SOLUTIONS MANUAL
For
PREALGEBRA
EIGTH EDITION
By
Elayn Martin-Gay
, Chapter 1
Section 1.2 Practice Exercises 5. In a whole number, each group of 3 digits is
called a period.
1. The place value of the 8 in 38,760,005 is
millions. 6. The place value of the digit 4 in the whole
number 264 is ones.
2. The place value of the 8 in 67,890 is hundreds.
7. hundreds
3. The place value of the 8 in 481,922 is ten-
thousands. 8. To read (or write) a number, read from left to
right.
4. 54 is written as fifty-four.
9. 80,000
5. 678 is written as six hundred seventy-eight.
10. Boxer
6. 93,205 is written as ninety-three thousand, two
hundred five. Exercise Set 1.2
7. 679,430,105 is written as six hundred seventy- 2. The place value of the 5 in 905 is ones.
nine million, four hundred thirty thousand, one
hundred five. 4. The place value of the 5 in 6527 is hundreds.
8. Thirty-seven in standard form is 37. 6. The place value of the 5 in 79,050,000 is ten-
thousands.
9. Two hundred twelve in standard form is 212.
8. The place value of the 5 in 51,682,700 is ten-
10. Eight thousand, two hundred seventy-four in millions.
standard form is 8,274 or 8274.
10. 316 is written as three hundred sixteen.
11. Five million, fifty-seven thousand, twenty-six in
standard form is 5,057,026. 12. 5445 is written as five thousand, four hundred
forty-five.
12. 4,026,301
= 4,000,000 + 20,000 + 6000 + 300 + 1 14. 42,009 is written as forty-two thousand, nine.
13. a. Find Australia in the “Country” column. 16. 3,204,000 is written as three million, two
Read from left to right until the “bronze” hundred four thousand.
column is reached. Australia won
10 bronze medals. 18. 47,033,107 is written as forty-seven million,
thirty-three thousand, one hundred seven.
b. Find the countries for which the entry in the
“Total” column is greater than 60. The 20. 254 is written as two hundred fifty-four.
United States, China, and Great Britain won
more than 60 medals. 22. 119,926 is written as one hundred nineteen
thousand, nine hundred twenty-six.
Vocabulary, Readiness & Video Check 1.2
24. 50,400,000,000 is written as fifty billion, four
1. The numbers 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, hundred million.
12, ... are called whole numbers.
26. 11,239 is written as eleven thousand, two
2. The number 1286 is written in standard form. hundred thirty-nine.
3. The number “twenty-one” is written in words. 28. 202,700 is written as two hundred two thousand,
seven hundred.
4. The number 900 + 60 + 5 is written in expanded
form.
Copyright © 2019 Pearson Education, Inc. 1
, Contents
Chapter 1 1
Chapter 2 42
Chapter 3 71
Chapter 4 101
Chapter 5 164
Chapter 6 209
Chapter 7 246
Chapter 8 284
Chapter 9 329
Chapter 10 370
Appendices 389
Practice Final Exam 392
, Chapter 1: The Whole Numbers ISM: Prealgebra
30. Four thousand, four hundred sixty-eight in 70. The largest number is 77,753.
standard form is 4468.
72. Yes
32. Seventy-three thousand, two in standard form is
73,002. 74. answers may vary
34. Sixteen million, four hundred five thousand, 76. A quadrillion in standard form is
sixteen in standard form is 16,405,016. 1,000,000,000,000,000.
36. Two million, twelve in standard form is Section 1.3 Practice Exercises
2,000,012.
1. 4135
38. Six hundred forty thousand, eight hundred + 252
eighty-one in standard form is 640,881. 4387
40. Two hundred thirty-four thousand in standard 1 1 11
form is 234,000. 47,364
2.
42. One thousand, eight hundred fifteen in standard + 135,898
form is 1815. 183, 262
44. Two hundred eight million, eight hundred six 3. Notice 12 + 8 = 20 and 4 + 6 = 10.
thousand, two hundred seventy in standard form 12 + 4 + 8 + 6 + 5 = 20 + 10 + 5 = 35
is 208,806,270.
12 2
46. Seven hundred nine in standard form is 709. 4. 6432
789
48. 789 = 700 + 80 + 9 54
+ 28
50. 6040 = 6000 + 40
7303
52. 20,215 = 20,000 + 200 + 10 + 5
5. a. 14 − 6 = 8 because 8 + 6 = 14.
54. 99,032 = 90,000 + 9000 + 30 + 2
b. 20 − 8 = 12 because 12 + 8 = 20
56. 47,703,029 = 40,000,000 + 7,000,000 + 700,000
+ 3000 + 20 + 9 c. 93 − 93 = 0 because 0 + 93 = 93.
58. Mount Baker erupted in 1792, which is in d. 42 − 0 = 42 because 42 + 0 = 42.
standard form.
6. a. 9143 Check: 9021
60. Mount Shasta and Mount St. Helens have each − 122 + 122
had two eruptions listed.
9021 9143
62. Mount St. Helens has an eruption listed in 1980.
All other eruptions listed in the table occurred b. 978 Check: 127
before this one. − 851 + 851
127 978
64. More German shepherds are registered than
Golden retrievers. 8 17
7. a. 69 7 Check: 648
66. German shepherds are second in popularity. 26 −49 + 49
is written as twenty-six.
64 8 697
68. The maximum height of an average-size
standard poodle is 26 inches.
2 Copyright © 2019 Pearson Education, Inc.
For
PREALGEBRA
EIGTH EDITION
By
Elayn Martin-Gay
, Chapter 1
Section 1.2 Practice Exercises 5. In a whole number, each group of 3 digits is
called a period.
1. The place value of the 8 in 38,760,005 is
millions. 6. The place value of the digit 4 in the whole
number 264 is ones.
2. The place value of the 8 in 67,890 is hundreds.
7. hundreds
3. The place value of the 8 in 481,922 is ten-
thousands. 8. To read (or write) a number, read from left to
right.
4. 54 is written as fifty-four.
9. 80,000
5. 678 is written as six hundred seventy-eight.
10. Boxer
6. 93,205 is written as ninety-three thousand, two
hundred five. Exercise Set 1.2
7. 679,430,105 is written as six hundred seventy- 2. The place value of the 5 in 905 is ones.
nine million, four hundred thirty thousand, one
hundred five. 4. The place value of the 5 in 6527 is hundreds.
8. Thirty-seven in standard form is 37. 6. The place value of the 5 in 79,050,000 is ten-
thousands.
9. Two hundred twelve in standard form is 212.
8. The place value of the 5 in 51,682,700 is ten-
10. Eight thousand, two hundred seventy-four in millions.
standard form is 8,274 or 8274.
10. 316 is written as three hundred sixteen.
11. Five million, fifty-seven thousand, twenty-six in
standard form is 5,057,026. 12. 5445 is written as five thousand, four hundred
forty-five.
12. 4,026,301
= 4,000,000 + 20,000 + 6000 + 300 + 1 14. 42,009 is written as forty-two thousand, nine.
13. a. Find Australia in the “Country” column. 16. 3,204,000 is written as three million, two
Read from left to right until the “bronze” hundred four thousand.
column is reached. Australia won
10 bronze medals. 18. 47,033,107 is written as forty-seven million,
thirty-three thousand, one hundred seven.
b. Find the countries for which the entry in the
“Total” column is greater than 60. The 20. 254 is written as two hundred fifty-four.
United States, China, and Great Britain won
more than 60 medals. 22. 119,926 is written as one hundred nineteen
thousand, nine hundred twenty-six.
Vocabulary, Readiness & Video Check 1.2
24. 50,400,000,000 is written as fifty billion, four
1. The numbers 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, hundred million.
12, ... are called whole numbers.
26. 11,239 is written as eleven thousand, two
2. The number 1286 is written in standard form. hundred thirty-nine.
3. The number “twenty-one” is written in words. 28. 202,700 is written as two hundred two thousand,
seven hundred.
4. The number 900 + 60 + 5 is written in expanded
form.
Copyright © 2019 Pearson Education, Inc. 1
, Contents
Chapter 1 1
Chapter 2 42
Chapter 3 71
Chapter 4 101
Chapter 5 164
Chapter 6 209
Chapter 7 246
Chapter 8 284
Chapter 9 329
Chapter 10 370
Appendices 389
Practice Final Exam 392
, Chapter 1: The Whole Numbers ISM: Prealgebra
30. Four thousand, four hundred sixty-eight in 70. The largest number is 77,753.
standard form is 4468.
72. Yes
32. Seventy-three thousand, two in standard form is
73,002. 74. answers may vary
34. Sixteen million, four hundred five thousand, 76. A quadrillion in standard form is
sixteen in standard form is 16,405,016. 1,000,000,000,000,000.
36. Two million, twelve in standard form is Section 1.3 Practice Exercises
2,000,012.
1. 4135
38. Six hundred forty thousand, eight hundred + 252
eighty-one in standard form is 640,881. 4387
40. Two hundred thirty-four thousand in standard 1 1 11
form is 234,000. 47,364
2.
42. One thousand, eight hundred fifteen in standard + 135,898
form is 1815. 183, 262
44. Two hundred eight million, eight hundred six 3. Notice 12 + 8 = 20 and 4 + 6 = 10.
thousand, two hundred seventy in standard form 12 + 4 + 8 + 6 + 5 = 20 + 10 + 5 = 35
is 208,806,270.
12 2
46. Seven hundred nine in standard form is 709. 4. 6432
789
48. 789 = 700 + 80 + 9 54
+ 28
50. 6040 = 6000 + 40
7303
52. 20,215 = 20,000 + 200 + 10 + 5
5. a. 14 − 6 = 8 because 8 + 6 = 14.
54. 99,032 = 90,000 + 9000 + 30 + 2
b. 20 − 8 = 12 because 12 + 8 = 20
56. 47,703,029 = 40,000,000 + 7,000,000 + 700,000
+ 3000 + 20 + 9 c. 93 − 93 = 0 because 0 + 93 = 93.
58. Mount Baker erupted in 1792, which is in d. 42 − 0 = 42 because 42 + 0 = 42.
standard form.
6. a. 9143 Check: 9021
60. Mount Shasta and Mount St. Helens have each − 122 + 122
had two eruptions listed.
9021 9143
62. Mount St. Helens has an eruption listed in 1980.
All other eruptions listed in the table occurred b. 978 Check: 127
before this one. − 851 + 851
127 978
64. More German shepherds are registered than
Golden retrievers. 8 17
7. a. 69 7 Check: 648
66. German shepherds are second in popularity. 26 −49 + 49
is written as twenty-six.
64 8 697
68. The maximum height of an average-size
standard poodle is 26 inches.
2 Copyright © 2019 Pearson Education, Inc.
