Chapter 1: Whole Numbers; Worked Examples 1 and 2 (p. 8) Chapter 1: Whole Numbers; Challenging Problems (p. 12) Chapter 2: The Four Operations of Whole Numbers; Worked Example 1 (p. 21) Chapter 13: Review Questions 1; Practice Questions (p. 172) Chapter 15: Review Questions 3; Challenging Problems (p. 199)