INSTRUCTOR’S SOLUTIONS
MANUAL
D EVELOPMENTAL
MATHEMATICS
FOURTH EDITION
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Elayn Martin-Gay
University of New Orleans
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, Contents
Chapter 1 1
Chapter 2 50
Chapter 3 85
Chapter 4 133
Chapter 5 171
Chapter 6 219
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Chapter 7 247
Chapter 8 271
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Chapter 9 307
Chapter 10 369
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Chapter 11 428
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Chapter 12 473
Chapter 13 519
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Chapter 14 559
Chapter 15 611
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Chapter 16 647
Appendices 702
Practice Final Exam 736
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, Chapter 1
Section 1.2 Practice Exercises 4. The number 900 + 60 + 5 is written in expanded
form.
1. The place value of the 8 in 38,760,005 is
millions. 5. In a whole number, each group of 3 digits is
called a period.
2. The place value of the 8 in 67,890 is hundreds.
6. The place value of the digit 4 in the whole
3. The place value of the 8 in 481,922 is ten- number 264 is ones.
thousands.
7. hundreds
4. 67 is written as sixty-seven.
8. To read (or write) a number, read from left to
5. 395 is written as three hundred ninety-five. right.
6. 12,804 is written as twelve thousand, eight 9. 80,000
hundred four.
10. Boott Spur
7. 321,670,200 is written as three hundred twenty- Exercise Set 1.2
one million, six hundred seventy thousand, two
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hundred. 2. The place value of the 5 in 905 is ones.
8. Twenty-nine in standard form is 29. 4. The place value of the 5 in 6527 is hundreds.
9. Seven hundred ten in standard form is 710. 6. The place value of the 5 in 79,050,000 is ten-
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thousands.
10. Twenty-six thousand, seventy-one in standard
form is 26,071. 8. The place value of the 5 in 51,682,700 is ten-
millions.
11. Six million, five hundred seven in standard form
is 6,000,507. 10. 316 is written as three hundred sixteen.
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12. 1,047,608 12. 5445 is written as five thousand, four hundred
= 1,000,000 + 40,000 + 7000 + 600 + 8 forty-five.
14. 42,009 is written as forty-two thousand, nine.
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13. a. Find “France” in the left column. Then read
from left to right until the “Literature”
column is reached. We find that 11 16. 3,204,000 is written as three million, two
Literature Nobel Prize winners were born in hundred four thousand.
France. 18. 47,033,107 is written as forty-seven million,
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thirty-three thousand, one hundred seven.
b. Look at the “Total” column. Three countries
have more than 60 Nobel Prize winners. The 20. 22,806 is written as twenty-two thousand, eight
United States has 259, the United Kingdom hundred six.
has 99, and Germany has 77.
22. 118,049 is written as one hundred eighteen
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Vocabulary, Readiness & Vocabulary Check 1.2 thousand, forty-nine.
1. The numbers 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 24. 347,219 is written as three hundred forty-seven
12, ... are called whole numbers. thousand, two hundred nineteen.
2. The number 1,286 is written in standard form. 26. 11,239 is written as eleven thousand, two
hundred thirty-nine.
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3. The number “twenty-one” is written in words.
28. 202,700 is written as two hundred two thousand,
seven hundred.
Copyright © 2020 Pearson Education, Inc. 1
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, Chapter 1: The Whole Numbers ISM: Developmental Mathematics
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. 5 trillion in the American system is written as
sixteen in standard form is 16,405,016. 5,000,000,000,000 in standard form.
36. Two million, twelve in standard form is Section 1.3 Practice Exercises
2,000,012.
1. 7235
38. Six hundred forty thousand, eight hundred + 542
eighty-one in standard form is 640,881. 7777
40. Two hundred thirty-four thousand in standard 11 11
form is 234,000. 2. 27,364
+ 92,977
42. Two thousand eighty in standard form is 2080. 120,341
44. Ninety-one million, seventy-one thousand 3. 11 + 7 + 8 + 9 + 13
dollars in standard form is $91,071,000.
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46. Two thousand, five hundred forty-four in
standard form is 2544. 20 + 8 + 20
48. 789 = 700 + 80 + 9
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50. 6040 = 6000 + 40
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52. 20,215 = 20,000 + 200 + 10 + 5 4. 19
5042
54. 99,032 = 90,000 + 9000 + 30 + 2 638
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+ 526
56. 47,703,029 = 40,000,000 + 7,000,000 + 700,000 6225
+ 3000 + 20 + 9
5. 2 cm + 8 cm + 15 cm + 5 cm = 30 cm
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58. The elevation of Mt. Washington in standard The perimeter is 30 centimeters.
form is 6288. 6288 is written as six thousand,
two hundred eighty-eight. 6. 647 + 647 + 647 = 1941
The perimeter is 1941 feet.
60. 5712 = 5000 + 700 + 10 + 2
7. 70
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62. The second tallest mountain in New England is + 50
Mt. Adams.
120
64. The British Museum in London had more Georgia produces 120 million pounds of
visitors than the Shanghai Science and freestone peaches.
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Technology Museum in Shanghai.
8. a. The country with the fewest threatened
66. The number of visitors to the Louvre was mammal species corresponds to the shortest
8,700,000 which is written as eight million, bar, which is Malaysia.
seven hundred thousand.
b. To find the total number of threatened
68. Three of the museums listed were visited by mammal species for Brazil, India, and
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fewer than 6,000,000 people. Mexico, we add.
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