 8/12

+ 3 6/12

11 17/12 = 12 5/12

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6
Q

19 5/8

  • 6 3/4
A

19 5/8 = 18 13/8

  • 6 6/8 = - 6 6/8
                12  7/8
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7
Q

12 1/2 x 2/5 =

A

25/2 x 2/5 =

5/1 x 1/1 = 5

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8
Q

6/7 divided by 9/14 =

A

6/7 x 14/9 =

2/1 x 2/3 =

4/3 = 1 1/3

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9
Q

12/18 = x/24

A

18x = 288

18x/18 = 288/18

x = 16

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10
Q

1 1/2 % of 312

A

312 x .015 =

4.68

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11
Q

250% of 50

A

50 x 2.5 =

125

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12
Q

6 is 25% of what number?

A

6 divided by .25 =

24

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13
Q

20 is what percent of 80?

A

20/80 =

1/4 = 25%

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14
Q

(-6) x (-4)

A

24

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15
Q
  • 11
  • (+8)
A

-19

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16
Q

(-36) divided by (4)

A

-9

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17
Q

5x2(4xy2)

A

20x3y2

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18
Q

(24a3b2) divided by 4a2b5

A

24a3b2 = 6 a

4a2b5 = b3

6a/b3

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19
Q

26

A

2 x 2 x 2 x 2 x 2 x 2

4 x 4 x 4

16 x 4

64

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20
Q

square root of 5,776

A

76

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21
Q

nonterminating, nonrepeating decimal

A

irrational number

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22
Q

hundredth

A

percent

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23
Q

number with only 1 and itself as factors

A

prime number

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24
Q

first term in a ratio

A

antecedent

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25
Q

second term in a ratio

A

consequent

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26
Q

number with more than two factors

A

composite number

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27
Q

distance covered in a unit of time

A

speed

28
Q

Write the prime factors of 36 using exponents

A

36 = 2 x 2 x 3 x 3

22 x 32

29
Q

reduce 16/24 to lowest terms

A

2/3

30
Q

write 5/8 as a decimal

A

.625

31
Q

round off 176,372,982 to the nearest hundred thousand.

A

176,400,000

32
Q

write the principal square root of 9

A

3

33
Q

find the value of 6 + 82 (12-11)

A

6 + 64(1)

70

34
Q

write 1/6 as a repeating decimal.

A

.16 with a line over the 6

35
Q

Evaluate 3xy + b if x = -4, y = 2, and b = 5

A

3(-4)(2) + 5

  • 24 + 5
  • 19
36
Q

write the least common multiple of 9, 12, 15

A

9 = 3 * 3

12 = 2 * 2 * 3

15 = 3 * 5

lcm = 2 * 2 * 3 * 3 * 5 = 180

37
Q

write the number of quarts in a peck

A

8

38
Q

convert .75 mile to feet

A

5,280 x .75

3960

39
Q

solve the equation 4x - 7 = 2x + 7

A

4x - 2x - 7 = 2x - 2x + 7

2x - 7 + 7 = 7 + 7

2x = 14

x = 7

40
Q

write 1 1/2% as a decimal

A

.015

41
Q

convert 38 ounces to pounds

A

38 divided by 16

2 3/8 lb.

42
Q

subract 4 min. 18 sec. from 10 min.

A

9 min 60 sec

  • 4 min 18 sec

5 min 42 sec

43
Q

find the percent of increase to the nearest whole percent from 12 to 20

A

Increase from 12 to 20 is 8:

8 over the original amount:

8/12 = 2/3 = 67%

44
Q

find an 18% discount on a list price of $25

A

$25

x.18

$4.50

45
Q

simplify 4x2 - 3xy + 2xy + 9x2

A

13x2 - xy

46
Q

find the speed of a car that travels 210 miles in 5 hours

A

210 divided by 5

42 mph

47
Q

find the commission on a sale of $24,618 at 1 1/2%

A

$24,618 x .015

$369.27

48
Q

solve x/5 + 2 = 12 - 7

A

x/5 + 2 = 5

x/5 + 2 -2 = 5-2

x/5 = 3

5 * x/5 = 3 * 5

x = 15

49
Q

.3x - 3 = .9

A

3x - 30 = 9

3x - 30 + 30 = 9 + 30

3x = 39

3x/3 = 39/3

x = 13

50
Q

6x - 9 = 4x + 3

A

6x - 4x - 9 = 4x-4x + 3

2x - 9 + 9 = 3 + 9

2x = 12

x = 6

51
Q

2/5x + 5 = 3 + 7

A

2/5x + 5 = 10

2/5x + 5 - 5 = 10 - 5

2/5x = 5

5/2 * 2/5x = 5/2 * 5

x = 25/2

x = 12.5

52
Q

write an equation to show two times a certain number is 8

A

2x = 8

53
Q

write the number of terms in a binomial

A

2

54
Q

write the number of years in a century

A

100

55
Q

____dL = 1 hL

A

milli, centi, deci, unit, deka, hecto, kilo

from hecto to deci is 3 places, so move 3 places right

1000

56
Q

____mL = 1kL

A

milli, centi, deci, unit, deka, hecto, kilo

from kilo to milli is 6 places, so move 6 places right:

1,000,000

57
Q

___kg = 35 lb. (to the nearest tenth)

A

.45 x 35 = 15.75 = 15.8

58
Q

___qt. = 16 liters (nearest tenth)

A

1.06 x 16 = 16.96 = 17.0

59
Q

___oC = 68oF

A

C = 5/9(68 - 32)

C = 5/9(36)

C = 20

60
Q

write using scientific notation

43,000,000

A

4.3 x 107

61
Q

write using scientific notation

.000631

A

6.31 x 10-4

62
Q

write using scientific notation

8,463.8

A

8.4638 x 103

63
Q

expanded form:

1.06 x 10-4

A

.000106

64
Q

expanded form:

5.4 x 105

A

540,000

65
Q

expanded form:

3.8 x 107

A

38,000,000

8th Math - Pre-Algebra (43 decks)

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