Because the book is still under copyright protection. Legal free PDFs are rare. Most free versions are user-uploaded scans of dubious legality. When in doubt, borrow via a library’s digital lending program.
Focus solely on integers. Do every odd-numbered problem in the integer chapter. Use a separate notebook—do not type your work. Week 3-4: Master fractions. Nichols is famous for brutal fraction drills. Do not skip the review sets. Week 5-6: Equations. Write each step vertically. Check your answer by substitution. Week 7-8: Exponents and polynomials. Recite the laws of exponents aloud before bed. Week 9-10: Mixed review. Take a practice final exam from the back of the book under timed conditions (60 minutes). pre algebra mathematics nichols pdf