Download or read book Prealgebra Blastoff! written by Josh Rappaport and published by Prealgebra Blastoff!. This book was released on 2006-01-30 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: Empowering parents and educators to help children master pre-algebra topics, particularly the confusing rules for positive and negative numbers, this sci-fi comic book format uses interlocking foam manipulatives to demonstrate how numbers combine.