Principles of Mathematics – Book 2 – Additional Resources and Corrections

Principles of Mathematics Book 2This is an online webpage designed to go along with Book 2 of Principles of Mathematics. (View Book 1 instead.)

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Helpful Resources

Chapter 4 – Math Witnessing Video

Note: All the links below go to external sights; we have no control over the content, nor is a listing here an endorsement. Feel free to find other online resources instead–these are just listed here as a convenience.

Resources for Extra Worksheets

Below are some sites that offer printable worksheets if your student needs extra practice or drill on a concept.

Percent problems:

Graphing problems:


p. 81: “Subtract -3/8” should read “Subtract 3/8”.

p. 42 – Prime number wording should include the word “evenly.”

“Whole numbers that can’t be evenly divided by any whole number but themselves and 1.”

p. 50 – On both of the maps, -160o should read -150o.

p. 55 – In the first example, “Remember, UTC-0:300…” should be “Remember, UTC-03:00.”

p. 259 – In the words of the example, it should say “greater than 0” rather than “greater than or equal to 0.”

Student Workbook/Teacher Guide

p. 76 (Worksheet 5.3B), problem 3b

Question should say “travel 15 miles” as opposed to “travel 5 miles.”

p. 164, question 5
Questions b. and c. referring back to 4a should read to refer back to 5a.

p. 381 (Answers for Worksheet 10.5), problem 1d

Answer should be x < 55o F.

p. 381 (Answers for Worksheet 10.5), problem 2d

Answer should be x ≤ 95.

p. 398 (Answers for Worksheet 15.4, problem 3a)

The graph should look like the photo shown here.


p. 413 (Answers for Quiz 1, problem 3b)

The answer should read 8,064 cubic inches, not square inches.

p. 414 (Answers for Quiz 4, problem 2a)

The answer should read 120 cubic feet, not square feet.

p. 416 (Answers for Quiz 13, problem 3a)

The answer should be 4, not 2.

p. 418 (Answers to Test 1, problem g)
The answer key addresses the question “How many cubit feet is the cylinder portion of these 4 silos if the cylinder portion of each one has a radius of 6 ft and a height of 32 ft?”
As the question is worded currently, the answer (p. 418) should include an additional step:

Bushels in all 4 cylinders = 14,469.12 ft3 • 12 in/1 ft • 12 in/1 ft • 12 in/1 ft • 1 bushel/2,150.42 in3 = 11,626.86 bushels

Alternately, the question can be modified to only ask for the volume in cubic feet.

Note: The conversion between bushels and cubic feet is found on p. 430.

p. 420 (Answers for Test 5, problem 3a)
The column in the table labeled b should be -600, 0, 600; the column in the table labeled p should be -300, 0, 300.

Clarification on Quizzes and Tests:
When students are told they can consult reference sheets, they are allowed to consult any reference sheet (p. 423-433) even if fewer page numbers are listed.

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