Scientific Notation Answer Key
1.
2.
3.
4.
5.
Which expression below is the number 3,000,000 (3 million) in scientific notation?
a.
1.0 × 106
b.
3.0 × 610
c.
3.0 × 106
d.
3,000,000 × 106
Write .0083 in scientific notation.
a.
8.3 × 103
b.
8.3 × 104
c.
8.3 × 10−3
d.
8.3
Write the number 64,000 in scientific notation.
a.
6.4 × 104
b.
6.4 × 10−4
c.
6.4 × 105
d.
6.4 × 10−5
What is the number 0.00003007 expressed in scientific notation?
a.
3.007 × 105 .
b.
3.7 × 10−5 .
c.
3.007 × 10−5 .
d.
3.007 × 10−4 .
How do you express 1,870,000 in scientific notation?
a.
5.49 × 10−8
b.
1.87 × 10−6
c.
1.87 × 106
d.
187 × 106
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6.
Perform the indicated computation. Give the answer in scientific notation.
6.9 × 108
3 × 105
7.
a.
2.3 × 103
b.
2.3 × 1013
c.
2.3 × 10−3
d.
2.3 × 104
Perform the indicated computation. Give the answer in scientific notation.
(6.1 × 105 )(4 × 10−9 )
8.
a.
2.44
b.
2.44 × 103
c.
2.44 × 10−3
d.
2.44 × 1014
I. For each of the following numbers, by how many places must the decimal point be moved to express the
number in scientific notation?
II. In each case will the exponent be positive, negative, or zero?
a. 55,651
b. 0.000008991
c. 2.04
d. 883,541
e. 0.09814
a. 4, positive
b. 6, negative
c. 0, zero
d. 5, positive
e. 2, negative
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9.
Write the following in scientific notation.
8,345,000
0.0000124
8,670,000,000
8.345 x 10^6
1.24 x 10^-5
8.67 x 10^9
10. Write the following in standard notation.
8.2 × 108
5.68 × 10−3
4.839 × 107
820,000,000
0.00568
48,390,000
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