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Scientific Notation Worksheets - Page 2

Scientific Notation Worksheets
  • Page 2
 11.  
The annual rainfall in Alabama is about 0.000898 mi. Identify the scientific notation.
a.
8.98 × 10-5
b.
8.98 × 10-3
c.
8.98 × 10-4
d.
8.98 × 104


Answer: (c)


Correct answer : (3)
 12.  
The mean distance from Venus to Sun is about 1.08 × 109 km. Express the number in standard form.
a.
1,080,000,000 km
b.
108,000,000 km
c.
180,000,000 km
d.
18,000,000 km


Answer: (a)


Correct answer : (1)
 13.  
Choose the scientific notation of 0.00025.
a.
2.5 × 104
b.
2.5 × 10-5
c.
2.5 × 10-3
d.
2.5 × 10-4


Answer: (d)


Correct answer : (4)
 14.  
Express the quotient in scientific notation. Express the answer in decimal form with the same number of significant digits as in the least accurate number given.
71.1 × 1026.2 × 10- 2
a.
11.4787 × 104
b.
5.73 × 104
c.
1.147 × 105
d.
12.468 × 104


Answer: (c)


Correct answer : (3)
 15.  
The height of a building in New York is 2,125 ft. Express the number in scientific notation.
a.
2.125 × 102 ft
b.
2.125 × 103 ft
c.
2.125 × 104 ft
d.
2.125 × 105 ft


Answer: (b)


Correct answer : (2)
 16.  
The mean distance from Mars to Earth is about 2.98 × 108 km. Express the number in standard form.
a.
298,000,000 km
b.
2,980,000,000 km
c.
29,800,000 km
d.
290,800,000 km


Answer: (a)


Correct answer : (1)
 17.  
Simplify and express the result in scientific notation.
2.1 × 10- 76 × 10- 2
a.
- 3.5 × 10 - 6
b.
- 3.5 × 106
c.
3.5 × 106
d.
3.5 × 10 - 6


Answer: (d)


Correct answer : (4)
 18.  
Express the quotient in scientific notation. Express the answer in decimal form with the same number of significant digits as in the least accurate number given.
65.5 × 1046.9 × 10- 4
a.
4.74 × 108
b.
9.5037 × 108
c.
10.493 × 108
d.
9.49 × 108


Answer: (d)


Correct answer : (4)
 19.  
Simplify and express the result in scientific notation.
(7.2 × 108) (6.7 × 109)
a.
4.824 ×1018
b.
4.824 × 1016
c.
4.824 × 1017
d.
4.824


Answer: (a)


Correct answer : (1)
 20.  
Identify the largest number.
a.
9.61 × 102
b.
9.21 × 104
c.
9.81 × 103
d.
9.41 × 104


Solution:

Order the exponents.

4 > 3 > 2
So, 104 > 103 > 102.

Compare numbers with the same exponent.

9.41 > 9.21
So, 9.41 × 104 > 9.21 × 104 > 9.81 × 103 > 9.61 × 102.

Therefore, the largest number is 9.41 × 104.


Correct answer : (4)

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