Gr 1-4-Digit, a cartoon character made out of numbers, appears in each of these books to help children learn mathematical concepts. The actual word problems appear in bold italics and are followed by explanations of what is involved in solving them. Usually, there is one problem on each double-page spread, loosely tied together in theme with something the kids are doing with school, sports, or friends, thus reinforcing the fact that math is a part of everyday life. Solutions are also printed in bold italics on the facing page. Colorful, somewhat cartoonish illustrations dominate the books, often offering clues to the solution. These are good supplemental math books containing the types of problems teachers could use for homework or enrichment. However, there are more words than beginning math students might care to read and more pictures than middle-elementary students might tolerate. Only libraries with a proven demand for supplemental math material should consider purchasing these books.-Nancy A. Gifford, Schenectady County Public Library, NY Copyright 1999 Cahners Business Information.