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Chalk Dust Company
PMB 256
16107 Kensington Dr
Sugar Land, TX 77479-4401

800.588.7564 (USA)
281.265.2495
281.265.3197 fax

sales@chalkdust.com

Prealgebra Value
Corrections and Clarifications
(new program from Sept 2007)
Workbook and Exercises Book
Section 1.3, problem 7. Change (191) to (19).

Section 1.3, problem 38. Change 432 mi to 513 mi.

Chapter 1 Review, problem 3. Change 4,297 to 4,207.

Chapter 1 Review, problem 18. Change x2y2 to x3y2

Section 2.1, Additional Exercises, problem 5. The plus sign should not be included in the problem. Since it is included, in the solutions guide it is also correct to say the expression is, "negative eight plus the opposite of negative forty-six."

Section 3.2, problems 2-6. Change the statement to: "Write the improper fraction as a mixed number or a whole number".

Section 3.2, problem 7 and 8. Change the statement to: "Write the mixed number or whole number as an improper fraction".

Section 4.1, problem 22. Change the word "Hundred-thousandths" to "Ten-thousandths".

Section 4.3, problem 8. The word company is misspelled in the problem.

Section 4.4, problem 35. In the problem description, the weight of the person on the surface of the earth should be 144 pounds rather than 189 pounds.

Section 4.5, problem 9. Change "x<-2" to "x>-2".

Section 5.2, example 3. In the second step, change "2" to "20". The rest of the problem is correct.

Section 5.3, problems 12-16. Change the instructions from "Subtract" to "Subtract-Use a Horizontal Format".

Section 5.3, problems 17-20. Insert these instructions: "Subtract use a Vertical Format".

Section 5.7, problems 16-21. After problem 15, insert these instructions: "Translate into a Variable Expression, then Simplify".

Section 5.7, Additional Exercises, problems 1-4. Above problem 1, insert these instructions: "Translate into a Variable Expression".

Section 5.7, Additional Exercises, problems 5-15. After problem 5, insert these instructions: "Translate into a Variable Expression, then Simplify".

Section 6.3 Exercises, problem 35 and Section 6.3 Additional Exercises, problem 15. Insert these instructions: "Use the Formula...F1 x = F2 (d-x)". The 1 and 2 are subscripts.

Section 6.4, Exercise Instructions. Change to "Translate Into an Equation and Solve".

Section 6.4, problems 15 and 16. Change the numbering for problem 15 to problem 16, and for problem 16 to problem 15.

Section 6.5, example 1. The first parenthesis should read (-2,-3).

Section 6.5, problems 6 and 7. The terms abscissa and ordinate appear without explanation or definitions. The terms have become obscure in today's math world and there is no need to be overly concerned with them. Some books include them and some have omitted them. Here are the definitions.

The abscissa (the x-coordinate) measures a horizontal distance. In the ordered pair (2,3), 2 is the abscissa.

The ordinate (the y-coordinate) measures a vertical distance. In the ordered pair (2,3), 3 is the ordinate.

Section 6.5 problems 16,17,18. Renumber problem 16 to 17, and renumber problem 17 to 18. Problem 18 is not on the Solutions CD (or CD#2).

Section 7.3. Solutions may not print from the Solutions CD (or CD#2).

Section 7.4, problem 23. Spelling error for the word "softball".

Chapter 7 Review, problem 28. Spelling error for the word "investment".

Chapter 7 Review, problem 33. Spelling errors for the words "receiving","year's","receives", and "receive".

Section 8.3, problem 1. In the first sentence, change the number of books to 2,437,000.

Section 8.5. Solutions may not print from the Solutions CD (or CD#2).

Section 9.1, additional exercises, problem 13. The answer in the solutions guide is incomplete. Although it is correct that x = 12, the angles are not both 12 degrees. To find the measure of one of the angles, use the expression for the angle and replace x with 12. For example, since one of the angles is 7x, replace x with 12 to get 7(12) which is 84, so the two vertical angles are both 84 degrees.

Section 9.3, problem 9. Cross out "14 ft" above the right triangle DEF.

Section 9.4, problems 16-20. Write the word "Solve" above problem 16.

Section 9.5, problem 17. Insert the length of the base as 8 ft (and the width of the base is 3 ft as stated).

Section 10.3 Exercises. Adjacent to problems 1-3 is a table which you should label as "Table A".

Section 10.3 Exercises, problems 13 and 14. Omit problem 13. Re-label problems 13-24 as one number lower than listed. So, problem 14 becomes problem 13, etc.

Prealgebra Value
Corrections and Clarifications
(new program from Sept 2007)
Solutions CD
The Solutions CD may not contain the step-by-step solutions for Section 3.4 (problems 31-35), Section 3.6, or Section 5.2, but the answers to each question are as follows. And step-by-step solutions are available upon request to 800-588-7564. A new Solutions CD is available upon request (since Dec 2007).

Section 3.4, Solutions CD, Exercise Solutions, problems 31-35.

31. 16.5 feet per rod   198 inches per rod
32. 22 miles per gallon
33. 12.5 pounds of burgers to buy
34. The remaining piece of board is 1 foot long
35. Area = 4.875 square miles

Section 3.6, Solutions CD, Exercise Solutions, problems 1-30.

1. 25/64
2. -1/216
3. 12 1/4
4. 5/128
5. 50/243
6. -1/10
7. 11 1/9
8. -27/49
9. -27/64
10. -25/512
11. 9/49
12. -8/9
13. -2 1/10
14. 6
15. -1/2
16. 3 3/11
17. 17
18. -4/5
19. 1
20. 5/36
21.
22. 8/9
23. 4
24. 0
25. 1/2
26. 1 4/5
27. 1 1/9
28. 1 15/16
29. 1 1/3
30. Yes

Section 3.6, Solutions CD, Additional Exercise Solutions, problems 1-15.

1. -8/343
2. 3/125
3. 1/121
4. 1/75
5. 16/81
6. 25/144
7. 3/4
8. 7/9
9. 8/19
10. 5/8
11. 1 7/16
12. 1 1/5
13. 3/50
14. 1 5/18
15. 13/18

Section 5.2, Solutions CD, Exercise Solutions.

1. 9a2, -12a, 4b2
2. 6x2 y, 7xy2
3. coefficient of x2 : 1, coefficient of -6x : -6
4. coefficient of -x : -1
5. 23c
6. 8h
7. -11p
8. -8y
9. 0
10. 7m - 6n
11. 2r + 13p
12. -3w + 2v
13. 13y2 + 1
14. -15c2 + 12c
15. 5a2 b + 8ab2
16. 5
17. 11x2 - 2x
18. 8b2 - 2b
19. 7x + 2
20. 10y + 6
21. 4a + 4
22. 21d + 25
23. -12x + 28
24. -18m - 52
25. -42w + 67
26. 20c + 23
27. 26k - 44
28. 8a + 5b
29. 22x - 39y
30. -2v + 13
31. -18x - 2
32. -5c - 6
33. 11n - 26
34. -9x + 6
35. 88y - 77

Section 5.2, Solutions CD, Additional Exercise Solutions.

1. 3x2
2. -2n2, 5n
3. coefficient of 12a2 : 12, coefficient of 4ab : 4
4. coefficient of x2 y : 1, coefficient of -x : -1, coefficient of y : 1
5. 11y
6. -7z
7. -6w
8. 0
9. 10c -17
10. -4xy2 - 2x2 y
11. 9v
12. -13x - 2y
13. 2a + 21
14. -114w + 52
15. 111v + 246

Prealgebra Traditional
Corrections and Clarifications
(3rd edition from March 2002)
The last objective in each section is often entitled Applications and Formulas or just Applications. Limit the number of problems assigned in this sub-section to about 4 to 6 problems. Problems under Critical Thinking may be omitted as well as Projects in Mathematics.

Solutions Guide, Section 1.2, page 7 problem 41. The value for "c" from the textbook is 7,038 and it was incorrectly reflected in the solutions guide as 48, 441. The total for a+b+c should be 56,010.

Section 1.3, problem 76. The area should be 81 square feet.

Chapter 1 Review Exercises, problem 29. The answer in the solutions guide should be 56.

Section 2.1, problem 135. The answer to this problem does not appear in the Solutions Guide nor the Text. The answer is Student C. Here is why. We're told that both statements are false. When an "or" statement is false, both parts have to be false. So when Student A says it was either Student B or Student D, we know it can be neither of them. Student D said it was neither Student B nor Student C. In order for Student D to be lying it must be one of them. Since Student B was eliminated earlier, it must be Student C.

Section 2.3, problem 41b. In the solutions guide the annual net income for Bradlees would be -$93,920,000 rather than the -$16,576,000 listed.

Chapter 2 Test, problem 27. The correct answer is -11 rather than 11.

Section 3.3, #147(b). In the solutions guide, "GM" should be replaced with "Ford" and the first two steps in the calculation are incorrect because the GM high is used in those steps. However, the answer is correct.

Section 3.4, #160. In the solutions guide, the product of 21 and 13 should be 273 rather than 651. The solution is correct as printed.

Section 4.1, #72. In the solutions guide, the diagram is off register a bit and should be justified just a bit to the right to point to the correct digits. Also, the decimal given is for the previous problem. The correct answer should be 2.97527.

Chapter 4 Test, problem 7. The answer in the Solutions Guide is incorrect because the decimal point is in the wrong position. The correct answer is 6.697.

Section 5.1, #50. The constant in the answer should be -2 rather than -1.

Section 5.5, problem 20. In the solutions guide, the last term of the answer should be positive.

Section 5.6, #55. The problem is written differently in the solutions guide. The correct answer is 1.6 x 1010.

Section 5.6, #59. The problem is written differently in the solutions guide. The correct answer is 1 x 10-12.

Chapter 6 Review, problem 24. In the Solutions Guide, in the first few steps the numbers used in the problem are not correct. The number 302 should be 322 and the number 28 should be 8.

Section 7.5, #1. Part (a) is the only example of direct variation because k is not the coefficient of a variable in the others.

Section 7.5, #2. Parts (a) and (c) represent "d varies directly as t" because they are of the form... d=kt with k=400 in part (a), and k=25 in part (c).

Chapter 7, Cumulative Review, problem 16. In the solutions guide, the variable "y" is missing from the first term.

Chapter 8, Review Exercises, problem 31. In the Solutions Manual, the calculation of the fraction of a year corresponding with 45 days uses 360 in the denominator and it should be 365 to reflect the information in Section 8.5. The resulting answer will be $31.81.

Section 9.1, problem 44. In the solutions guide, the measure of the angle in the final step should read 136 degrees rather than 138 degrees.

Chapter 9 Review, #1. In the solutions guide, an angle "c" is used in the solution and there is no angle c labeled in the original figure. Angle c is the angle inside the triangle that is supplementary to angle a.

Chapter 9 Test, problem 10. The answer in the solutions guide should be 135 square meters rather than 155 square meters.

Section 10.2, problem 17. The numbers used to solve the problem in the solutions guide are not the same as the numbers given in the text. Please omit this problem.

Section 10.3, problem 11. The solutions guide lists the number of favorable outcomes as 1 and the number should be 6.

Chapter 10 Cumulative Review Exercises, problem 16. The solution in the solutions guide does not patch the question. Please omit the problem.

Chapter 10 test, problem 3. The answer is calculated correctly at 16% but is written incorrectly as 18%.

Prealgebra
Corrections and Clarifications
(2nd edition from Feb 2002)
The last objective in each section is often entitled Applications and Formulas or just Applications. Limit the number of problems assigned in this sub-section to about 4 to 6 problems. Problems under Critical Thinking may be omitted as well as Projects in Mathematics.

Is a graphing calculator needed for Prealgebra? No, the need for a graphing calculator at the Preagebra level is marginal. But if the student plans to attend college in the sciences we would recommend the TI-83 or TI-83 plus, because it will be needed in future math and physics courses. It is powerful, user friendly, and comes with an easy to navigate guidebook.

Section 1.1, margin exercise #13. The 6 on the right side of the equation should be a 5.

Section 1.5, problem 35. The trick in working problems 21-40 on page 60 is to re-write the number as the product of several factors. On all of these the same little factor is used over and over. To find the factor and to find out how many times it is used, try to divide some small numbers into the number given. if the division goes evenly, then you can re-write the number as a product of two other numbers. For #35, a little trial and error will reveal that 3 goes into 243 evenly and it goes 81 times; that means 243 can be written as 3 times 81. Then you look at the 81 factor to see if you can break it down by dividing by 3, and so on like this:
243 = 3 (81)
243 = 3 (3) (27)
243 = 3 (3) (3) (9)
243 = 3 (3) (3) (3) (3)
243 = 3^5

Section 4.6, problem 31. The answer in the back of the textbook (1 inch for the width; 2.5 inch for the length) is incorrect. The answer in the solutions guide (3 inch for the width; 7.5 inch for the length) is correct.

Section 5.2, problem 25. Think of the number next to a letter as telling you how many of that letter you have; 5x means you have five x's, 0.03x means you have 0.03 x's, and when you have just x, well, you have one x. In 0.03x - x, you think of it as 0.03x - 1x and to bring them together you collect the numbers next to the x's, or (0.03-1)x, which is -0.97x.

Section 5.3, problems 17, 19, and 21. In the solutions guide the multiplying factor is incorrect because a 1 is attached in the tens digit. Therefore, the answers to those problems are incorrect. The correct answers are 2.036, 0.002028, and 1.616202 respectively.

Chapter 8, Chapter Test, problem 19. The problem is listed differently in the text and the solutions guide. The bottom polynomial should read 5x-4, and not 5x-4 + 2^2.

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