Free Printable Scientific notation

1.

How would you write 4.3756 x 10⁴in standard form?

(a)

2.

How would you write 0.0005 in scientific notation?

a)

50 x 10^-5

b)

5 x 10^-4

c)

5 x 10³

d)

.5 x 10³

3.

How would you write -5.6 x 10^-3 in standard form?

(a)

4.

Scientific Notation is made up of two number parts. The first part should be a number between 1 and 100.

a)

True

b)

False

5.

Scientific Notation is made up of two number parts. The second part is a power 10.

a)

True

b)

False

6.

How do you write 8.317 x 10⁶in standard form?

(a)

7.

Which of the following numbers is written in scientific notation?

a)

20.35 x 10⁴

b)

.2035 x 10⁴

c)

2035⁴

d)

2.035 x10⁴

8.

Express the following in scientific notation:

.000457

a)

457 x 10⁶

b)

457 x 10^-6

c)

4.57 x10⁴

d)

4.57 x 10^-4

9.

Convert to scientific notation:

520,000,000

a)

52 x 10⁷

b)

5.2 x 10^-7

c)

5.2 x 10⁸

d)

0.52 x 10⁹

10.

What is scientific notation?

a)

A long way to write really short numbers

b)

A short way to write really large or really small numbers

c)

I don't know...

d)

None of the above

11.

If the exponent is a positive number the original number was...

a)

a really big number.

b)

a really small number.

12.

If the exponent is a negative number the original number was...

a)

a really large number.

b)

a really small number.

13.

Convert this number to standard notation:

7.1 x 10⁴

(a)

14.

Convert this number into scientific notation:

0.068

a)

6.9 x 10⁶

b)

6.8 x 10^-9

c)

6.8 x 10^-2

d)

None of the above

15.

Convert this number to standard notation:

1.4 x 10^-2

(a)

16.

Convert this number into scientific notation:

950,000

a)

9.5 x 10⁵

b)

9.5 x 10^-9

c)

9.5 x 10²

d)

None of the above

17.

Which value is the greatest?

a)

5.0 x 10^-9

b)

5.0 x 10^-4

c)

5.0 x 10⁶

d)

5.0 x 10⁸

18.

Which number is the least in value?

a)

5.0 x 10^-9

b)

5.0 x 10^-4

c)

5.0 x 10⁶

d)

5.0 x 10⁸

19.

If the exponent on the power of 10 is a positive number...

a)

you will get a large number that is greater than 1

b)

you will get a smaller number that is less than 1

20.

Which of the following numbers is written in correct scientific notation?

a)

$64.2\cdot10^2$

b)

$6.42\cdot10^3$

c)

$0.642\cdot10^4$

d)

$6240$

21.

Which of these numbers is the smallest?

a)

3.5 x10⁷

b)

3 x10⁸

c)

5 x10⁷

d)

5.5 x10⁶

22.

To compare two numbers that are in scientific notation, first compare the (a) . If they are the same, then compare the (b) .

Choose from the below words

exponents

decimals

23.

Which of these numbers is the greatest?

a)

9 x 10⁹

b)

8.1 x10¹⁰

c)

9.02 x10⁹

d)

6.35 x10¹⁰

24.

How is the following number written in scientific notation?

450,000

a)

4.5 x 10⁵

b)

45 x 10⁵

c)

4.5 x 10⁴

d)

4.5 x 10⁶

25.

How is the number below written in scientific notation?

0.000398

a)

39.8 x 10^-5

b)

3.98 x 10^-5

c)

3.98 x 10^-4

d)

39.8 x 10^-6

26.

Which of the following is the correct way to write 3.97 x 10^-2 in standard form?

a)

0.000397

b)

0.0397

c)

0.0000397

d)

0.397

27.

Which is the correct way to write the number 3.5 x 10⁶in standard notation?

a)

0.0000035

b)

35,000,000

c)

3,500,000

d)

0.00000035

28.

If the exponent on your power of 10 is positive, is your number larger or smaller than 10?

a)

Larger

b)

Smaller

29.

7.82 x 10^-⁶ is an example of scientific notation. The exponent of -6 tells you your number will be very ________.

a)

Large

b)

Small

c)

Basic

30.

7.82 x 10^-⁶ is an example of scientific notation. The exponent of -6 tells you your number will be very ________.

a)

Large

b)

Small

c)

Basic

31.

Change from standard form to scientific notation: 12,000,000

a)

12.0 x 10⁷

b)

0.12 x 10⁷

c)

1.2 x 10⁶

d)

1.2 x 10⁷

32.

Change from standard form to scientific notation: 450,000

a)

4.5 x 10⁵

b)

45 x 10⁵

c)

4.5 x 10⁴

d)

4.5 x 10⁶

33.

Change from standard form to scientific notation: 0.000398

a)

39.8 x 10^-5

b)

3.98 x 10^-5

c)

3.98 x 10^-4

d)

39.8 x 10^-6

34.

Change from standard form to scientific notation: 0.004078

a)

4.078 x 10^-3

b)

4.078 x 10³

c)

40.78 x 10^-4

d)

.4078 x 10^-2

35.

125,678,000: Change to scientific notation

a)

1.25678 x 10¹²

b)

.125678 x 10^-9

c)

12.5678 x 10⁸

d)

1.25678 x 10⁸

36.

Try to change the number back to standard form: 6.79 x 10⁴

a)

679,000

b)

6,790

c)

67,900

d)

6,790,000

37.

Try to change the number back to standard form: 3.97 x 10^-2

a)

0.000397

b)

0.0397

c)

0.0000397

d)

0.397

38.

The factor multiplied by a power of 10 in scientific notation needs to be greater than or equal to one but less than ___________?

a)

1

b)

10

c)

100

d)

1,000

39.

How would you write 0.0005 in scientific notation?

a)

50 x 10⁵

b)

5 x 10⁴

c)

5 x 10³

d)

.5 x 10³

40.

How would you write -5.6 x 10^-3 in standard form?

a)

0.0056

b)

-5,600

c)

0.00056

d)

-0.0056

41.

The rule of scientific notation is to write all exponents with a base of ____.

a)

50

b)

5

c)

100

d)

10

42.

Which of the following in the LARGEST number?

a)

9 x 10⁶

b)

8 x 10¹⁰

c)

1.3 x 10¹²

d)

5.3 x 10³

43.

Which of the following numbers is the SMALLEST?

a)

8.7 x 10³

b)

3 x 10⁴

c)

1.3 x 10⁸

d)

9 x 10²

44.

Change from standard form to scientific notation: 12,000,000

a)

12.0 x 10⁷

b)

0.12 x 10⁷

c)

1.2 x 10⁶

d)

1.2 x 10⁷

45.

Change from standard form to scientific notation: 450,000

a)

4.5 x 10⁵

b)

45 x 10⁵

c)

4.5 x 10⁴

d)

4.5 x 10⁶

46.

Change from standard form to scientific notation: 0.000398

a)

39.8 x 10^-5

b)

3.98 x 10^-5

c)

3.98 x 10^-4

d)

39.8 x 10^-6

47.

Change from standard form to scientific notation: 0.004078

a)

4.078 x 10^-3

b)

4.078 x 10³

c)

40.78 x 10^-4

d)

.4078 x 10^-2

48.

125,678,000: Change to scientific notation

a)

1.25678 x 10¹²

b)

.125678 x 10^-9

c)

12.5678 x 10⁸

d)

1.25678 x 10⁸

49.

Which number is correctly written in scientific notation?

a)

5.67 x 10⁵

b)

56.7 x 10³

c)

0.567 x 10⁶

50.

Which number is correctly written in scientific notation?

a)

8.2 x 10²

b)

82 x 10⁷

c)

3.45 x 9⁴

51.

Multiply:
(9.4 x 10⁶)(3.2 x 10⁵)

a)

30.08 x 10¹¹

b)

3.8 x 10¹

c)

3.008 x 10¹²

d)

2.9375 x 10¹

52.

Divide:
(6.9 x 10⁷) / (2.3 x 10^-3)

a)

3 x 10¹⁰

b)

3 x 10⁴

c)

3 x 10^-4

d)

3 x 10^-11

53.

(9.6×10^-8)÷(2×10^-15)

a)

-4.8×10⁷

b)

4.8×10⁷

c)

4.8×10^-7

d)

-4.8×10^-7

54.

What is the simplified version of

a)

3.9 x 10⁶

b)

4 x 10²⁰

c)

4 x 10⁶

d)

3.9 x 10²⁰

55.

Multiply:
(3.4 x 10⁵)(1.2 x 10^-3)

a)

4.08 x 10^-8

b)

4.8 x 10²

c)

4.08 x 10²

d)

4.08 x 10^-15

56.

Multiply:
(9.4 x 10⁶)(3.2 x 10⁵)

a)

30.08 x 10¹¹

b)

3.8 x 10¹

c)

3.008 x 10¹²

d)

2.9375 x 10¹

57.

Solve:
(6 x 10⁶) / (2 x 10³)

a)

12 x 10³

b)

3 x 10⁹

c)

1.2 x 10⁴

d)

3 x 10³

58.

Which is the smallest?
1.3 x 10²⁰2.9 x 10²¹9.5 x 10³²8.4 x 10¹⁹

a)

1.3 x 10²⁰

b)

2.9 x 10²¹

c)

9.5 x 10³²

d)

8.4 x 10¹⁹

59.

7.82 x 10-6 is an example of scientific notation. The exponent of -6 tells you your number will be very (a) .

Choose from the below words

Large

Small

Basic

60.

Change from standard form to scientific notation: 12,000,000

a)

12.0 x 10⁷

b)

0.12 x 10⁷

c)

1.2 x 10⁶

d)

1.2 x 10⁷

61.

Change from standard form to scientific notation: 0.000398

a)

39.8 x 10^-5

b)

3.98 x 10^-5

c)

3.98 x 10^-4

d)

39.8 x 10^-6

62.

Try to change the number back to standard form: 6.79 x 10⁴

(a)

63.

How many zeros would be in this number if written in standard form?
6.47 x 10¹¹

a)

11

b)

9

c)

10

d)

12

64.

Choose the number that is written in scientific notation.

a)

0.78 x 10^-2

b)

7.8 x 10³

c)

78.0 x 10^-4

d)

780 x 10⁵

65.

Convert the following number to Scientific Notation:

9,000,000

a)

9x10^6

b)

0.9x10^7

c)

9x10^-7

d)

9x10^-6

66.

Convert the following number to Standard Notation:

$2.5\times10^3$

a)

2,500

b)

25,000

c)

2.500

d)

0.0025

67.

Convert the following number to Scientific Notation:

0.0000378

a)

37.8x10^-6

b)

3.78x10^5

c)

0.378x10^-6

d)

3.78x10^-5

68.

Convert the following number to Standard Notation:

$4\times10^5$

a)

0.40000

b)

40,000

c)

400,000

d)

0.00004

69.

Convert the following number to Scientific Notation:

670,400

a)

0.6704x10^-6

b)

6.704x10^5

c)

0.6704x10^6

d)

6.704x10^-5

70.

Convert the following number to Standard Notation:

$3.2456\times10^{-8}$

a)

0.00032456

b)

3.24560000

c)

0.000000032456

d)

324,560,000

71.

Convert the following number to Scientific Notation:

0.00000089

a)

0.89x10^6

b)

8.9x10^7

c)

8.9x10^-7

d)

0.89x10^-6

72.

Convert the following number to Standard Notation:

$9.7\times10^7$

a)

0.00000097

b)

97,000,000

c)

970,000,000

d)

9.7000000

73.

Convert the following number to Scientific Notation:

570,000,000

a)

5.7x10^8

b)

0.57x10^9

c)

5.7x10^-8

d)

0.57x10^-9

74.

Convert the following number to Standard Notation:

$8\times10^2$

a)

0.08

b)

8.00

c)

0.008

d)

800

75.

What must be true for the number "a" in scientific notation. Select all that apply.

a)

must be less than 10

b)

must be greater than 1

c)

must be greater than or equal to 1

d)

must be less than or equal to 10

e)

must be less than 1

76.

Write the following number in scientific notation.

360

a)

$3.6\times10^2$

b)

$0.36\times10^2$

c)

$3.6\times10^3$

d)

$3.6\times10^{-2}$

77.

Write the following number in scientific notation.

0.052

a)

$5.2\times10^1$

b)

$5.2\times10^{-1}$

c)

$5.2\times10^{-2}$

d)

$5.2\times10^2$

78.

Write the following number in standard form. Type your answer with no spaces and no commas.

$5.7\times10^{-1}$

(a)

79.

Write the following number in standard form. Type your answer with no spaces and no commas.

$4.35\times10^5$

(a)

80.

Choose the smaller number.

a)

$9.5\times10^4$

b)

$9.21\times10^7$

81.

Choose the smaller number.

a)

$9.5\times10^4$

b)

$9.21\times10^4$

82.

Choose the bigger number.

a)

$2.45\times10^{-6}$

b)

$7.3\times10^{-8}$

83.

Write the following number in scientific notation correctly.

$942.1\times10^8$

a)

$9.421\times10^8$

b)

$9.421\times10^5$

c)

$9.421\times10^{11}$

d)

$9.421\times10^{10}$

84.

Write the following number in scientific notation correctly.

$0.00002\times10^{-5}$

a)

$2\times10^{-11}$

b)

$2\times10^{-10}$

c)

$2\times10^0$

d)

$2\times10^{-9}$

85.

Evaluate the following expression.

$\left(2.1\times10^6\right)\left(6\times10^3\right)$

a)

$1.26\times10^{10}$

b)

$1.26\times10^9$

c)

$3.5\times10^1$

d)

$3.5\times10^2$

86.

Evaluate the following expression.

$\frac{1.4\times10^0}{7.2\times10^3}$

a)

$0.1944\times10^{-1}$

b)

$1.944\times10^{-1}$

c)

$1.944\times10^4$

d)

$1.944\times10^{-4}$

87.

Change from standard form to scientific notation: 12,000,000

a)

12.0 x 10⁷

b)

0.12 x 10⁷

c)

1.2 x 10⁶

d)

1.2 x 10⁷

88.

Change from standard form to scientific notation: 450,000

a)

4.5 x 10⁵

b)

45 x 10⁵

c)

4.5 x 10⁴

d)

4.5 x 10⁶

89.

Change from standard form to scientific notation: 0.000398

a)

39.8 x 10^-5

b)

3.98 x 10^-5

c)

3.98 x 10^-4

d)

39.8 x 10^-6

90.

Change from standard form to scientific notation: 0.004078

a)

4.078 x 10^-3

b)

4.078 x 10³

c)

40.78 x 10^-4

d)

.4078 x 10^-2

91.

Which number is correctly written in scientific notation?

a)

5.67 x 10⁵

b)

56.7 x 10³

c)

0.567 x 10⁶

92.

Consider Scientific Notation...

5 Which is the correct coefficient of 147,000 when it is written in scientific notation

a)

147

b)

14.7

c)

1.47

d)

0.147

93.

Which number is correctly written in scientific notation?

a)

8.2 x 10²

b)

82 x 10⁷

c)

3.45 x 9⁴

94.

How would you write 0.0005 in scientific notation?

a)

50 x 10⁵

b)

5 x 10⁴

c)

5 x 10³

d)

.5 x 10³

95.

How would you write -5.6 x 10^-3 in standard form?

a)

0.0056

b)

-5,600

c)

0.00056

d)

-0.0056

96.

The rule of scientific notation is to write all exponents with a base of ____.

a)

50

b)

5

c)

100

d)

10

97.

Which of the following in the LARGEST number?

a)

9 x 10⁶

b)

8 x 10¹⁰

c)

1.3 x 10¹²

d)

5.3 x 10³

98.

Which one of these is in scientific notation?

a)

8.987000

b)

8.98 x 10⁶

c)

80.987 x 10

d)

8.98⁶

99.

Write 9.8 x 10^-5in standard form

a)

0.00098

b)

0.000098

c)

.098

d)

98,000

100.

Write 0.000972 in scientific notation.

a)

9.72 x 10^-4

b)

9.72 x 10^-3

c)

972 x 10^-4

d)

9.72 x 10⁴

101.

Which is the correct coefficient of 23,400,000 when it is written in scientific notation?

a)

0.234

b)

2.34

c)

234.

d)

23.4

102.

125,678,000: Change to scientific notation

a)

1.25678 x 10¹²

b)

.125678 x 10^-9

c)

12.5678 x 10⁸

d)

1.25678 x 10⁸

103.

Try to change the number back to standard form: 6.79 x 10⁴

a)

679,000

b)

6,790

c)

67,900

d)

6,790,000

104.

Try to change the number back to standard form: 3.97 x 10^-2

a)

0.000397

b)

0.0397

c)

0.0000397

d)

0.397

105.

Write 2.08 x 10²in standard form.

a)

208

b)

0.0208

c)

20,800

d)

0.208

106.

How do you write
1001
in scientific notation?

a)

1.0001 x 10⁴

b)

1.01 x 10⁵

c)

1.001 x 10³

d)

10.1 x 10³

107.

When writing a number in scientific notation, the first number must be greater than 1, but less than 10.

a)

False

b)

True

108.

ANY number raised to a power of 0 will be....

a)

10

b)

itself

c)

1

d)

0

109.

Which of the following is correct scientific notation?

a)

20.35 x 10⁴

b)

.2035 x 10⁴

c)

2035⁴

d)

2.035 x10⁴

110.

How would you write 564,000,000 in scientific notation?

a)

5.64 x 10^-7

b)

5.64 x 10⁶

c)

5.64 x 10⁸

d)

56.4 x 10⁷

111.

When writing a number in scientific notation, the first number must be greater than 1, but less than 10.

a)

False

b)

True

112.

Express the following in scientific notation:
.000457

a)

457 x 10⁶

b)

457 x 10^-6

c)

4.57 x10⁴

d)

4.57 x 10^-4

113.

ANY number raised to a power of 0 will be....

a)

10

b)

itself

c)

1

d)

0

114.

Which of the following is correct scientific notation?

a)

20.35 x 10⁴

b)

.2035 x 10⁴

c)

2035⁴

d)

2.035 x10⁴

115.

Convert to scientific notation:

520,000,000

a)

52 x 10⁷

b)

5.2 x 10^-7

c)

5.2 x 10⁸

d)

0.52 x 10⁹

116.

Write 7.113 x 10⁷ in standard form.

a)

71,130,000

b)

7,113,000

c)

0.0000007113

d)

7,113

117.

Write 0.00000707 in scientific notation.

a)

7.07 x 10^-6

b)

7.07 x 10⁶

c)

707 x 10⁸

d)

707 x 10^-8

118.

Write 7.8 x 10^-3in standard form.

a)

0.0078

b)

7,800

c)

78

d)

0.078

119.

Multiply:
(3.4 x 10⁵)(1.2 x 10^-3)

a)

4.08 x 10^-8

b)

4.8 x 10²

c)

4.08 x 10²

d)

4.08 x 10^-15

120.

Divide:
(6.9 x 10⁷) / (2.3 x 10^-3)

a)

3 x 10¹⁰

b)

3 x 10⁴

c)

3 x 10^-4

d)

3 x 10^-11

121.

Multiply:
(9.4 x 10⁶)(3.2 x 10⁵)

a)

30.08 x 10¹¹

b)

3.8 x 10¹

c)

3.008 x 10¹²

d)

2.9375 x 10¹

122.

Solve:
(6 x 10⁶) / (2 x 10³)

a)

12 x 10³

b)

3 x 10⁹

c)

1.2 x 10⁴

d)

3 x 10³

123.

Which is the smallest?
1.3 x 10²⁰2.9 x 10²¹9.5 x 10³²8.4 x 10¹⁹

a)

1.3 x 10²⁰

b)

2.9 x 10²¹

c)

9.5 x 10³²

d)

8.4 x 10¹⁹

124.

How do you write 1.28 x 10^-4

a)

0.128

b)

0.0000128

c)

0.0128

d)

0.000128

125.

Write in scientific notation. 0.0000000000000913

a)

9.13 x 10¹⁴

b)

9.13 x 10^-14

c)

9.13 x 10¹³

d)

9.13 x 10^-13

126.

What is 1.1 x 10⁷in standard form?

a)

11,000,000

b)

11 x 10⁸

c)

1,100

d)

1.1

127.

Write 3,450,000 in scientific notation.

a)

34.5 x 10⁶

b)

3.45 x 10⁶

c)

3.45 x 10⁷

d)

34.5 x 10⁵

128.

How do you write
8.317 x 10⁶in standard form?

a)

8, 371, 000

b)

83, 170, 000

c)

837, 100

d)

8, 317, 000

129.

What is the simplified version of

a)

3.9 x 10⁶

b)

4 x 10²⁰

c)

4 x 10⁶

d)

3.9 x 10²⁰

130.

(3⁴)(3⁷)

a)

3²⁸

b)

3³

c)

3^-3

d)

3¹¹

131.

(x⁸)(x^-5)

a)

x^-40

b)

x^-13

c)

x¹³

d)

x³

132.

(5⁸) / (5³)

a)

5⁵

b)

1⁵

c)

5¹¹

d)

1¹¹

133.

(8⁵)³

a)

8⁸

b)

8¹⁵

c)

8²

d)

1/8²

134.

(t^-6)^-5

a)

t^-11

b)

t^-30

c)

t³⁰

d)

t¹¹

135.

x^-42

a)

1⁴²/x

b)

x⁴²/1

c)

x/1⁴²

d)

1/x⁴²

136.

How would you write 4.3756 x 10⁴in standard form?

a)

437,560,000

b)

0.00043756

c)

43,756

d)

4,3756

137.

How would you write 0.0005 in scientific notation?

a)

50 x 10⁵

b)

5 x 10⁴

c)

5 x 10³

d)

.5 x 10³

138.

How would you write -5.6 x 10^-3 in standard form?

a)

0.0056

b)

-5,600

c)

0.00056

d)

-0.0056

139.

How do you write
8.317 x 10⁶in standard form?

a)

8, 371, 000

b)

83, 170, 000

c)

837, 100

d)

8, 317, 000

140.

What is the simplified form of
(3.25 x 10³)(7.8 x 10⁶)

a)

2.535 x 10¹⁰

b)

2.535 x 10¹⁸

c)

2.535 x 10¹⁹

d)

2.535 x 10⁹

141.

a)

3.9 x 10⁶

b)

4 x 10²⁰

c)

4 x 10⁶

d)

3.9 x 10²⁰

142.

Write 0.00000054 in scientific notation.

a)

54 x 10⁸

b)

5.4 x 10⁷

c)

54 x 10^-8

d)

5.4 x 10^-7

143.

Write 3.5 x 10⁶in standard notation.

a)

0.0000035

b)

35,000,000

c)

3,500,000

d)

0.00000035

144.

Write 42,000 in scientific notation.

a)

42.000 x 10³

b)

4.2 x 10^-4

c)

4.2 x 10⁴

d)

0.42 x 10⁵

145.

Write 9.31 x 10^-5in standard notation.

a)

93,100,000

b)

931,000

c)

0.00000931

d)

0.0000931

146.

Write 3.629 x 10⁷in standard notation.

a)

36,290,000,000

b)

36,290,000

c)

0.00000003629

d)

0.00003629

147.

Write 5,890,000,000 in scientific notation.

a)

5.89 x 10⁹

b)

0.589 x 10¹⁰

c)

589 x 10⁷

d)

5.89 x 10^-9

148.

Write 0.0003 in scientific notation.

a)

3 x 10⁴

b)

3 x 10^-4

c)

0.3 x 10³

d)

0.3 x 10^-3

149.

Write 0.216 in scientific notation.

a)

216 x 10³

b)

216 x 10^-3

c)

2.16 x 10¹

d)

2.16 x 10^-1

150.

Write 8.063 x 10^-4in standard notation.

a)

0.00008063

b)

80,630

c)

0.0008063

d)

80,630,000

151.

Write 0.000009 in scientific notation.

a)

9 x 10^-6

b)

9 x 10⁶

c)

0.9 x 10^-5

d)

0.9 x 10⁵

152.

Write 2.07 x 10⁵in standard notation.

a)

20,700,000

b)

0.00000207

c)

0.0000207

d)

207,000

153.

Write 8 x 10⁸in standard notation.

a)

80,000,000

b)

800,000,000

c)

0.000000008

d)

0.00000008

154.

Write 4 x 10^-3in standard notation.

a)

0.0004

b)

0.004

c)

4,000

d)

4.000

155.

Write 7,000,000 in scientific notation.

a)

0.7 x 10⁷

b)

7 x 10^-6

c)

7 x 10⁶

d)

70 x 10⁵

156.

Write 6,081,000,000,000 in scientific notation.

a)

0.6081 x 10¹³

b)

6.081 x 10^-12

c)

6081 x 10⁹

d)

6.081 x 10¹²

157.

Write 5.43 x 10^-7in standard notation.

a)

0.000000543

b)

0.0000000543

c)

5,430,000,000

d)

54,300,000

Scientific notation

Total questions: 157

Worksheet time: 4hrs 12mins

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