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Name
LESSON
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Date
Class
Practice B
3-5 Scientific Notation
Write each number in scientific notation.
1. 16,700
2. 4,680
3. 320,500
4. 7,590,000
5. 58,340,000
6. 108,690,000
Write each number in standard form.
7. 3.25 • 104
10. 6.8 • 108
8. 7.08 • 106
9. 1.209 • 107
11. 0.51 • 105
12. 0.006 • 103
Identify the answer choice that is not equal to the given
number.
13. 356,000
A 300,000 ! 56,000
B 3.56 • 105
C 3.56 • 104
14. 1.28 • 106
A 100,000 ! 28,000
B 1,280,000
C 12.8 • 105
15. 1,659,000
A 1,600,000 ! 59,000
B 1.659 • 106
C 16.59 • 106
16. 0.074 • 103
A 70.0 ! 4.0
B 7.4 • 105
C 7.4 • 101
17. In 2000, the population of
Pennsylvania was 12,281,054. Round
this figure to the nearest hundred
thousand. Then write that number in
scientific notation.
18. In 2000, the population of North
Carolina was about 8.05 • 106, and
the population of South Carolina was
about 4.01 • 106. Write the combined
populations of these two states in
standard form.
Copyright © by Holt, Rinehart and Winston.
All rights reserved.
49
Holt Middle School Math Course 1
Practice A
3-5 Scientific Notation
Exploration Recording Sheet
3-5 Scientific Notation
LESSON
CHAPTER
Circle the letter of the correct answer.
You can use exponents to represent powers of 10.
101 ! 10
102 ! 10 " 10 ! 100
103 ! 10 " 10 " 10 ! 1,000
104 ! 10 " 10 " 10 " 10 ! 10,000
1. Which of the following shows 85,000
written in scientific notation?
A 8.5 • 103
B 8.5 • 104
!
C 8.5 • 105
D 8.5 • 106
Find each product.
1. 6.2 " 101
2. 6.2 " 102
62.5
3. 6.2 " 103
625
4. 6.2 " 104
6,250
62,500
Fill in the blanks to make each equation true.
3. 1,200 ! 1.2 • 10
In scientific notation, numbers are written as the product
of a power of 10 and a number starting with the ones place.
Number
Scientific Notation
6,250
6.25 " 103
62.50
6.25 " 101
625
6.25 " 102
1
2
340
4
Possible answer: Write as a number between 1 and 10 and a power of 10.
10. Explain how you know that 6.25 " 106 ! 6,250,000.
Holt Middle School Math Course 1
Practice B
3-5 Scientific Notation
1. 6,389,000
5. 4.8 billion
3.569 • 109
6. 152 million
4.8 • 109
1.52 • 108
Write each number in standard form.
Write each number in standard form.
8. 7.08 • 106
7. 1.5089 • 104
9. 1.209 • 107
7,080,000
12. 0.006 • 10
51,000
13. 356,000
A 300,000 # 56,000
B 3.56 • 105
C 3.56 • 104
!
14. 1.28 • 106
A 100,000 # 28,000
!
B 1,280,000
C 12.8 • 105
13. 250 km !
15. 1,659,000
A 1,600,000 # 59,000
B 1.659 • 106
C 16.59 • 106
!
16. 0.074 • 103
A 70.0 # 4.0
B 7.4 • 105
!
C 7.4 • 101
17. 0.73 m !
17. In 2000, the population of
Pennsylvania was 12,281,054. Round
this figure to the nearest hundred
thousand. Then write that number in
scientific notation.
18. In 2000, the population of North
Carolina was about 8.05 • 106, and
the population of South Carolina was
about 4.01 • 106. Write the combined
populations of these two states in
standard form.
12,300,000; 1.23 • 10
15. 89 L !
Copyright © by Holt, Rinehart and Winston.
All rights reserved.
2,840
Holt Middle School Math Course 1
2.5 • 105
8.69
4
8.9 • 10
14. 0.065 kg !
m
16. 1,540 km !
mL
2
7.3 • 10
18. 10,240 kg !
mm
6.5 • 101
g
8
1.54 • 10
cm
7
1.024 • 10
g
20. On average, about 1.1 • 109
passengers use the New York City
subway system each year. About
1,170,000,000 passengers use the
Paris subway each year. How many
passengers use those two subways
each year?
19. In a recent count, 147,171,000
people in the United States owned
cars. In the same year, 4.268 • 107
people in Japan owned cars. In which
country did more people own cars?
How many more?
the United States;
2,270,000,000 passengers
104,491,000 more people
12,060,000
49
17,711,000
12. 0.0869 • 102
Write each measurement using scientific notation.
Identify the answer choice that is not equal to the given
number.
7
11. 0.284 • 104
3,960,400
6
9. 1.7711 • 107
251,600,000
10. 3.9604 • 106
3
11. 0.51 • 10
8. 2.516 • 108
15,089
12,090,000
5
680,000,000
7.508 • 106
1.052 • 10
4. 3,569,000,000
1.0869 • 108
3. 7,508,000
8
6.389 • 10
6. 108,690,000
5.834 • 107
10. 6.8 • 10
Holt Middle School Math Course 1
2. 105,200,000
6
3.205 • 10
5. 58,340,000
8
130,000 pounds
48
Copyright © by Holt, Rinehart and Winston.
All rights reserved.
5
4.68 • 10
32,500
16. Blue whales are the largest marine
mammals. The average blue whale
weighs 1.3 • 105 pounds. Write this
weight in standard form.
Write each number in scientific notation.
3. 320,500
3
7. 3.25 • 104
1,280,000
Practice C
3-5 Scientific Notation
2. 4,680
7.59 • 106
960,000
LESSON
Write each number in scientific notation.
4. 7,590,000
1,750
14. 1.28 • 106
1.1 • 104 pounds
LESSON
Copyright © by Holt, Rinehart and Winston.
All rights reserved.
79,000
15. African elephants are the largest land
mammals. The average African
elephant weighs 11,000 pounds.
Write this weight in scientific
notation.
If you move the decimal 6 places to the right you get 6,250,000.
1.67 • 10
11. 1.75 • 103
13. 9.6 • 105
124,000
4
8.9
10. 7.9 • 104
12. 1.24 • 105
9. Describe the process for writing numbers in
scientific notation.
1. 16,700
• 106
8. 8,900,000 !
6.58
9. 3.4 • 102
Think and Discuss
47
2
• 103
7. 6,580 !
Write each number in standard form.
8. 42,500 ! 4.25 " 10
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All rights reserved.
5. 580 ! 5.8 • 10
4
• 105
4.7
6. 425 ! 4.25 " 10
3
7. 4,250 ! 4.25 " 10
4. 25,000 ! 2.5 • 10
3
6. 470,000 !
Write each number in scientific notation by filling in the
exponent for the power of 10.
5. 42.5 ! 4.25 " 10
2. Which of the following shows
3.67 • 105 written in standard form?
F 3,670
G 36,700
H 367,000
!
J 3,670,000
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All rights reserved.
121
50
Holt Middle School Math Course 1
Holt Middle School Math Course 1