Too many students end their study of mathematics before ever taking an algebra course. Others attempt to study algebra, but are unprepared and cannot keep up. Key to Algebra was developed with the belief that anyone can learn basic algebra if the subject is presented in a friendly, non-threatening manner and someone is available to help when needed. Some teachers find that their students benefit by working through these book before enrolling in a regular algebra course; others use them as supplemental help and review. In books 1-4, students study multiplying, division, integers, area, perimeter, exponents, distributive principle, equations, polynomials, quadratic equations and more. This answer key provides brief notes to the teacher and gives the answers to the workbook problems. Student pages are reduced and overlaid with the correct answers. Accompanies Key to Algebra Book 1, Key to Algebra Book 2, Key to Algebra Book 3, and Key to Algebra Book 4.