Math Tutor PreAlgebra Author:Harold Torrance The Math Tutor series provides step-by-step instruction in the most common math concepts needed by students of all ages. Included are practice exercises, reviews, and vocabulary definitions. Math Tutor: Pre-Algebra covers factoring, positive and negative numbers, order of operations, variables, exponents, and various formulas such as perimeter, ... more »area, and volume. Correlated to state, national, and Canadian provincial standards. 80 pages« less