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Scientific Notation Worksheets - Page 3

Scientific Notation Worksheets
  • Page 3
 21.  
Which among the following numbers is the smallest?
a.
6.31 × 10- 7
b.
3.07 × 10- 6
c.
6.31 × 10- 8
d.
8.61 × 10- 8


Solution:

Order the exponents.

- 8 < - 7 < - 6
So, 10- 8 < 10- 7 < 10- 6.

Compare numbers with the same exponent.

6.31 < 8.61
So, 6.31 × 10- 8 < 8.61 × 10- 8 < 6.31 ×10- 7 < 3.07 × 10- 6.

Therefore, the smallest number is 6.31 × 10- 8.


Correct answer : (3)
 22.  
Choose the largest number.
a.
2.51 × 105
b.
4.01 × 104
c.
2.51 × 106
d.
3.41 × 105


Answer: (c)


Correct answer : (3)
 23.  
Which among the following numbers is the largest?
a.
8.52 × 104
b.
9.92 × 103
c.
8.52 × 105
d.
9.32 × 104


Answer: (c)


Correct answer : (3)
 24.  
Which among the following numbers is the smallest?
a.
7.81 × 102
b.
6.31 × 104
c.
6.31 × 103
d.
7.21 × 103


Answer: (a)


Correct answer : (1)
 25.  
Choose the smallest number.
a.
4.81 × 102
b.
3.31 × 103
c.
3.31 × 104
d.
4.21 × 103


Answer: (a)


Correct answer : (1)
 26.  
Identify the largest number.
a.
3.04 × 10-4
b.
6.92 × 10-4
c.
6.32 × 10-4
d.
6.92 × 10-3


Answer: (d)


Correct answer : (4)
 27.  
Identify the smallest number.
a.
3.61 × 10- 3
b.
1.04 × 10- 2
c.
2.31 × 10- 3
d.
3.61 × 10- 4


Solution:

Order the exponents.

- 4 < - 3 < - 2
So, 10- 4 < 10- 3 < 10- 2.

Compare numbers with the same exponent.

2.31 < 3.61
So, 3.61 × 10- 4 < 2.31 × 10- 3 < 3.61 × 10- 3 < 1.04 × 10- 2.

Therefore, the smallest number is 3.61 × 10- 4.


Correct answer : (4)
 28.  
Which among the following numbers is the largest?
a.
5.81 × 10- 7
b.
4.71 × 10- 7
c.
6.21 × 10- 8
d.
3.71 × 10- 6


Solution:

Order the exponents.

- 6 > - 7 > - 8
So, 10- 6 > 10- 7 > 10- 8.

Compare numbers with the same exponent.

5.81 > 4.71
So, 3.71 × 10- 6 > 5.81 × 10- 7 > 4.71 × 10- 7 > 6.21 × 10- 8.

Therefore, the largest number is 3.71 × 10- 6.


Correct answer : (4)
 29.  
Choose the smallest number.
a.
9.35 × 107
b.
5.33 × 108
c.
5.33 × 109
d.
6.33 × 108


Solution:

Order the exponents.

7 < 8 < 9
So, 107 < 108 < 109.

Compare numbers with the same exponent.

5.33 < 6.33
So, 9.35 × 107 < 5.33 × 108 < 6.33 × 108 < 5.33 × 109.

Therefore, the smallest number is 9.35 × 107.


Correct answer : (1)
 30.  
Which of the following is equivalent to 10-3?
a.
- 0.001
b.
0.01
c.
- 1000
d.
0.001


Answer: (d)


Correct answer : (4)

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